I want to flush my transfer case/tranny/diff fluids...

[audiquattrot]

What would you guys recommend for each?

My iX didn't come with any manuals, so I wasn't sure how many quarts everything takes, and what the recommended fluids to be used were.

I'm guessing ATF for the tranny? and gear oil for the transfer case & rear diff?

[smcdermott326]

iX Driveline oil change.
>
> Front differential:
> Spec: 90W GL-5
> capacity: 0.75 qt
> drain/fill plugs: internal (Allen) head, Size ?
> commonly used after market oil: Redline Synthetic 75W90
>
> Rear differential:
> Spec: 90W GL-5
> capacity: 1.8 qt
> drain/fill plugs: internal (Allen) head, Size ?
> commonly used after market oil: Redline Synthetic 75W90
>
> Manual Transmission:
> Spec: 80W GL-4
> capacity: 1.4 qt
> drain/fill plugs: internal (Allen) head, Size 17MM
> commonly used after market oil: Redline Synthetic MTL (manual
transmission lubricant)
>> > AT: 3.2 US quarts/3 liters

> Transfer case:
> Spec: ATF
> capacity: 0.6 qt
> drain/fill plugs: internal (Allen) head, Size 17MM
> commonly used after market oil: Redline Synthetic ATF

[tirefryer]

For the transfer case, the recommendation is Redline Synthetic ATF: D6 or D4? I am assuming D4, but can someone verify this.
Thanks.

[ScottJ]

Redline ATF D4

Redline ATF D4 is what you use. D6 is a different spec.

[tirefryer]

Thanks!

[ZM Blue Devil]

also have new crush washers ready

[tirefryer]

also have new crush washers ready

Hadn't thought of that... can I get the size of the crush washers from RealOEM?

[nando]

also have new crush washers ready

there aren't crush washers on any of the drivetrain, only the oil pan.

[tirefryer]

there aren't crush washers on any of the drivetrain, only the oil pan.

I like this much better :)
Thanks nando!
Any recommendations on where to order Redline products from...Jegs? Summit? ...?

[z122643]

there aren't crush washers on any of the drivetrain, only the oil pan.

There are crush rings on the transfer case, Front differential, and rear differential.

[nando]

not on the fill plugs. they're pipe-thread fittings. I've done all 3 of those like 10 times myself. :)

[z122643]

Interesting, only my fill on my xcase was pipe-threaded.

[canadiankid]

Anyone know crush washer sizes just in case?

[z122643]

Xcase drain plug washer size is 18x22 BMW#07119963308

[canadiankid]

So go to the dealer to get it or is there a standard size?