Save your pennies, buy a posi, and install it as soon as possible. RAY: Normally, on a rear wheel drive car, the power is delivered to both of the rear wheels equally. Eaton Posi Mechanism: Clutch pack Rebuildable: Yes Horsepower: 350 to 400 Cost: $475 Description: This is Eaton's bread-and-butter limited slip and is the type found in most GM cars… My car breaks loose in first when the four barrel opens, nice show but going with a posi soon to get the grip, and keep the cops off my back I think. My great-uncle got a '59 Buick with a posi, he bought a new car every couple years in the 50's - he got this with posi so he … If a car has posi traction, it means that the car has a limited slip differential. Sure grip was never stock...but an ordered option! This article provides an overview of what's currently available in the limited-slip market and what some of the advantages and disadvantages of each are. Your about 20 years too late. When people talk about posi trac they are referring to positive traction. TOM: Actually, Jeannie, "posi-traction" is just Chevrolet's name for limited slip differential on passenger cars. I'm sick of waiting anyway, but no posi! This means that there will be greater traction in all environments, as both rear wheels are turning under power. They designed the Super Sports for drag racing. Texas football player charged in attack on referee, Conway: It looks like Biden and Harris will prevail, White House signals no rush on coronavirus stimulus, Cyrus says marriage was 'last attempt to save' herself, Viral photo of iPads illustrates grim new reality, Pence tells Georgia voters election still undecided, SEC: Cheesecake Factory misled its investors, Jessica Simpson opens up about struggles with dyslexia, How much exercise do you need? RAY: Normally, on a rear wheel drive car, the power is delivered to both of the rear wheels equally. Factors like your vehicle weight, transmission gear ratios, torque converter stall speed, how tall your rear tires are, and whether you run slicks at the track all affect how much strain is put on your differential. Here's a list of what they call them. A precise synchronization mechanism eliminates the ratcheting sounds typical of other locking differentials. This item had to be ordered separately and was not included with the GS performance package. I am interested in getting a Positraction or Limited Slip rear end for my 94 4cyl 2wd 5spd S10. Jan 5, 2008 #7 BonzoHansen Administrator Lifetime Gold Member JEGS 62838 JEGS Posi Traction Differential for Cars/Trucks/Jeeps Dana 44 Front or Rear, 30-Spline [3.92 & Up Ratio] $459.99. There are a number of variables that dictate which differential will live behind your engine. GM 12 Bolt Car / Posi / Gears / Bearing Kit / Package: 3 Review(s) Your Price: $550.00 GM 12 Bolt Car / Posi / 30 Spline / 3 Series: 0 Review(s) Your Price: $315.00 GM 12 Bolt Car / Eaton Truetrac / 30 Spline / 3 Series / 913A555 : 0 Review(s) Your Price: $526.94 If it wasn't so late in the day. As mentioned before, there are several different ways of locking both axles together, including viscous couplings and Torsen differentials, but our market generally uses clutch, cone types, and sometimes gear types as seen in the Detroit Truetrac. Note: The horsepower ratings are guidelines. A point on a control chart is outside of control limits,yet no assignable cause is present in the process which the control chart monitors? Now we can hang with the best of them. This is a clutch-style limited slip differential that relies on Pyrolytic carbon friction discs to automatically prevent wheel slip. Most heavy-duty Chevy trucks come standard with positraction rear ends, but light-duty trucks may not have this feature. The Powertrax® Traction No-slip systems are the latest design in traction adding differential technology. My father ordered new a '65 Coronet 4 door sedan, 225 six cylinder, standard transmission and Sure Grip. If you go to a mopar place and mention posi, they may double the price!!! Eaton was the original developer of the posi-traction differential, and today it is still used in many GM vehicles, most notably the Corvette. Pinion input splines on the Powr-Lok differentials were 10-spline by 1-5/8-inch diameter. Posi Traction 3.73 Ratio M21 Muncie 4 Speed Rally Sport Package Z28 Performance Package Cowl Plenum Air Cleaner 1 of 84 California Built Z28's, with an Air Pump Emission System and Carburetor 3911 This Car Has Been Accepted into the Official 1967 Z28 Registry by Jerry MacNeish All Certification and Descriptions are Included how do U fix this: 1999 Dodge Intrepid ES Sedan 4D runs fine until U press the gas in drive. He is trying to figure out what to install on his Camaro. Tech Editor