Not really a mod but I need some info on the Differential

[Shipkiller]

I have a 2003 Z4 that just turned over 50K. I want to change the rear differential fluid. I found two drain holes but no fill hole.

Where is it?

I know the fluid is supposed to be a lifetime fill, but I want some insurance that the oil is good. Hell, it only takes 2.1pints......

[kurtdaniel]

Originally Posted by Shipkiller

I have a 2003 Z4 that just turned over 50K. I want to change the rear differential fluid. I found two drain holes but no Autopartswarehouse fill hole.

Where is it?

I know the fluid is supposed to be a lifetime fill, but I want some insurance that the oil is good. Hell, it only takes 2.1pints......

It depends upon if the car is an automatic or a manual transmission. fill holes should be in the area near the tranny.

[Shipkiller]

Figured it out several months ago.

Changed the Diff and Tranny oil.

[The HACK]

Originally Posted by Shipkiller

I have a 2003 Z4 that just turned over 50K. I want to change the rear differential fluid. I found two drain holes but no fill hole.

Where is it?

I know the fluid is supposed to be a lifetime fill, but I want some insurance that the oil is good. Hell, it only takes 2.1pints......

The top "drain hole" is the fill hole.