Cus'n Vinney - What posi in this car? ?
10-29-2007, 09:31 AM
#1
TECH Veteran
Thread Starter
Join Date: Aug 2002
Location: Hartsdale, NY
Posts: 4,055
Likes: 0
Received 0 Likes
on
0 Posts
Cus'n Vinney - What posi in this car? ? Camaro SS 1999
...when both wheels are off the ground I spin one wheel forward and the other wheel moves backward. The car was in gear when this test was done.
Anyway, recently one tire was in a wet flower bed on a hill and the other tire was on dry pavement (my driveway). Neither tire would grip!
I thought if one wheel was in mud, a posi was supposted to switch the torque to the other wheel (A.K.A. info from the My Cusin Vinnie flick)
Is this posi burned out? I removed the 10-bolt cover and found clean gear oil (no apparent clutch material) and no busted parts stuck to the magnet.
...car runs fine with no noises, etc.
...when both wheels are off the ground I spin one wheel forward and the other wheel moves backward. The car was in gear when this test was done.
Anyway, recently one tire was in a wet flower bed on a hill and the other tire was on dry pavement (my driveway). Neither tire would grip!
I thought if one wheel was in mud, a posi was supposted to switch the torque to the other wheel (A.K.A. info from the My Cusin Vinnie flick)
Is this posi burned out? I removed the 10-bolt cover and found clean gear oil (no apparent clutch material) and no busted parts stuck to the magnet.
...car runs fine with no noises, etc.
10-29-2007, 09:41 AM
#2
Moderator
iTrader: (11)
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,605
Likes: 0
Received 6 Likes
on
6 Posts
Torsen will act this way, it splits torque but zero times whatever
(zero back-torque on the other side) doesn't engage the thing.
If you have the cover off then the construction ought to be
evident?
(zero back-torque on the other side) doesn't engage the thing.
If you have the cover off then the construction ought to be
evident?
10-30-2007, 12:29 PM
#6
i always understood these two to be the same...though i never really got into the design of either, more their use in applications (ie road racing) where six of one is a half dozen of the other i guess
10-30-2007, 01:13 PM
#7
14 Second Truck Club
iTrader: (36)
Join Date: Oct 2004
Location: Chicago, Il
Posts: 2,633
Likes: 0
Received 0 Likes
on
0 Posts
Posi is just a brand name that GM uses, it is not a type of differential. Torsen, Auburn, Eaton, True-trac, etc are all limited slip differentials. If they are used in GM vehicles from the factory then I guess you could call it a posi.
No different than Trak-lok or Powr-lock for Dana, Trac-loc for Ford, Sur-grip for Dodge, etc. (I may have misspelled some of those, but you get the point)
No different than Trak-lok or Powr-lock for Dana, Trac-loc for Ford, Sur-grip for Dodge, etc. (I may have misspelled some of those, but you get the point)
Trending Topics
10-30-2007, 04:51 PM
#10
TECH Veteran
Thread Starter
Join Date: Aug 2002
Location: Hartsdale, NY
Posts: 4,055
Likes: 0
Received 0 Likes
on
0 Posts
...neighbors dont give a rats butt for my flowers but my wife will complain if 275/40 17 tire tracks are seen. If two burn-out tires tracks are found, I will shurely get blamed since she has seen the "Cuz Vinny" movie 12 times.
Every time this happens, I blame the FedEx man who she now hates, however!
Every time this happens, I blame the FedEx man who she now hates, however!
10-30-2007, 09:32 PM
#11
Tech Resident
A posi means the inside of the carrier has clutches and when you spin one wheel, the other wheel will turn in the same direction. The Torsen is driven by worm-gears and when you spin one wheel, the other will spin in the OPPOSITE direction.
The cars that came with Auburn units are posi rears. They'd be the LT1 cars and a few of the LS1's with "high performance" rears. Most came with Zexel-Torsen limited-slip non-posi rears (G80 door code).
11-02-2007, 12:51 AM
#13
Tech Resident
Depends what you consider "the good rear end." There are advantages to each differential. The Auburn is marginally better for the track but the Torsen is much better for cornering.
If you have a G80 door code, your car came stock with a Torsen. If there's no G80, you have an Auburn.
If you have a G80 door code, your car came stock with a Torsen. If there's no G80, you have an Auburn.
