Quick question about True-trac posi..
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From: GO PACK GO
Car: 83Z28 HO
Engine: Magnacharged Dart Little M 408
Transmission: G Force 5 speed
Axle/Gears: Moser 9" w/Detroit Trutrac
Quick question about True-trac posi..
For a little history – I installed a Moser 9” rear in my car a few weeks ago. It has a nodular iron center section, 31 spline alloy axles, Daytona spicer, and Moser gears with a Detriot True-trac posi and Explorer 11” drums.
Is it normal for the inside rear tire (i.e. right rear when making a right turn) to squeal when making sharp turns? It does it on the other rear tire too when making a left turn.
Other than that, I really have no complaints, no loud whining, clunking or anything. I’m thinking it may be normal since I don’t seem to have any other weird things going on…
Is it normal for the inside rear tire (i.e. right rear when making a right turn) to squeal when making sharp turns? It does it on the other rear tire too when making a left turn.
Other than that, I really have no complaints, no loud whining, clunking or anything. I’m thinking it may be normal since I don’t seem to have any other weird things going on…
Thread Starter
Supreme Member
iTrader: (4)
Joined: Oct 1999
Posts: 4,211
Likes: 3
From: GO PACK GO
Car: 83Z28 HO
Engine: Magnacharged Dart Little M 408
Transmission: G Force 5 speed
Axle/Gears: Moser 9" w/Detroit Trutrac
Is it normal for the inside rear tire (i.e. right rear when making a right turn) to squeal when making sharp turns? It does it on the other rear tire too when making a left turn.
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Joined: Nov 2002
Posts: 474
Likes: 15
From: Washington State
Car: '84 Berlinetta
Engine: ZZ4
Transmission: BTOD stage 3
Axle/Gears: 3.23 posi disc
First, look at the function of the Truetrac. It is not strictly a limited slip device, it is closer to a locker in function. In low traction circumstances, one tire will try to spin faster than the other, and the truetrac will lock up using a gear driven system (non-clutch) to allow for no differention between the wheels. In a turn, the inner wheel spins slower than the outer wheel to account for the difference in distance. This means that the truetrac must allow one wheel to spin at a different speed. To do this, it uses centrifugal gears that are forced into position during a turn that prevent lockup.
In a parking lot, when the centrifugal force is limited by speed, the rear end will still lock up, causing both rear wheels to spin at the same speed, which in a turn means that the inner one will be peeling or the oujter wheel will drag. It is a normal function of a locker. Hope this helps.
In a parking lot, when the centrifugal force is limited by speed, the rear end will still lock up, causing both rear wheels to spin at the same speed, which in a turn means that the inner one will be peeling or the oujter wheel will drag. It is a normal function of a locker. Hope this helps.
Thread Starter
Supreme Member
iTrader: (4)
Joined: Oct 1999
Posts: 4,211
Likes: 3
From: GO PACK GO
Car: 83Z28 HO
Engine: Magnacharged Dart Little M 408
Transmission: G Force 5 speed
Axle/Gears: Moser 9" w/Detroit Trutrac
Originally posted by Berlinetta00
First, look at the function of the Truetrac. It is not strictly a limited slip device, it is closer to a locker in function. In low traction circumstances, one tire will try to spin faster than the other, and the truetrac will lock up using a gear driven system (non-clutch) to allow for no differention between the wheels. In a turn, the inner wheel spins slower than the outer wheel to account for the difference in distance. This means that the truetrac must allow one wheel to spin at a different speed. To do this, it uses centrifugal gears that are forced into position during a turn that prevent lockup.
In a parking lot, when the centrifugal force is limited by speed, the rear end will still lock up, causing both rear wheels to spin at the same speed, which in a turn means that the inner one will be peeling or the oujter wheel will drag. It is a normal function of a locker. Hope this helps.
First, look at the function of the Truetrac. It is not strictly a limited slip device, it is closer to a locker in function. In low traction circumstances, one tire will try to spin faster than the other, and the truetrac will lock up using a gear driven system (non-clutch) to allow for no differention between the wheels. In a turn, the inner wheel spins slower than the outer wheel to account for the difference in distance. This means that the truetrac must allow one wheel to spin at a different speed. To do this, it uses centrifugal gears that are forced into position during a turn that prevent lockup.
In a parking lot, when the centrifugal force is limited by speed, the rear end will still lock up, causing both rear wheels to spin at the same speed, which in a turn means that the inner one will be peeling or the oujter wheel will drag. It is a normal function of a locker. Hope this helps.
I've had limited slip rears, so I kept thinking it was supposed to act like that. I figured it would only "lock" when there was enough torque applied, but making left/right turns at intersections I've heard a tire squeeling and didn't think of that!
- I just got back from taking it out again, and it seems sometimes the outer wheel on a turn will sqeel occasionally too!! Guess I gotta get used to it. Only have maybe 70 miles on both the engine and rear....but it's runnin like a raped ape now!!! Has awesome power....... yet unrefined! lol
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