rear end oil suggestions
 

Looking for a recommendation for rear axle lube. Currently getting some chatter when going around corners.

Before you go to the trouble of changing the fluid, maybe try put in a bottle of the Ford friction modifier. That is the additive for the fibre material in the Traction-Lok clutch packs. Grabby clutches is usually what causes the chattering, and it can sometimes be cured by dumping in a 4 ounce bottle of the additive. Motorcraft number CXL-3, $5.27 + tax at your local dealer.

If that doesn't fix it, replace the fluid with some good synthetic product, with a bottle of the friction modifier added.


cheers
Ed

X2 on the friction modifier. I've seen several chatters fixed with just that.

Yes Friction Modifier will likely do the trick. I can't remember the brand I used on my truck, but I purchased it at Bumper-to-Bumper, and imo it worked better than the modifier I purchased from the Ford dealership.

Thanks for the updates.

X 100 for friction modifier. I used the stuff from the Ford Dealership when I upgraded the diff. in the 6-er. Inexpensive and did the job perfect.

The official Ford stuff is the best on the market. I have been using it in all makes of limited slip diffs for years. I use Amsoil gear lube, and when I installed my 8.8 last year, I decided to try their "slip-lok" additive as well...not as good. When the rear end is hot, I still get a bit of clutch chatter. I know if I had used the Ford additive, I would not hear this.
Oh, don't get any on 'ya... That stuff is bar none the stinkiest automotive fluid out there, and it doesn't wash away easily.

what causes chatter, age use or????

Haha Roddy you got that right on the smell

Not that I am an expert but I always use Ford fluids when/where possible.