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KDAWG97M3 12-10-2011 10:42 AM
fluid questions
 
hey guys not a BMW noob, but maybe a x5..

couple of questions...

i get the debate on the tranny fluid to change or not...not sure there...


but the rear diff fluid...mobile 75-90?? can i put in 75-140 due to some mild towing?? what do we need for my front transfer case? i have 2001 x5 4.4

also thre seems to b a small leak on my transfer case as well?? any ideas?

brakes will be flushed with BMW dot 4

PS looks good..

Green coolant...not good..will get flushed. Any thing i am missing?? thanks for the help.

KDAWG

HPIA4v2 12-10-2011 11:35 AM
Quote:
Originally Posted by KDAWG97M3 (Post 855664)
hey guys not a BMW noob, but maybe a x5..

couple of questions...

i get the debate on the tranny fluid to change or not...not sure there...


but the rear diff fluid...mobile 75-90?? can i put in 75-140 due to some mild towing?? what do we need for my front transfer case? i have 2001 x5 4.4

also thre seems to b a small leak on my transfer case as well?? any ideas?

brakes will be flushed with BMW dot 4

PS looks good..

Green coolant...not good..will get flushed. Any thing i am missing?? thanks for the help.

KDAWG
I use Dextron III for my xfer case. Maybe the trace of fluid is just from last flush.

Yes I always use BMW brake/coolant.
As far as diff, I stick with 75-90 Redline/M1/RP and leave the heavier weight for LSD (limited slip diff) kind, but I doubt it'll do any harm with you go with heavier oil on your X5.

Welcome to the board.

JCL 12-10-2011 02:11 PM
I'd stay with 75w-90 for both differentials.

Since your vehicle is pre x-drive, use Dexron for the transfer case.

KDAWG97M3 12-11-2011 03:06 AM
Quote:
Originally Posted by HPIA4v2 (Post 855673)
I use Dextron III for my xfer case. Maybe the trace of fluid is just from last flush.

Yes I always use BMW brake/coolant.
As far as diff, I stick with 75-90 Redline/M1/RP and leave the heavier weight for LSD (limited slip diff) kind, but I doubt it'll do any harm with you go with heavier oil on your X5.

Welcome to the board.

Good question....do I need LSD fluids. Or bc we are AWD, no need?

JCL 12-11-2011 01:48 PM
Neither differential is a limited slip design. Limited slip differentials that have clutch plates use special LSD fluids. The X5 uses wheel brakes for traction control.

KDAWG97M3 12-11-2011 02:39 PM
Thanks..now should I put 75-140 or stay with 90 some towing will be occurring, that is why I ask?

chasz17 12-11-2011 04:51 PM
Stay with the BMW recommended weights. The vehicles are designed to tow up to 6,000 pounds with the proper hitch.

KDAWG97M3 12-11-2011 05:56 PM
Quote:
Originally Posted by chasz17 (Post 855834)
Stay with the BMW recommended weights. The vehicles are designed to tow up to 6,000 pounds with the proper hitch.
Ok 75-90 it is...


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