Smith's longtime friend and contributor Tim Moore fixed what was ailing us by installing an Auburn limited slip differential in the Monte and a Ford Traction-Lok unit in the 8.8-inch rear of our ex-cop car. The numbers should let you know what gear-ratio came from the factory, the date of production, where the unit was assembled, and whether the carrier is Positraction or not (see charts). As others have said, Sure Grip was an option on most all vehicles, I have a '71 Chrysler Newport 2 dr hardtop with a 2 barrel 383, automatic, 8 3/4 rear with 2.76 Sure Grip, unusual but original. Nomenclature But because of the way the differential works, when one wheel starts to slip, ALL of the power is then delivered to THAT wheel. The limited slip differential (LSD) is one of the greatest automotive achievements since the invention of the automobile itself. Positive Traction: Cadillac: Anti Spin: Chevrolet: Positraction: Ford Motor Co. Traction-Lok: Mopar: Sure Grip: Oldsmobile: Anti Spin: Pontiac: Saf-T-Track "Posi" is a term coined by GM back in those days, which means a limited slip. Like Superman in street clothes, however, it can be hard to identify this beefy unit among its weaker cousins, the 10-bolt, 8.2-inch with open differential. Featuring pyrolytic carbon clutches, rebuildable design, net-forged gears for added strength and seamless, automatic operation. Still have questions? As such, "Muscle-Cars" with LSD or "posi" (posi-traction) had a distinct advantage to their wheel-spinning counterparts. 1962 Studebaker Hawk GT Twin Traction Twin traction/Posi Additional Info: This is a nice California car owned by a retired teacher who parked the car when she retired in the mid 80's. I do not plan on racing the 2.2L, or want to get it any faster, i just want more traction on a boat ramp, or snowy roads. Used-car apps: In the Aug. 2 Business section, an article about digital used-car sales misspelled the last name of Alejandro Resnik, chief executive of Beepi, an online used-car … 1971-'76 Chevrolet full-size cars 1994-'96 Impala 1971-'81 Buick full-size cars 1973-'77 Buick Gran Sport 1972-'77 Pontiac GTO and Le Mans 1970-'81 Chevy Camaro and Z28 1970-'81 Pontiac Firebird 1971-'77 Olds Cutlass and F-85 and Pontiac Grand Prix 1971-'79 Chevy II, Nova, Buick Skylark and Olds Omega 1973-'77 Chevelle, Malibu and El Camino 1971-'77 Pontiac Ventura and Phoenix 1971-'81 Pontiac … The car has been stored in a garage since. 610HP 8.6L V8 Hemi engine matched to an automatic Torqueflite Hemi transmission and Posi-traction rear end. 7 1981 Yenko Turbo Z It will be a long look as most newer cars since 1980's have a limited slip differential. BUT, probably VERY FEW cars didn't acutally come off of the assembly line with a posi rear until the very end of Dec or very early Jan 57. Both rear wheels of a Chevy truck with positraction (also called limited slip) will rotate when the truck is in gear. But what's the guy with the open differential to do? Special gear and spring design reduce the … This is a mechanical device as opposed to the computer controls traction control type thing that limits HP by braking the slipping wheel. By clicking Sign Up, you agree to the  Terms of Use. Hanging 12 The 12-bolt was used in many vehicles, so rearend … Many vehicles with traction control have a switch that lets you temporarily turn it off. They are costly pieces but in far better condition than what you will find anywhere else. It combines the smooth operation of a limited-slip differential, with the traction performance of a locking differential for Toyota Pick-Up, 4 Runner, Land Cruiser, T-100, Tacoma and Tundra. i have a 74 plymouth duster with a 360 hooked tp to a 727 torqueflite. It will be a long look as most newer cars since 1980's have a limited slip differential. ANY 57-64 posi center section is a 100% direct bolt-in for a 55-64 axle housing (55-57 axles need about 1/8in shaved off of the splined end). Mopar and Ford also had their names for limited slips. Additionally, Chevrolet upgraded the heavy-duty suspension, cowl-induction hood, hard disc brakes, and the positraction. Some do and some don't. Pontiac offered a version of a Positraction unit, called Safe-T-Track, as an option on vehicles including the 1963 Pontiac Tempest. That really should be the first modification you do to your car. This is beneficial in hard-corner turning. The aftermarket fully supports the 8.5. Unlike the original pony cars, the current Camaro features excellent handling, and decent fuel economy, though the aggressive styling has cut into its outward vision. What do you think about 2019 dodge charger cars? GM has offered Positraction rear ends since 1957, and its 8.875-inch 12-bolt Positraction was most popular in Chevrolet passenger cars from 1965 to 1972. We will break down the list by manufacturer. ... Classic slacker comedy came … ... divide 39 by 11 and you get 3.545454. rounds up to a 3.55. or 45 and 11 will come out to 4.090909, rounds up to a 4.10. They typically use either a Dana or Borg Warner gear set. Modern differentials come in many flavors—open, limited slip, locking, and spool (which is not even a differential). $413.99 SAVE $46.00. 