Diff running in?

[Pulse]

Getting a new diff, and wondering if it will need running in at all? It's not an LSD.

[stevieturbo]

nope, good to go from the outset

[Bozwell]

a rear wheel drive diff will always need running in. but since there is no infomation to go by we can only guess (other than spending time searching) what the OP has.

but they dont need hundreds of miles. i usually run the car in gear with the axle off the ground for fifteen minutes so no load. then a gentle drive for 20 minutes or so.

at first diffs (crown wheel and pinion) get very hot until they have been run in for a while. the more miles you do the cooler they run as the teeth bed. even if an axle has been apart and only new bearings fitted i still run them in just to make sure incase there is a slight difference in the meshing.

Edited by Bozwell on Monday 14th June 23:40

[Pulse]

Bozwell said:

a rear wheel drive diff will always need running in. but since there is no infomation to go by we can only guess (other than spending time searching) what the OP has.

but they dont need hundreds of miles. i usually run the car in gear with the axle off the ground for fifteen minutes so no load. then a gentle drive for 20 minutes or so.

at first diffs (crown wheel and pinion) get very hot until they have been run in for a while. the more miles you do the cooler they run as the teeth bed. even if an axle has been apart and only new bearings fitted i still run them in just to make sure incase there is a slight difference in the meshing.

Edited by Bozwell on Monday 14th June 23:40

Brill, thanks. It's my Z4. I'll take it easy for the first hundred miles then, just to be sure

[JontyR]

I personally cant recommend running in a diff enough.

The best way to run it in is to goto a carpark and do figure of eights slowly increasing your speed.