djreese

Trying to fix my issue ill post it below but I'm gonna knock this out first which most people on the forums are saying to replace the rear differential oil to fix the problem and ill go from there. Some are saying to use

RLDFL75W140NS REDLINE

or

BMW part #83222282583 the SAF-Xj with FM Booster

which one do you guys use? A lot of people on the M5 board are saying it fixes their issue by using the SAF-XJ with FM Booster but it has to have the FM booster on it, while most on reguar e60 board just use the redline in their cars.

Does it matter or just personal preference

Also is it worth getting an magnet differential plug?

I appreciate everyone's help
-Reese

this is my issue below that I posed in another thread, if you have input on this issue below also please feel free to help




Been searching the forums with not much luck other then the M5 board, I keep getting a rubbing/clunk sound out of my right rear if I go over a larger bump in the road or make a sharp right turn. I just had a lower control arms replaced in the rear along with an alignment which were bad and I thought was the problem. Well I still have it, I do have aftermarket rims F10 M5 19" rims and I do have sport suspension. My rear tires are 285/35/R19 when my mechanic looked at it, I also searched for forums for about 2 months before I got my tires and many people said they had that size tire in the rear with no problem, and I also say a 528 with 166's with same tire side in person at the stealership but my mechanic looked at it and said no sign of rubbing or tire wear so im kind of lost. Many M5's are experiencing this problem and they are saying replace the rear differential oil, well M cars have an LSD and regular E60's have bmw open differential.

djreese

Also when I go into BMW Parts and BMW Accessories | Bavarian Autosport they say for my car they say
Red Line Synthetic Differential Fluid - 75W90

or

Red Line Synthetic Differential Fluid - 75W140NS

djreese

I know 75w140 is for M cars but thats whats in the SAF-Xj with FM Booster

but it says either for my car so has anyone use 75w140 for their non M car?

now 75w90 or 75w140?

I want whatever is better for my car

Thanks again