Red Line 80301 Limited Slip Friction Modifier - 4 Ounce

I fitted a limited slip differential gearbox to my mini which creaked and moaned and groaned when turning slowly. Added half a bottle of this to the oil in the gearbox and the problem was gone instantly.

Bought this as I have a Drexler plated diff and I’ve purchased various top brand gearbox oils but still had slight noise and chatter going round very tight corners. So I put in normal 75w 85 oil in and added a ounce at a time until noise and chatter had gone, I can say it has no noise what so ever and this is a brilliant product.

worked well stopped my lsd knocking

Did the job

Didn’t really make any difference to my jeep differential.

Worked like a charm but you have to spend 20 minutes doing figure 8's at slow speed.Solved the drag sound.

Rear end clutches we making a noise in my 2010 f150Added this product and in a week it was gone.

This thing works like magic. My LSD differential (M3 e92) started to chatter and make noise on tight turns after replacing the fluid, and it kept getting worse and worse. So i replaced the oil again and added this FM and problem is solved. However, it might be a good idea to only add half a bottle first and see if it solves the problem. I added one complete bottle and feel like the LSD locks a bit less than before (less fun :) ) so i will drain a little bit of the oil (half a liter) and add some new oil maybe the locking is stronger again.But this is perfect, i was worried the differential was going bad.

I saw a lot of info saying to use the Ford limited slip modifier for my 8.8 rebuild, but it's $70 a bottle. I trust Redline, so I bought this and used it. I soaked the limited slip clutches in it for two weeks, and installed them and poured the modifier in the rearend. The first few days I had some rubbing in the rear, but it's settled in nicely and rarely grunts. I'll definitely use it again.

item was as described and was delivered on time