Sta-Lube Equa-Torque Differential Friction Modifier SL2411-4 fl oz

Used with conventional gear oil on LSD diff and got rid of the diff chatter on slow sharp turns. The friction modifier had to be worked into the LSD by doing several sharp turns.

Bought this for my '03 Silverado HD. I had changed the rear diff oil and added GM spec friction modifier at 50k miles, but the diff began rumbling after the change. Since I had added the GM modifier, I really didn't think that it was a lube problem, and thought that I was looking at an expensive repair. I finally decided, after reading the many positive reviews of this product, to give it a shot before going the more expensive route. What a shocking surprise! There are a lot of additives out there that claim to fix everything you can imagine that could be wrong with your vehicles, and most are just a waste of your hard earned money, but this product really works. Before adding the Equa-Torque, I couldn't even move the truck in a straight line without hearing and feeling the rear diff rumbling. Now, after adding 4 oz. of this product, there is no rumbling whatsoever. It's as if a new diff was installed. If your having problems with a rumbling diff, I strongly recommend that you use this first in your attempt to eliminate the problem, and if you have a GM product, I also recommend that you stay far, far away from the GM modifier. It obviously does not work as it should, as I never had an issue until after changing the oil and adding the GM modifier. Incidentally, as mentioned by others, this isn't an instantaneous cure. Add it to the diff oil, take a short drive, park the vehicle for a day or two, and the next time you drive it, you be thinking that a mechanic snuck in while it was parked and rebuilt the diff.

Used it in the rear-end of my truck. Does was it claims to do

This product came highly recommended by a mechanic that was helping me isolate/identify/fix an annoying 'chirping' sound coming from the passenger side front wheel (I have a '97 Ram 4x4, so it has a lot of drivetrain related 'stuff' in the front) of my truck. HE seemed to think it was coming from the rear differential, and that it ahd something to do with the posi type of rear end - stated that when changing out the lube (I had done this about 2 months ago), it was wise to put a slip limiter type of additive in as well, and that the sound was coming from a friction problem. He suggested and swore by Equa-Torque, the product I purchased. Kind of against my better judgement (I still insist it's from the FRONT and NOT the rear), I decided to give it a try. Really couldn't do a thing to make it worse. Took awhile to even FIND it - cannot purchase locally (and ABQ is a very big city!), so I checked on Amazon, and VOILA - there it was! Once I received it, I followed the instructions - adding it and driving immediately after. Naturally the 'chirp' is still there, so I will return my focus to the original target area - I'm thinking it's a 'U Joint' out at the end of the front axle shaft.No worries though - stuff is great for it's purpose - easy to add and all. The purchase and shipping was flawless. I would recommend the product to anyone suffering from 'Posi' rear diff. All of my experiences with Amazon to date have been very positive!

Tacomaworld brought me here. Used with oil when changing my LSD.

This stuff is great honestly not many change there differential fluid and I used 75w-90. This was for my 2018 Chevy Camaro SS.I used Valvoline full synthetic 75w-90 the original fluid was due for a change. Even though the diff wouldn’t shake/chatter it was old.After I changed it it would chatter on turns and on acceleration it would shake and I would feel vibrations.After looking into it I figured out that I needed this right here and it fixed that problem right away after the 5 to 10 minute drive and going into a lot doing circles to mix the fluid.Now I can floor it and no shakes and nothing no more humming at freeway speeds I definitely recommend this!UPDATE:Noise came back I removed the oil and reverted back to the OEM oil.Do not put this in your diff unfortunately have more metal shavings than when I first did the change.Noise is now gone completely with OEMI wish this would have worked but unfortunately didn’t.

My '02 Tundra had 100K miles on it and decided to change the (LSD) differential oil. Installed the normal 80 -90w diff oil and immediately there was this grinding noise when turning corners. Looked at some Toyota forums and this product was one of the recommendations. Drained the old (new), purchased new Valvoline 80-90w and added Equa-Torque as directed. As with most things like this, I was skeptical, but turned the first corner, and it was smooth as silk. Almost magic!

I forgot to order the Ford brand, but it would have arrived too late. My rear differential was chattering and moaning on turns and it immediately stopped after adding this.