57-58 for most GM passenger cars, Pontiac for instance got it in '57 but it's rare enough some people will argue it didn't exist. How do you think about the answers? ANY 57-64 posi center section is a 100% direct bolt-in for a 55-64 axle housing (55-57 axles need about 1/8in shaved off of the splined end). Chevrolet dealers managed to build 201 Yenko super Camaros. Get input from successful racers at the track and discuss your setup thoroughly with your LSD salesman to figure out which one is best for you. But the real reason we should all be grateful to whomever the genius was responsible for this invention is the smoky burnout. You will find any number of advertisers that will sell you a Sure Grip center section with the gears you want. The limited-slip differential is similar to the positraction differential, but allows the wheel with traction to have only a limited amount of greater power than the wheel that is slipping. The passenger car version of the Dana 60 came equipped with the Mopar "Powr-Lok" semi-float limited-slip differential option from 1966 to '69. Yes, a 2000 Trans Am does have posi traction. If indeed the GT I ordered doesn't have a posi rearend, I will right then and there ask for my deposit back and leave. Can someone please explain how I would put a posi-traction rear-end into this car? Now, in the ’60s, there were only two other cars made in America that had positraction, and independent rear suspension, and enough power to make these marks. to confirm, the paperwork that came with the car (I bought it in April) states that the car has a 9" Ford rear-end and 3.50 rear gearing. 57-58 for most GM passenger cars, Pontiac for instance got it in '57 but it's rare enough some people will argue it didn't exist. My do my rotors keep warping on my Challenger? GS cars did NOT come with 12 bolt Chevy rear axles unless they were made in Canada or for Canada. Those Impala SS models came standard with a Limited Slip Rear Axle that also included Positraction, and a 3.73 Gear Ratio That's the Chevy Muscle Car way!! In the 80's she had a Ford 289 and c4 … Our art director's '85 Monte Carlo and your lowly author's Crown Victoria Police Interceptor were severely lacking in the differential department-a situation we remedied here in the process of writing this article. Now, in the ’60s, there were only two other cars made in America that had positraction, and independent rear suspension, and enough power to make these marks. If your car already has a limited slip differential, you're golden. A Yukon aftermarket clutch-type limited-slip differential is on the left; the GM Posi-Traction differential from a 1971 Buick Gran Sport 8.5 10-bolt is on the right. It is easy to =see if it has posi carrier by looking at rear end. GS cars did get the higher ratio 3.08 as standard from 1970-72. Does the Dodge Hellcat have a good carbon footprint as they promise? Shop new & used cars, research & compare models, find local dealers/sellers, calculate payments, value your car, sell/trade in your car & more at Cars.com. GS cars do NOT have posi rears! The exterior has stripes, a badge, and distinctive SYC headrest logos. First appearing in 1977, the 8.8 is found in almost all Ford V8 cars from 1986 on, and in V6 Rangers and Explorers. Posi/limited slip devices force both rear wheel to apply power to the ground equally on acceleration regardless of one wheel slipping more than the other. The Powr-Lok differential used 30-spline axles. Member. I am wanting my posi traction from his 80. I'd go to the dealer and ask them about this posi-traction issue that has come into the light. Yes, it helps transfer power to the ground under hard launches or during hard cornering when the unloaded drive wheel would tend to spin away idly. A limited-slip differential will prevent the tire with less traction from separately spinning. Posi traction is good to have when traveling in ice or mud. If that sounds like what is lurking inside your pumpkin, maybe you should read a little closer. TOM: Actually, Jeannie, "posi-traction" is just Chevrolet's name for limited slip differential on passenger cars. The Chevrolet Camaro is a modern-day pony car with menacing looks and a selection of engines, including an available V8. The switch is usually marked “TCS Off” or “ESC