[paul223]

I upgraded rear diff bushings to Powerflex street version.

Symptoms - gear shifts felt lazy and rubbery. Clunk jolt/jerk from 2 to 1 gear when coming to stop. When accelerating, response of yourself hitting back of seat was not there.
2013 535i 53xxx miles. PS2 plus full bolt ons.
I also changed diff oil. I followed YouTube diy videos. There are 2. Both show good info.

After installation- nvh is like oem, gear shifts are crisp and acceleration is immediate. Now car is more fun to drive again.
I suggest powerflex over oem. Powerflex bushings can with installed by hand pressing.

Pics of old oem bushings, oil, and special tools.
Now I don't need special tools so I will sell both. We can keep passing these tools to one member to another.

[Unspec]

I wonder how much of the clunking/jerking fix was due to the oil change versus changing out the bushings.

[paul223]

Originally Posted by Unspec

I wonder how much of the clunking/jerking fix was due to the oil change versus changing out the bushings.

It was there mainly due to bushings. Oil probably helped 5% max.

[BimmerHausPerformance]

Wow those look like they are in poor shape for only 53k miles. Makes me wonder what mine look like!

Link to the bushings?

[paul223]

Originally Posted by BrowBMW

Wow those look like they are in poor shape for only 53k miles. Makes me wonder what mine look like!

Link to the bushings?

Originally Posted by BrowBMW

Wow those look like they are in poor shape for only 53k miles. Makes me wonder what mine look like!

Link to the bushings?

Powerflexusa.com

[$howtime456]

yes changed mines awhile back to powerflex and noticed a vast improvement in steering

[Sylverlee]

Diff bushings impact steering?

[paul223]

Originally Posted by Sylverlee

Diff bushings impact steering?

He is talking about front upper and lower control arms, which I am doing next week.

[freak1]

Originally Posted by paul223

Now I don't need special tools so I will sell both. We can keep passing these tools to one member to another.

I’m looking to buy the press tool. How much would you sell including shipping to 30047? Please PM me.
Thank you

[windowmaker]

I replaced my diff bushings to the powerflex street ones and it feels now like the diff is bumping forward and back, which has gotten me into a few dangerous situations at highway speeds. My best guess is that it is not sized correctly, and shifts forward and back, upsetting the suspension.

For example, getting on and off the gas while cornering on the highway, the rear end unsettles and loses traction much more easily than with the stock diff.

[paul223]

I don’t think diff moves front and back much. Stiffer Bushing prevents diff from rotating less compared to factory bushings. Have you checked guibo, it crackes over time.