Noise at slow speed turns

[Hammerfang]

I’ve noticed a low frequency noise from the rear of my car when taking tight, slow speed turns. The sort when pulling into a parking spot or turning at a stop sign.

I thought having my diff fluid changed (~100 miles ago) would help but has made no difference. Any thoughts?

[oceansize]

BMW oil with FM and if not did you add FM to the oil?

[Hammerfang]

Shop used bmw oil but I doubt they added FM. The car did make the same noise before I had the fluid changed.

[oceansize]

Shop used bmw oil but I doubt they added FM. The car did make the same noise before I had the fluid changed.

If they used the BMW oil I linked to then it has the FM already mixed in. My car had a groan at low speed when I bought it. I used the BMW oil, did a few figure eights and the noise was gone. Worth asking what exactly they used (if you don't already know for sure).

[Hammerfang]

Just checked the invoice and it shows liquimoly…

[Estoril]

Just checked the invoice and it shows liquimoly…

They used the wrong product. Lack of FM is the cause.

[Hammerfang]

Great….is adding booster difficult?

[oceansize]

Great….is adding booster difficult?

Nope. Top plug on the diff. https://www.fcpeuro.com/products/lim...fier-4oz-80301

I like what the link above says. Add an ounce, figure eights for a minute, not gone then add another ounce, repeat. I wouldn't exceed 3 ounces.