Allen Romine
Member
Just wondering what a posi-unit from a 489 case in a 65 8 3/4 rear end might be worth. Went with a strange dana 60. i have pictures of it i can send in e-mail. Thanks in advance. Allen
Posi-unit
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tnfastback
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I got this!
So you're a former chevy owner? Or maybe still own one?
Posi is a GM term. Sure Grip is the unit Chrysler uses. Don't let it happen again!
To answer your question they go for $500 on up depending on the condition. Check out ebay for current prices.
So you're a former chevy owner? Or maybe still own one?
Posi is a GM term. Sure Grip is the unit Chrysler uses. Don't let it happen again!
To answer your question they go for $500 on up depending on the condition. Check out ebay for current prices.
Allen Romine
Member
Yea i am a chevy guy. i built a 65 plymouth satellite for my grandson to race that was left to him by his other grandad.I got this!
So you're a former chevy owner? Or maybe still own one?
Posi is a GM term. Sure Grip is the unit Chrysler uses. Don't let it happen again!
To answer your question they go for $500 on up depending on the condition. Check out ebay for current prices.
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*sniff* You make me so proud! *sniff*
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Any pics? Sounds like a great project.
It would also depend on whether it’s a clutch or cone type sure grip. Normally 489’s would have a cone type, but this is 50 years later. My 489 case in my 65 has a clutch type which I think is worth slightly more.
66Satellite47
Well-Known Member
Pretty sure a 489 would have the clutch style limited slip. Thought cone style came in with 741/742. Could be wrong. I prefer the clutch type myself.
No idea what just the limited slip diff is worth, maybe 50% of cost of new one. Dr Diff has them new for $395.
bigaadams
Well-Known Member
sure as I saw that posting title I knew the word war had just begun......lol A list of a few variables out there.....
- Alfa Romeo: Q4, Q2
- Audi: Quattro, Quattro with Sport Differential (rear axle)
- American Motors: Twin-Grip
- Buick: Positive Traction. Gran Sport models used the term "Limited-slip (differential)"
- Cadillac: Controlled
- Chevrolet/GMC: Positraction
- Chrysler: Sure Grip
- Dana Holding Corporation:Trak-Lok or Powr-Lok
- Ferrari: E-Diff
- Fiat, Lancia: Viscodrive
- Ford: Equa-Lock and Traction-Lok
- Hyundai: HTRAC
- International: Trak-Lok (clutches only) or Power-Lok (clutch and ramping engagement process)
- Jeep: Trac-Lok (clutch-type mechanical), Tru-Lok (gear-type mechanical), and Vari-Lok (gerotor pump), Power Lok
- Lincoln: Directed Power
- Maserati: Equ-Tor
- Nissan: GT LSD
- Oldsmobile: Anti-Spin
- Pontiac: Safe-T-Track
- Porsche: PSD (electro-hydraulic mechanical), Porsche Torque Vectoring/Plus (PTV/Plus, combined electro-hydraulic mechanical and brake-based type; rear axle only)
- Saab: Saab XWD eLSD
- Studebaker-Packard Corporation: Twin Traction
- Toyota: LSD
- TVR: Hydratrak
- Yukon Gear & Axle: Duragrip
- Mercedes: ASD, AMG Rear-Axle Differential Lock (active differential on select FR-based AMG/S models; pure mechanical variant also present on select non-S AMG models)
383man
Well-Known Member
Where I come from they were all called posi units and thats what us Mopar guys and Ford guys also called them. Thats like the six pack and six barrel as I call all of them six packs and dont care about it being manufactor correct. Ron
I agree, Ron. If you know what the other guy means when he says 'posi' unit or 'posi-trac', who cares? If you're writing a thesis or book, it's important to get it right, otherwise, chill... JMO
66Satellite47
Well-Known Member
You are correct, brain fade on my part.
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