North East transmission recommendations

vxtyrant · 11-06-2023, 10:28 AM

My 2016 F31 BMW 335d x-drive (50k miles) has developed a very slow oil leak but no change in the way it drives at all - no acceleration hesitations, missed gears or strange noises. I’ve had it up on a friend’s ramp and it appears to be coming from where the transfer box meets the gearbox (see attached pic).

Could it be just a seal or something more sinister?

Does anyone have any recommendations for garages in the North East, ideally near Durham, that could diagnose this?

Thanks in advance

danb1979 · 11-06-2023, 10:33 AM

ZF recommendations/partners here:

https://aftermarket.zf.com/en/afterm...ocality=Durham

vxtyrant · 11-06-2023, 11:36 AM

Quote:

Originally Posted by danb1979

ZF recommendations/partners here:

https://aftermarket.zf.com/en/afterm...ocality=Durham

Ah thanks. I was looking at Austrin Gearbox Specialist Ltd but a fair distance away. Will get in touch with them given they are recommended aftermarket for the ZF. Thanks again

dave550i · 11-06-2023, 12:00 PM

Looks like it could be just a weep from the plastic sump pan, which are known to warp sometimes could try to tighten the rear sump bolts to 10nm and spray with brake cleaner and wipe clean then check to see if still leaking, the pan bolts are 40 torx if i remenber correctly good luck

vxtyrant · 12-09-2023, 05:39 AM

Turns out it was the transfer box seal so required removal, rebuilding and resealing. £645+VAT.

Got the gearbox serviced while I was on. £1282 all in.

Austrin were fantastic to deal with

11-06-2023, 10:28 AM	#1
vxtyrant New Member 12 Rep 28 Posts Drives: F31 335d Join Date: Oct 2020 Location: North East iTrader: (0)	North East transmission recommendations My 2016 F31 BMW 335d x-drive (50k miles) has developed a very slow oil leak but no change in the way it drives at all - no acceleration hesitations, missed gears or strange noises. I’ve had it up on a friend’s ramp and it appears to be coming from where the transfer box meets the gearbox (see attached pic). Could it be just a seal or something more sinister? Does anyone have any recommendations for garages in the North East, ideally near Durham, that could diagnose this? Thanks in advance
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11-06-2023, 10:33 AM	#2
danb1979 Idiotic lifter of heavy stones... 1987 Rep 2,167 Posts Drives: 2015 F31 325D M Sport touring Join Date: Feb 2022 Location: Preston, Lancashire - UK iTrader: (0)	ZF recommendations/partners here: https://aftermarket.zf.com/en/afterm...ocality=Durham __________________ My car: 2015 F31 325D M Sport Touring in Glacier Metallic Silver - Keeping it OEM 'Plus' Project: https://f30.bimmerpost.com/forums/sh....php?t=1982298
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11-06-2023, 12:00 PM	#4
dave550i Private First Class 82 Rep 161 Posts Drives: 2016 640D Vert Melbourne Red Join Date: May 2017 Location: York iTrader: (0)	Looks like it could be just a weep from the plastic sump pan, which are known to warp sometimes could try to tighten the rear sump bolts to 10nm and spray with brake cleaner and wipe clean then check to see if still leaking, the pan bolts are 40 torx if i remenber correctly good luck
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12-09-2023, 05:39 AM	#5
vxtyrant New Member 12 Rep 28 Posts Drives: F31 335d Join Date: Oct 2020 Location: North East iTrader: (0)	Turns out it was the transfer box seal so required removal, rebuilding and resealing. £645+VAT. Got the gearbox serviced while I was on. £1282 all in. Austrin were fantastic to deal with
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