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Suspension & Braking Forum by BimmerWorld
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Old 03-18-2013, 05:51 PM   #41
EricSMG
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Why would you change the diff bushings on their own? Changing RTAB's on their own is one thing, but if you had enough kays to get a clunk out of Diff Bushings wouldn't it just be easier to do the whole subframe?

I'm curious because I'm about due for a sub-frame, my Diff bushings and RTAB's are shagged, but if they're easy to do on their own I might be lazy and just do that.
Good question. The answer is that the other bushings were "fine." In fact, even my front diff bushings were fine, with only the rear failing. It was bad enough to produce a loud thud with every gear change. Not good. So I fixed what was broken.

To do the rear subframe would be more work, tools and time. And if you're gonna do that you might as well do all 8 control arm bushings.. more work, tools and time. And wheel bearings.. more work tools and time..

I corrected the problem and the car feels great now. No need to go ape **** on it.
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Old 03-18-2013, 06:07 PM   #42
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Fair enough, so it wasn't too difficult to get to the bushings without dropping anything out of the car?


And yeah... those Z-axles have a completely ridiculous amount of bushings on them ahahaha.
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Old 03-18-2013, 06:11 PM   #43
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Honestly i'd rather just buy the tools from Eric's amazon link than research this. LOL

I know you were helping me out and I thank you. Calm down, hip hop boy

My question goes for both of you and Ryanel
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Old 03-18-2013, 06:12 PM   #44
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OP, great job. I never got this job priced. What an average quote if you had to get it done?
I plan on doing it myself btw.
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Old 03-18-2013, 08:37 PM   #45
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Fair enough, so it wasn't too difficult to get to the bushings without dropping anything out of the car?
Well you absolutely have to drop the diff for the front two. I've heard of others avoiding this for the rear bushing, but I can't see how without getting really frustrated. There's just not enough room with the diff still in the car. But, you do not have to remove the subframe or any of the control arms.
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Old 03-19-2013, 12:16 AM   #46
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Yeah the 8 CA bushings and subframe bushings are a whole lot more work. That will require a full day at least with the right tools. I might as well start collecting the tools and bushings. For now though, everything seems really solid back there. The high wear item is the RTAB. I plan on replacing mine every 20k
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Old 03-19-2013, 06:05 PM   #47
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Mango, even for you, 20k is a bit ridiculous?

My RTAB's and Diff bushes are shagged at 110,000 miles so I figure I should just go and do all of it.
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Old 03-19-2013, 06:39 PM   #48
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Yeah the 8 CA bushings and subframe bushings are a whole lot more work. That will require a full day at least with the right tools. I might as well start collecting the tools and bushings. For now though, everything seems really solid back there. The high wear item is the RTAB. I plan on replacing mine every 20k
Just use AKG 80A or Powerflex and save yourself the trouble.
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Old 03-19-2013, 07:28 PM   #49
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Just use AKG 80A or Powerflex and save yourself the trouble.
I'm running the 80A rtabs (street only version) on the 46M and they're awesome. They feel just like stock, which is what I wanted. I'll definitely throw them in the 330 when it needs them. I will say, though, that the new split-shell style OEM rtab is pretty robust and should last quite a while. I ran a set on my 46M for about 25k miles and they still felt new.
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