[wxm]

Thanks for sharing the NT530 register steps. It was indeed not so trivial to find the option.

[jabbafunkeez]

Originally Posted by wxm

Same here, instead of taking off the supporting bracket I bought this special wrench from ecs for $16. It has 14mm allen at one end 17mm box on the other. It works well on my fluid change. There is a downside, that i could not really torque the drain/fill plug to the spec, and only went with the feel. Hopefully I did not over-tighten it.

You can also do this and make your own tool. That tool becomes 60 dollars if I order it and shipped to Canada. Crazy shipping price. I ended up taking the mount as well. It was time consuming but I got it done.

[evilchargerfan]

OP, I hope its okay to share a UOA of what our transfer case fluid looks like?



(if not, lmk and I can take it down)

[gzalexta]

Thanks for sharing

[couchflyer]

I just did my X4 M40i, thank you for the guide.

[ThomasR]

Originally Posted by pungo

With ISTA+ there are separate functions for "Repair" and "Transfer Box (VTG) Calibrate". AFAIK, "Repair" is when you're replacing the transfer box or major components, while "Calibrate" is when changed fluid or other minor repairs. I only performed the "Calibrate" and didn't have to clear any errors.

Just realized, since this is a diff fluid change thread, we should have made these posts in the "DIY: Let's change our transfer case fluid" thread.

Repost from my thread.

[ThomasR]

I performed this yesterday and the ISTA+ guide by Pungo above was perfect! It reset the calibration back to 0.0 and told me what it was like (10 something).

[khaul]

thanks,
it's really helpful

[gk_bimmer]

Originally Posted by ThomasR

I performed this yesterday and the ISTA+ guide by Pungo above was perfect! It reset the calibration back to 0.0 and told me what it was like (10 something).

I removed the bracket and used a rather expensive scanner (already owned the tool so why not) to reset/calibrate the VTG. Sharing full details in this video:

ISTA sounds like a great option and I'll try it next time.