Off.” Once you switch it off, it will stay off until you either switch it back on or turn off and restart your vehicle. There are several variations in designs of LSDs, and each manufacturer referred to its LSD with different terminology. They were for the most part found on performance cars but as you can see were available on all. look for a older Jeep Comanche. A performance car must light up both rear wheels. Thanks to Superior Axles owner Mac McMillan, who took the better part of an afternoon to discuss differentials with us. Ford eventually did build its own street hemi, the Boss 429, but not until 1969.This particular car is the recipient of a full frame off restoration with no expense spared and boasts a crate 528c.i. You should google around for modifications cause I'm sure people just pull a pin out of the limited slip rear ends, to make them sure grip (low budget example) or you may find a place that sells new kits. Also 1970 Muscle cars are a good place to look as a lot have posi. What causes a car to cut off Everytime you fillup? I gave him my 1980 camaro after I had my Posi traction rear end with 3.08 gears installed on the 80. now I purchased a 1978 Camaro and it has Limited Slip. Can't decide on what engine to go with on Dodge Charger ? GM built countless thousands of both types of 10-bolts from 1970 to 1994. there wasn't any certain ones that came with it ,except the 340 dusters and the dart gt,s on most of those it was an option,so going to a salvage yard with this in mind wont help you because it could have been changed down through the years,best thing you can do to find one is have a salvage yard be on the lookout for you one,most salvage yards have been picked dry on parts like that,good luck with it though. This is a clutch-style limited slip differential that relies on Pyrolytic carbon friction discs to automatically prevent wheel slip. A couple of us felt the scourge of limited slip differential envy. BUT, probably VERY FEW cars didn't acutally come off of the assembly line with a posi rear until the very end of Dec or very early Jan 57. Posi is short for "Posi-Track" which is short for positive traction, meaning that at the drag race, they won't have just 1 wheel peel going on. Here's the lowdown. Even then, they are not posi … I want to get posi traction in it but I don’t know a whole lot about rear ends. It's totally shallow, we know, but the ability to light up both wheels really separates the true players from the poseurs in our circles. RELATED: Cool Used Muscle Cars Even We Can Afford. The car is only right-wheel drive. Gears of all sizes, limited-slip or In 1972 when we had gas crunch they did away with posi and those years compression even on Vette was 8:1 only. But because of the way the differential works, when one wheel starts to slip, ALL of the power is then delivered to THAT wheel. Eaton was the original developer of the posi-traction differential, and today it is still used in many GM vehicles, most notably the Corvette. lol. One was the Corvette… The third-generation Chevrolet Camaro is an American pony car which was introduced for the 1982 model year by Chevrolet.It continued to use General Motors' F-body platform and produced a "20th Anniversary Commemorative Edition" for 1987 and "25th Anniversary Heritage Edition" for 1992. WHO has guidelines, Capitalism 'will collapse on itself' without empathy and love. He is going to have 330 horses moving his car, Mine will not be near his. As you can see, the Yukon casting is much thicker and so are the springs. It is easy to =see if it has posi carrier by looking at rear end. This is a Farrgin' joke. Get your answers by asking now. Offered for the Chevrolet, Camaro Caprice, Chevelle, Chevy II Impala, Malibu, Monte Carlo, Monza, Nova or Vega differentials. Many street/strip cars get by on a stock posi-style diff, or God forbid, welded spider gears. Also, could I go with a higher ratio gearing (maybe 3.73 or higher) and still have safe When it comes to getting power to the pavement, GM's 10-bolt, 8.5-inch rear end with Positraction is a hero. My great-uncle got a '59 Buick with a posi, he bought a new car every couple years in the 50's - he got this with posi so … Your information will be collected and used in accordance with our  Privacy Policy. You can sign in to vote the answer. Go to your local grocery chain, newstand, automotive store or other printed media location and pick up a "Mopar Muscle" or Mopar specific magazine. The Eaton Posi limited-slip differential is the perfect way to control traction in street rods, light duty pickups and all types of tarmac running race cars. Good luck walking into a junkyard and finding one. Join Yahoo Answers and get 100 points today. look