B4 diff, Which greases do people use?

[jaxx]

I'm just about to rebuild my B4 diff, Are the associated Black grease and Tranny lube the best or is there secrets i'm missing out on? I'm going to use some ceramic balls so do i need different grease?

[bigred5765]

clear silcone for the diff balls and rings, black grease for the thrust race only,

[way_to_hell]

Hey,

U can use the greases, which are included in the kit as well.

But if ur using ceramic diff balls u ar able to use less of the silicone lube, as u normally use for the carbide balls...

[Big G]

Originally Posted by bigred5765

clear silcone for the diff balls and rings, black grease for the thrust race only,

Same here

B44 ones are silky smooth and I've done loads of races on them. B4 ones developed a flat spot so I replaced the balls and so far so good. I suspect the B4 one was over-tightened

[buhade]

As a pro you should use the asso black grease for the diff ring side to the diff outdrive hub, so the diff ring is "grippy" on the outdrive - very very important

Inside to the 3/32 balls you use the standard diff silicone lube from asso.

for the pressure bearing you use the black grease too.


Dont use ceramic balls for offroad - the surface of siliciumnitrid (ceramic) balls is moore flat and smooth then the carbid balls- and so it is impossible that the balls can cut right into the diff ring. So you have no grip between diff ring and balls and no good traction in offroad- in touring car Scale racing you can use the ceramic balls.

[Thomas P]

B-grease for thrustballs...<Losi diff lube for...the diff...for me it work ase..

[Chillout47]

Whats the point in putting grease on the outside of the diff rings if you dont want them to slip? dont use any grease at all!!! simples. I know it says in the B4 manual to grease the outside, but I never have and have never had a bad diff.

I disagree with the advice given regaring diff ball types. Touring cars are a hell of a lot harder on diffs/transmission with massive power going through them. An off road car is protected by a slipper, if it is set up right the diff should never slip, plus they dont have as much power because of the limited grip.

I think your diff balls will work a treat, just stick with the kit greases, they are in the kit for a reason.

Cheers, Mark.