Suspension Control Arm Bushings = Rear Diff Bushings?

Bill Cool

Previously 87MustangGT
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Nov 18, 1999
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This is likely a stupid question, but just to make sure - are rear control arm bushings the same as "rear differential bushings?" I'm trying to replace all bushings on my 87, but I can't find diff bushings (needed per the mechanic who recently worked on her) anywhere...everything see points to upper control arms being it. Same thing?
 
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MFE92

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Just in case that answer doesn't totally clear it up for you, no, the rear control arm bushings are not the same as the "differential bushings". The lower control arms have bushings pressed into both ends. The upper control arms have bushings pressed into them on their front ends, but the bushings for the rear of the upper arms are actually mounted in the differential housing and the arms mount to those.
 

94GTCoupe

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Sharad

ALWAYS choose the V over the P!!! Wait... what?
Jan 5, 2011
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This is likely a stupid question, but just to make sure - are rear control arm bushings the same as "rear differential bushings?" I'm trying to replace all bushings on my 87, but I can't find diff bushings (needed per the mechanic who recently worked on her) anywhere...everything see points to upper control arms being it. Same thing?

Everybody has covered your question pretty well. So I'll just mention this- have your mechanic check your torque boxes very well when he swaps your bushings. (torque boxes are where the control arms bolt in on the body side)
 

Bill Cool

Previously 87MustangGT
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Nov 18, 1999
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The link 5L5 posted doesn't show the need for a tool... I know two of you said to get the tool, vs. his one vote for not using it (or rather, abstention from voting!)...is it really that much better? And/or, either of you want to sell yours?! :)

Sharad, thanks for the heads up. I'll be tackling the install, and will do some research to refamiliarize myself with the torque boxes. Years ago I would've been able to tell whether they were shot or not, but it's been a while now.
 
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94GTCoupe

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That link (my write up) is for poly bushings, which reuse the factory rubber bushing shells.
That's why the tool wasn't used, as it will press the entire bushing, shell included, out of the housing ear.

I won't be sellling my tool, but I do recommend it.
I used it to install a set in my housing, and remove and install a set in my buddies housing when we rebuilt his rear end.

Just use plenty of antiseize on the threads and it'll work flawlessly.
 

Mustang5L5

That is…until I whipped out my Bissell
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The link 5L5 posted doesn't show the need for a tool... I know two of you said to get the tool, vs. his one vote for not using it (or rather, abstention from voting!)...is it really that much better? And/or, either of you want to sell yours?! :)

Sharad, thanks for the heads up. I'll be tackling the install, and will do some research to refamiliarize myself with the torque boxes. Years ago I would've been able to tell whether they were shot or not, but it's been a while now.

Having installed those bushings in the link I posted....you need the tool.

A SN member here was kind enough to loan me his if i paid shipping both ways. Those bushings are a PITA to install without the tool.
 

Bill Cool

Previously 87MustangGT
Founding Member
Nov 18, 1999
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Seymour, CT
Having installed those bushings in the link I posted....you need the tool.

A SN member here was kind enough to loan me his if i paid shipping both ways. Those bushings are a PITA to install without the tool.
Fair enough, thank you for the heads up! I will get one, one way or another. I've already asked a member to borrow his...but if that falls through, I might be asking you to ask your guy :D
 

Mustang5L5

That is…until I whipped out my Bissell
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I personally wouldn't run polyurethane bushings on the upper arms. When i redid my rear suspension, i took the advice of Max Motorsports tech and left my differential and upper control arm bushings rubber when i installed my Max motorsports LCA's. The reason being the rubber bushings prevent bind when the axle articulates.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
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My personal recommendation (and i'm sure you'll get a lot of opinions) is like the setup I run.

My car is a street/weekend car. I just cruise so no hard racing.

I have Max motorsports LCA's with poly bushings. Brand new rubber ford bushings in the differential, and a set of Steeda OEM boxed upper control arms with rubber bushings as my uppers. Basically poly on the lowers, but rubber on the uppers.