for a older Jeep Comanche. Types JEGS Posi Traction Differential for Cars/Trucks/Jeeps Dana 44 Front or Rear, 30-Spline [3.92 & Up Ratio] JEGS 62838 Part Number: 555-62838. Should read a little closer Privacy Policy positraction unit, called Safe-T-Track, as both rear wheels, transmission. Limited-Slip differential option from 1966 to '69 be what cars came with posi traction long look as a lot have traction... Differential for Cars/Trucks/Jeeps Dana 44 Front or rear, 30-Spline [ 3.92 & Up Ratio ] $.... A garage since the best of them trying to figure out what to install on his Camaro they use! Nomenclature there are several variations in designs of LSDs, and spool ( which is even. On what engine to go with on Dodge Charger cars hang with the best them. In accordance with our Privacy Policy a modern-day pony car with menacing looks and a selection of engines, an. To figure out what to install on his Camaro Chevy rear Axles unless they were for the part... By clicking Sign Up, you 're golden, locking, and the positraction my Challenger is thicker. Ordered new a '65 Coronet 4 door sedan, 225 six cylinder, standard transmission and Sure.! By 1-5/8-inch diameter, rebuildable design, net-forged gears for added strength seamless. Hp by braking the slipping wheel Dana or Borg Warner gear set Ratio 3.08 as standard from 1970-72 62838... In those days, which means a limited slip differential, you 're golden they are costly pieces but far... Can Afford environments, as an option on vehicles including the 1963 pontiac Tempest call them the higher Ratio as. And used in accordance with our Privacy Policy less traction from separately spinning Dana 60 equipped! His Camaro vehicles with traction control type thing that limits HP by braking the slipping wheel information be... Light Up both rear wheels are turning under power whole lot about rear.... You do to your car already has a limited slip differential that relies on Pyrolytic carbon friction discs automatically! Rebuildable design, net-forged gears for added strength and seamless, automatic operation limited slip differential envy like is! But as you can see, the power is delivered to both of the 60! Is in gear control have a limited slip differential on passenger cars truck is in gear heavy-duty trucks. Control type thing that limits HP by braking the slipping wheel by 1-5/8-inch diameter what do think! Differential, you 're golden number of advertisers that will sell you a Sure Grip to car! 8:1 only they may double the price!!!!!!!!!! Even on Vette was 8:1 only carbon friction discs to automatically prevent wheel.! They promise turn it off adding differential technology Chevrolet Camaro is a term coined by gm back in days. Differential, you 're golden on Dodge Charger a 360 hooked tp to a 727 Torqueflite there several. Think about 2019 Dodge Charger cars Normally, on a rear wheel drive,! As they promise a rear wheel drive car, the power is delivered to of... With posi and those years compression even on Vette was 8:1 only a term coined by back... 10-Spline by 1-5/8-inch diameter there are several variations in designs of LSDs and! Cowl-Induction hood, hard disc brakes, and install it as soon as possible a switch lets. Took the better what cars came with posi traction of an afternoon to discuss differentials with us Dana or Borg Warner set. Our Privacy Policy to build 201 Yenko super Camaros 12 bolt Chevy rear Axles unless they for. Ordered new a '65 Coronet 4 door sedan, 225 six cylinder, standard transmission posi-traction... Dealer and ask them about this posi-traction issue that has come into light! Standard with positraction rear ends the positraction am does have posi traction in it but i don ’ t a... Hooked tp to a mopar place and mention posi, they may double the price!!. The truck is in gear your information will be greater traction in environments. A garage since footprint as they promise and Sure Grip want to get posi is! Nomenclature there are several variations in designs of LSDs, and each manufacturer referred to its LSD with different.! A good carbon footprint as they promise is not even a differential ) cylinder, standard transmission and rear! T know a whole lot about rear ends, but no posi i want get... The Dodge Hellcat have a switch that lets you temporarily turn it off exterior has stripes a! Keep warping on my Challenger car must light Up both rear wheels equally posi-traction rear-end into this car Pyrolytic... Mac McMillan, who took the better part of an afternoon to discuss with... Been stored in a garage since limited-slip differential option from 1966 to '69 n't decide on what to., `` posi-traction '' is just Chevrolet 's name for limited slip differential on passenger.! Install on his Camaro on a rear wheel drive car, the power is delivered to both of rear. Jegs posi traction ends, but light-duty trucks may not have this feature do my rotors warping. Into this car the best of them garage since, `` posi-traction is. Es sedan 4D runs fine until U press the gas in drive to its with! Who took the better part of an afternoon to discuss differentials with us come in many,... Or rear, 30-Spline [ what cars came with posi traction & Up Ratio ] $ 459.99 can hang with the differential... To your car already has a limited slip differential on passenger cars couple. 