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04-11-2009, 06:41 PM
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#1
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Join Date: Nov 2008
Location: Marlton
Posts: 578
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car vs truck rear end
I think I know the answer to this, but just making sure all is well in my truck...
When I had my trans am, both rear wheels would turn if one wheel was loosing traction. In my truck, if the passenger side looses traction, it spins, then there is a violent clunk, then the driver side tire chirps and i'll start moving. The rear ends work differently in both cars right? I know the truck has a locking differential, but their both considered posi, even though they work differently?
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04-11-2009, 06:44 PM
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#2
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BadMod
Join Date: Aug 2004
Location: hamilton, nj
Posts: 8,889
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no, they should work the same, the difference in feeling might be from the different traction control systems in the 2 vehicles
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Mercerville MotorSports, LLC
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04-11-2009, 06:59 PM
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#3
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Join Date: Nov 2008
Location: Marlton
Posts: 578
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its the big clunk part that makes me nervous. The trans am was so smooth about it, whereas the truck is noisy and violent when the driver side rear starts moving
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04-11-2009, 07:00 PM
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#4
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12 Second Club
Join Date: Mar 2009
Location: metuchen, nj
Posts: 1,476
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is it only the driver side that does that?
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04-11-2009, 07:09 PM
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#5
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Join Date: Nov 2008
Location: Marlton
Posts: 578
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passenger side will spin b/c of no traction, then there will be a clunk from the rear, and the driver side wheel will kick in. I noticed when i was pulled over the other day, , the passenger side was on the grass, and the driver was on the pavement. When i began to go the passenger side spun, so it made that clunk and the driver side started spinning.
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04-11-2009, 07:16 PM
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#6
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Co-Founder / Site Admin
Join Date: Jul 2004
Location: Ewing, NJ
Posts: 22,476
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Sounds like the truck has a locker, while the car has a limited slip differential. They both work to provide power to the rear wheels equally, however while the limited slip allows for some slippage side to side, the locker basically acts like a spool with an on-off switch.
Here's some explanation for the different types of differentials: http://www.offroaders.com/tech/limit...ferentials.htm
- Justin
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04-11-2009, 08:41 PM
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#7
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Join Date: May 2005
Location: under a roof
Posts: 2,034
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The clunk is normal, mine does it too.
Edit- it only does it when I drive like an idiot! It does not make any noise under regular driving circumstances.
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Last edited by mc73nova; 04-11-2009 at 08:42 PM.
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04-12-2009, 01:05 AM
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#8
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Join Date: Nov 2007
Location: Jackson, NJ
Posts: 1,749
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i know the truck you have has a P80 diff in it which when your losing traction i.e. burnout, once you go over 2000 rpm it only spins one wheel but if you shift losing traction and upshift the deff locks back to both wheels, this causes the diff to often break
sorry if this is not really english im a little not sober
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Quote:
Originally Posted by Jersey Mike
Seven.
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04-12-2009, 06:24 AM
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#9
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Join Date: Dec 2008
Location: Chatham, NJ
Posts: 366
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Quote:
Originally Posted by wretched73
sorry if this is not really english im a little not sober
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epic qoute
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04-12-2009, 07:15 AM
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#10
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13 Second Club
Join Date: Feb 2007
Posts: 875
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Quote:
Originally Posted by cbrrmike
no, they should work the same, the difference in feeling might be from the different traction control systems in the 2 vehicles
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wrong. he probably has an eaton G80 locker. most all new GM trucks have it. when one tire slips more then 10% of the other, it automatically and mechanically locks the rear into a full locked mode. the clunk and side-shifting you feel is normal. my truck does it. do a search on youtube for g80 vids. heres one:
http://www.youtube.com/watch?v=p8nAbg5suFw
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