Differential Housing Bushings?

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mguerci

Apprentice
Aug 30, 2006
56
1
8
Columbia, SC
I am rebuilding the suspension on my 78 GP. I was planning on replacing the rear control arm bushings with poly bushings (i.e. ENS-3132G from Summit). Do I need separate diff housing bushings? (i.e. UPI-3000-B from Summit) All of the poly bushing sets have 4 pairs of bushings so wouldn't that cover it?
 
On the upper arms the rear bushing is mounted to the housing, not the trailing arm. All the others are mounted to the arms.
 
Ok. Let me see if I'm understanding correctly.
1. There are 2 arms (upper and lower).
2. On the lowers the bushings are mounted in both ends of the arm.
3. On the upper, bushings are only mounted in the frame end.
4. On the axle end of the uppers, the busing is mounted in the axle housing.

This is what I thought originally, and why I wasked the question originally. Most of the rear arm bushing sets (Energy Susp, Prothane, etc) have 4 pairs of bushings. I'm trying to figure out if the 4th pair fits in the housing or its extra and I need to get the bushings specifically for the housing in addition. If no one knows, I'll just give the vendors a call.
 
mguerci said:
Ok. Let me see if I'm understanding correctly.
1. There are 2 arms (upper and lower).
2. On the lowers the bushings are mounted in both ends of the arm.
3. On the upper, bushings are only mounted in the frame end.
4. On the axle end of the uppers, the busing is mounted in the axle housing.

This is what I thought originally, and why I wasked the question originally. Most of the rear arm bushing sets (Energy Susp, Prothane, etc) have 4 pairs of bushings. I'm trying to figure out if the 4th pair fits in the housing or its extra and I need to get the bushings specifically for the housing in addition. If no one knows, I'll just give the vendors a call.

Yeah the 4th pair should go in the housing. I just bought new edelbrock arms and the lowers have the bushings installed. The uppers have the frame end installed and came with a set to go into the housing. The bushings were already installed on the arms so I can't tell you if they are the same as the rear end ones for sure. But they looked the same.
 
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