Genuine Ford Fluid XL-3 Friction Modifier Additive - 4 oz.

I have a 2000 ford E350 ambulance with a 7.3 powerstroke diesel engine. 3 yrs ago I had to have the rear differential clutch pack replaced. I think he replaced the gears as well. He told me it will chatter a bit but would go away. It did chatter a bit but didn't go away. Recently it has gotten worse so I ordered 2x4oz. bottles of this stuff. It came in 2 separate boxes. I did order them alone due to other reviewers' warning about the smell and they weren't kidding. I also ordered a.big fluid syringe to "inject" it into the pumpkin. I have a prosthetic leg and some back issues due to a disc replacement surgery. This makes it hard for me to get under the truck so I took it to my friends shop. He had one of his young guys do the job for me. I won't lie, I also didn't want to touch the stuff. It stinks. Bad. The whole garage smelled of the stuff even still packed in the boxes. I put it in the side compartment of my van to bring it to the shop. I felt bad, the guy got it all over his hands and i.know it's going to be hard to get off. I hope he is allowed to sleep in the house tonight! Anyway by the time I got home the chatter seems to be.gone. I will have to do some serious sharp turns and reversing on an incline to know for sure, but it already is better doing normal driving with normal turns. I put 8 oz. In because that is what I saw as a recommendation for my differential. Anyway it's good stuff but it stinks. I left the syringe and boxes and empty bottles for him to dispose of!!

Works as expected. Genuine product.

Cheaper than box store. Used in my Ford limited slip differential. No chattering from the clutch pack.

Buenísimo pero tengan cuidado si lo ponen en trasmisión automática los químicos que tiene la pueden dañar

Had a Auburn limited slip installed on F-150 a few years ago. Install shop used the Auburn recommended mix of 80-90 non-synthetic hypoid gear oil and Auburn limited slip additive. Axle began to shutter/chatter 300 miles later. Added a bottle of this Motorcraft stuff and problem completely solved. Fast forward to now: The shop that installed the Auburn posi didn’t seal the diff cover very well it would seep around the bolts and collect grime. Finally it began to drip. Decided to change rear axle fluid mostly so I could have a shot at finally sealing the diff cover correctly, This time I used Mobil1 75-140 LS gear oil. That’s full synthetic and is supposed to have limited slip additives included. Chattered bad. Then I added a bottle of KW limited slip additive. Chattered as bad or almost as bad. Then I added a bottle of this Motorcraft stuff. Instantly chatter free yet again! Yes it stinks something fierce. Even after cleaning my oil catch container with brake cleaner and letting it dry outside for an hour the remaining invisible residue stunk up the garage. Wear gloves and be careful so you can minimize drips and residue. But it also WORKS! For my situation it’s been that only thing which has. Side note: Recommend Permatex “Gear Oil Formulated” RTV to seal the diff cover. Good consistently, nice gray color, and is resistant to friction modifiers breaking it down. Rear axle is finally bone dry on the outside.

Great product for friction on posi traction rearends.

It works!

Excelente artículo