Replaced Differential Bushings

cewrx7r1 · 09-19-2008, 07:31 PM

The Pettitt http://www.pettitracing.com/rx7/index_suspension.htm
urethane diff bushings are quiet "almost like stock" but are also stiffer.
I just installed them Tuesday and really like them.

As others have reported, breaking the 4 nuts on top of the diff is the difficult task. Since I am a small person and do not have super strength, I gave up on the normal methods after a while. I did not want to remove the drive shaft and PPF which would allow rotation of the diff for better access. My remedy was a 2 ton capacity wire cable winch, AKA a come-along.

I conneted the winch end to the side of the frame cross member and the doubled up cable end around my wratchet or box end wrench. The cable was routed as to pull straight as posible. It worked as I thought it would, easy.

Brent · 09-21-2008, 03:18 AM

Great tip! How long did it take to install them?

cewrx7r1 · 09-21-2008, 09:42 AM

4 hours not counting the time to go buy the Come-Along and take the diff brace to a shop to change out the bushings. This includes jacking up the car, putting jack stands under it, and removing the rear wheels, and reversing this.

09-19-2008, 07:31 PM	#1
cewrx7r1 The Judge Join Date: Feb 2008 iTrader: (0) Posts: 196 Rep Power: 17	Replaced Differential Bushings The Pettitt http://www.pettitracing.com/rx7/index_suspension.htm urethane diff bushings are quiet "almost like stock" but are also stiffer. I just installed them Tuesday and really like them. As others have reported, breaking the 4 nuts on top of the diff is the difficult task. Since I am a small person and do not have super strength, I gave up on the normal methods after a while. I did not want to remove the drive shaft and PPF which would allow rotation of the diff for better access. My remedy was a 2 ton capacity wire cable winch, AKA a come-along. I conneted the winch end to the side of the frame cross member and the doubled up cable end around my wratchet or box end wrench. The cable was routed as to pull straight as posible. It worked as I thought it would, easy.

09-21-2008, 03:18 AM	#2
Brent Sua Sponte Join Date: Feb 2008 Location: Killeen, TX iTrader: (4) Posts: 839 Rep Power: 17	Great tip! How long did it take to install them? __________________ Road Atlanta August 2011 NASA TT 1:33 http://www.youtube.com/watch?v=IFY00PAK_Ps Traqmate's video of my car from the 2011 UTCC at VIR http://www.youtube.com/watch?v=2Zcn6...layer_embedded Video of Yellow LS1 FD at NASA TT at VIR http://www.youtube.com/watch?v=e6k0lJkcwrM

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09-21-2008, 09:42 AM	#3
cewrx7r1 The Judge Join Date: Feb 2008 iTrader: (0) Posts: 196 Rep Power: 17	4 hours not counting the time to go buy the Come-Along and take the diff brace to a shop to change out the bushings. This includes jacking up the car, putting jack stands under it, and removing the rear wheels, and reversing this.