Xdrive transfer case

cheesetoastie · 10-06-2018, 01:31 PM

How would you diagnose a issue with the transfer box.
I tried to get a run on 4 wheel drive dyno but the car wouldn't stop skipping and hoping about. The operator had only had 1 other xdrive on the dyno before and it ran fine. He said it may be an issue with the xdrive.

Enabled · 10-06-2018, 02:05 PM

Did you disable DSC by holding the DSC button until dash says DSC Off?

cheesetoastie · 10-06-2018, 02:21 PM

Quote:

Originally Posted by Enabled

Did you disable DSC by holding the DSC button until dash says DSC Off?

I wasn't in the car mate. The dyno operator did the run

Jeff_29 · 10-10-2018, 12:37 PM

You should disconnect the connector of the vtg control unit located on the transfer box.
The clutch remains open (only RW drive in this case).
It could fix your problem.

Enabled · 10-10-2018, 01:58 PM

Quote:

Originally Posted by Jeff_29

You should disconnect the connector of the vtg control unit located on the transfer box.
The clutch remains open (only RW drive in this case).
It could fix your problem.

That's extreme but will work; you can simply code it off for temporary purposes.
I think he said he was on a 4 wheel dyno, so it shouldn't matter, except when the car thinks it has wheel slip.

cheesetoastie · 10-10-2018, 02:22 PM

Thanks for the replies
We did pull the no 32 fuse that put it in rear wheel drive only but made much lower figures.
4 wheel was around 380bhp it made this number on 3 runs. 2 wheel mode made 350bhp. This was with a remap.
Both modes made the standard 310bhp with map removed

10-06-2018, 01:31 PM	#1
cheesetoastie Private First Class 25 Rep 109 Posts Drives: F30 335D Join Date: Aug 2018 Location: London iTrader: (0)	Xdrive transfer case How would you diagnose a issue with the transfer box. I tried to get a run on 4 wheel drive dyno but the car wouldn't stop skipping and hoping about. The operator had only had 1 other xdrive on the dyno before and it ran fine. He said it may be an issue with the xdrive.
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10-06-2018, 02:05 PM	#2
Enabled Lieutenant Colonel 1410 Rep 1,802 Posts Drives: 328xd Wagon, M2 Competition Join Date: Jun 2018 Location: Houston iTrader: (0)	Did you disable DSC by holding the DSC button until dash says DSC Off? __________________ -2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs. -2019 M2 Competition MT, Alpine White. Self-tuned 560hp -2016 Mini Cooper S, MT. Many plans. Others: -E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
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10-10-2018, 12:37 PM	#4
Jeff_29 New Member 0 Rep 5 Posts Drives: BMW F22 220d Mtechnic Join Date: Oct 2018 Location: France iTrader: (0)	You should disconnect the connector of the vtg control unit located on the transfer box. The clutch remains open (only RW drive in this case). It could fix your problem.
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10-10-2018, 02:22 PM	#6
cheesetoastie Private First Class 25 Rep 109 Posts Drives: F30 335D Join Date: Aug 2018 Location: London iTrader: (0)	Thanks for the replies We did pull the no 32 fuse that put it in rear wheel drive only but made much lower figures. 4 wheel was around 380bhp it made this number on 3 runs. 2 wheel mode made 350bhp. This was with a remap. Both modes made the standard 310bhp with map removed
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