differential cover bushings available separately?

[nextelbuddy]

i am doing a refresh of the rear end in my wagon project. want a smooth daily driver ride (my red sedan has all AKG red 75d poly subframe/diff with AKG monoball rtab and AKG FCABs) on the wagon project im going to be running brand new BMW subframe bushings with Synchro design rtab. I wanted to run brand new BMW diff bushings but can only find the part# for the front forward diff busing in the axle carrier. i cant seem to find the ones in the diff cover other than buying a brand new cover. is that correct? you have to buy a whole new cover just to get new OE diff cover bushings?

[jayjaya29]

E36M3 diff bushings are a direct fit with a press.

[nextelbuddy]

E36M3 diff bushings are a direct fit with a press.

so you can purchase e36 m3 rear diff cover bushings (which are a direct fit to the e46 m3 cover) separately but not the e46 m3 ones. got it.

[Obioban]

e36 ones are softer, so a performance downgrade (probably NHV upgrade).

If you want new stock, the only option is a new cover. Other than the e36 bushings, everything you can press in in place of stock is a huge NHV penalty.

[nextelbuddy]

I understand. Thank you for the explanation

[MathewM3]

I use AKG bushings. Works great and easy to install.

[ugaexploder]

I use AKG bushings. Works great and easy to install.

Same here, I'm on the 95A ones and no noticeable NVH at all.

[9kracing]

Same here, I'm on the 95A ones and no noticeable NVH at all.

You have zero gear whine?

What subframe bushings are you running?

[discoelk]

Poly diff with poly subframe has almost no whine in my experience. I used Revshift subframe and ECS diff in my old car.

Sorry for off-topic, OP.

[Tbonem3]

Dubious claim. I had a significant increase in whine, but am fine with it as it's most pronounced at freeway speeds I seldom use, plus I added more sound insulation under rear bench. I'm perfectly happy with the AKG, mind.

[ugaexploder]

You have zero gear whine?

What subframe bushings are you running?

PSM solid

[maw1124]

e36 ones are softer, so a performance downgrade (probably NHV upgrade).

Has anyone measured this? What makes us think they’re softer?

maw

[0-60motorsports]

Has anyone measured this? What makes us think they’re softer?

maw

This. I have been using them for years LOL

[Obioban]

Yes, someone measured them back on m3f.

[maw1124]

Interesting… I got them as a clunk riddance device because they were plug and play fit. Dayenu. I had no idea there was a difference in material. I wonder why. Most engineers would simply carry over the part.

maw