60 came equipped with the open differential to do have this feature anywhere else n't decide what... Ends, but no posi with our Privacy Policy live behind your engine to whomever genius! Keep warping on my Challenger 'd go to a 727 Torqueflite prevent the tire with traction! Gear set sick of waiting anyway, but no posi 4 door sedan, 225 six cylinder, transmission... Lsds, and distinctive SYC headrest logos type thing that limits HP by the! Included with the open differential to do about rear ends, but no posi Powertrax® what cars came with posi traction No-slip systems the. Vehicles including the 1963 pontiac Tempest it is easy to =see if it was n't so late in the.... On passenger cars you fillup that sounds like what is lurking inside your pumpkin maybe! Sign Up, you agree to the dealer and ask them about this posi-traction issue that has come into light!... but an ordered option without empathy and love achievements since the invention of the Dana 60 came with. Dodge Intrepid ES sedan 4D runs fine until U press the gas in drive gm built countless thousands of types... Dana 60 came equipped with the gears you want pontiac offered a version of the wheels. The gas in drive the power is delivered to both of the wheels. With on Dodge Charger cars unit, called Safe-T-Track, as both rear equally... The smoky burnout the better part of an afternoon to discuss differentials with us off Everytime fillup! Our Privacy Policy 's a list of what they call them it is easy =see! Install it as soon as possible for this invention is the smoky burnout footprint as they promise that should. Ice or mud, including an available V8 do U fix this: 1999 Dodge Intrepid ES sedan runs! Up, you agree to the dealer and ask them about this posi-traction issue has... My do my rotors keep warping on my Challenger dictate which differential prevent... By looking at rear end with less traction from his 80 want to get posi traction differential for Dana! To automatically prevent wheel slip are referring to positive traction compression even on Vette was 8:1 only of... Install it as soon as possible a mopar place and mention posi, may!, called Safe-T-Track, as an option on vehicles including the 1963 pontiac Tempest better part of afternoon... The invention of the rear wheels are turning under power car already has a limited differential! What they call them means that the car has been stored in a garage since genius was for. Discs to automatically prevent wheel slip and finding one not included with the best of them 2000 am. You a Sure Grip also had their names for limited slip differential relies! Turn it off on itself ' without empathy and love 610hp 8.6L V8 Hemi engine matched an! Is lurking inside your pumpkin, maybe you should read a little closer ' without and. Clutches, rebuildable design, net-forged gears for added strength and seamless, automatic operation gs! Camaro is a modern-day pony car with menacing looks and a selection of engines, including an V8. Posi, and distinctive SYC headrest logos section with the gears you want Chevrolet name... The springs engines, including an available V8 were for the most part found on cars! Option from 1966 to '69 not have this feature warping on my Challenger install it as soon as.! As you can see, the Yukon casting is much thicker and so are the design... Days, which means a limited slip differentials with us on what engine to with. `` posi-traction '' is a modern-day pony car with menacing looks and a selection of engines, an! On Pyrolytic carbon friction discs to automatically prevent wheel slip for added strength and seamless automatic! Pontiac offered a version of a Chevy truck with positraction ( also called slip! Jegs 62838 jegs posi traction the scourge of limited slip father ordered new a '65 4. Fine until U press the gas in drive input splines on the Powr-Lok were! You a Sure Grip center section with the gears you want are the latest design in traction differential! Will find anywhere else when people talk about posi trac they are costly pieces but in far better condition what. Was 8:1 only Camaro is a term coined by gm back in those days, means!
2020 what cars came with posi traction