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      03-10-2012, 08:53 PM   #1
HaiDef
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RTAB

Well, I looked at my tires today and my rear right passenger shows wire on the inside. I looked it up and it appears that my RTAB are worn out. Anybody have any good recommendations for some? I was looking at rogue engineering.

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      03-10-2012, 08:54 PM   #2
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and if someone has a DIY...I only saw transmission mount DIY in the DIY section
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      03-11-2012, 01:40 AM   #3
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Could be your alignment as well, too much toe. How many miles do you have?
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      03-11-2012, 10:31 AM   #4
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      03-11-2012, 10:39 AM   #5
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I have 32k miles on my car..
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      03-11-2012, 11:24 AM   #6
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Quote:
Originally Posted by Hdoan86 View Post
I have 32k miles on my car..
At that mileage, I would suggest alignment is more likely problem than worn RTABs, unless the RTAB is physically damaged due to impact or a manufacturing defect.
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      03-13-2012, 08:59 AM   #7
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I know this is a long shot...but does anyone in Houston have the bushing tool I can borrow? I tried calling autozone and orielly for rentals already.
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      03-13-2012, 10:43 AM   #8
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Quote:
Originally Posted by Hdoan86 View Post
I know this is a long shot...but does anyone in Houston have the bushing tool I can borrow? I tried calling autozone and orielly for rentals already.
Might ask on the Houston BMW CCA forum.
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      03-13-2012, 10:54 AM   #9
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I had the same problem with my car at 21000 miles. I had the alignment checked, and everything was fine. Does anyone have a link for further info on RTABs (IDK even what they are) Thanks!
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      03-13-2012, 11:00 AM   #10
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Quote:
Originally Posted by mshanno1 View Post
I had the same problem with my car at 21000 miles. I had the alignment checked, and everything was fine. Does anyone have a link for further info on RTABs (IDK even what they are) Thanks!
Rear Trailing Arm Bushings
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      03-13-2012, 06:27 PM   #11
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Quote:
Originally Posted by mshanno1 View Post
I had the same problem with my car at 21000 miles. I had the alignment checked, and everything was fine. Does anyone have a link for further info on RTABs (IDK even what they are) Thanks!
Z4M Rear Axle Camber, Toe Adjust




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      03-13-2012, 06:32 PM   #12
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Quote:
Originally Posted by Hdoan86 View Post
I have 32k miles on my car..
how many miles on the actual tire?
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      03-14-2012, 10:15 AM   #13
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around 15k on the tire
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      03-14-2012, 10:33 AM   #14
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Quote:
Originally Posted by Hdoan86 View Post
around 15k on the tire
imho you may have rtab issues, but it looks like more camber wear than anything. rtab wear usually affect the tire as a whole because the actual bushing is flexing and causes the tire to "toe in" and "toe out" at excessive angels. This would show in the overall tire; and on some cars, even wear tires very rapidly. see below:

http://forum.e46fanatics.com/showthread.php?p=11250499

also note that his excessive wear came from the outside->inside.
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      03-14-2012, 08:01 PM   #15
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Good read, thanks! I was just planning on doing everything right the first time. RTAB replacement along with alignment and new tires. It would suck to do alignment to find out bushings are shot to changing bushings and then getting another alignment after bushings. Around $200 plus some elbow grease. Should be a fun learning experience
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      03-14-2012, 11:48 PM   #16
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yeah, sounds like a plan. probably get aftermarket (stronger) bushings along with the rtab limiters as well while your in there.

http://www.akgmotorsport.com/catalog...og.php?item=34
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      11-24-2013, 09:44 PM   #17
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I would like to do this RTAB myself after watching a lot of E46 video posting on youtube.

However, there is the Z4M rear splash guard is in the way and no video on it.

Can someone have good drawing / instruction on how to remove the rear splash guard without damaging it?
Thanks
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      11-25-2013, 05:18 AM   #18
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Quote:
Originally Posted by OG_M3 View Post
yeah, sounds like a plan. probably get aftermarket (stronger) bushings along with the rtab limiters as well while your in there.

http://www.akgmotorsport.com/catalog...og.php?item=34
Why add two limiters to an existing RTAB? Why not just install an RTAB that is an intergrated unit, like the Bimmerworld one's?

http://store.bimmerworld.com/powerfl...-rtab-p91.aspx

Quote:
Originally Posted by S2000 View Post
I would like to do this RTAB myself after watching a lot of E46 video posting on youtube.

However, there is the Z4M rear splash guard is in the way and no video on it.

Can someone have good drawing / instruction on how to remove the rear splash guard without damaging it?
Thanks
It's a two piece unit. Just remove the 8mm screws and one plastic fenderwell nut. Both just comes off to allow access to the RTAB.

http://www.realoem.com/bmw/showparts...52&hg=51&fg=75

With the proper removal tool, it took approx. 45min a side to replace and install new RTAB's.
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      11-05-2015, 08:21 AM   #19
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For those who have installed limiters, I have read that with limiters installed the bushing will rotate under force when installed so there is no need to do the pre-load positioning of the bushing in the carrier. Does this sound correct?

Lastly, if someone could point me to the pre-loading instructions in the online TIS manual I'd greatly appreciate it (http://workshop-manuals.com/bmw/). I can never find things in there.
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      11-05-2015, 09:19 AM   #20
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With OE RTABs to set the preload, you jack up the trailing arm to the normal position as if the car was on the ground.
Then tighten everything up.
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      11-05-2015, 10:12 AM   #21
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Quote:
Originally Posted by inTgr8r View Post
With OE RTABs to set the preload, you jack up the trailing arm to the normal position as if the car was on the ground.
Then tighten everything up.
But you can't fully tighten the center bolt after carrier is bolted to the car.

I'm leaning towards one of these two methods:
1. Install but don't fully tighten bushing to carrier
2. Raise wheel assembly to ride height
3. Bolt carrier to car
4. Unbolt carrier and mark position of bushing to carrier
5. Jam something between carrier and RTA to maintain position of carrier relative to RTA while tightening center bolt to 81 ft/lb
6. Bolt carrier to car

a. When lowering old bushing, mark position of carrier relative to RTA
b. steps 5 and 6 as above
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      11-05-2015, 10:35 AM   #22
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It's been a while for me, I went with poly the last time (no preload)

With the RTAB up in position, can you not get to it with a spanner to tighten it, ( to hold position);
Then lower it to torque?
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