Gears

[MT94]

Hi all I have recently got a z4 (my first z4) and I have noticed once I have been driving for a while I get a thud/ clunk as I put in 1st it goes in like normal and doesn't struggle in gear just wondered if this was a common thing or a rare thing
Matt

 

[paulgs1000]

Had a similar issue in my 3.0si - when I let the clutch up in 1st I could sense a similar slight thud/clunk - if it's the same thing, my independent specialist diagnosed it immediately and stripped and lubed my prop shaft connection (I think). Sorted it for us and it wasn't an expensive fix, in any case and he said it was very common and a known issue.

Hope you find the same

 

[MACK]

Hi all I have recently got a z4 (my first z4) and I have noticed once I have been driving for a while I get a thud/ clunk as I put in 1st it goes in like normal and doesn't struggle in gear just wondered if this was a common thing or a rare thing
Matt

Does it do it in reverse as well, mine did before I sorted (applied a special grease) to the propshaft

 

[MrPT]

There was a service bulletin about these symptoms and the fix mentioned by Paul - SI B33 04 08.

SI B33 04 08 August 2009 Rear Axle Technical Service
This Service Information bulletin supersedes SI B33 04 09 dated October 2008.
designates changes to this revision SUBJECT
The differential input flange mating surface with the input drive pinion is insufficiently greased.
MODEL
E82 and E88 (1 Series), all models
E85 and E86 (Z4), all models
E60 and E61 (5 Series), all models
E63 and E64 (6 Series), all models
E65 and E66 (7 Series), all models
E90, E91, E92 and E93 (3 Series), all models
Situation
The customer complains that a single cracking or clicking noise can be heard from the rear of the vehicle while engaging a drive gear, releasing the clutch, during load reversal (shifting from reverse to drive, etc.), or when accelerating from a stationary position. Procedure
This is not a failure of the differential assembly. Do not replace the complete differential.
Remove the differential drive flange in accordance with Repair Instruction RA 33 11 021.
Apply lubricant P/N 83 23 0 443 864 on the input flange mating surface (1), as described in the illustration.
Before complete reassembly, replace the input flange seal and collar nut retaining plate as described in RA 33 01 021. Refer to the EPC for correct part numbers, based on model.
Parts information
Part Number Description Quantity
Lubricant ** Refer to EPC Drive Flange Seal 1
83 23 0 443 864

Refer to EPC Collar Nut Retaining Plate 1
** See Warranty sublet information.
WARRANTY INFORMATION
Covered under the terms of the BMW New Vehicle Limited Warranty.
Defect Code:
Labor Operation:
33 10 01 39 00
Labor Allowance: Description:
Refer to KSD Replacing Input Shaft Flange Seal
** Reimbursement of up to the amount listed may be charged to sublet code
4 for the lubricant ( P/N 83 23 0 443 864) required to perform this repair. Claiming this part number outside of sublet code 4 will result in a delayed or denied claim payment.
33 11 021
Sublet Code 4**
$9.00
*Main Work - use this labor operation number when this is the only repair being performed, or if this is the main repair when performed along with other repairs at the same time. If this is not the main repair, refer to KSD for the associated (+) labor operation code.
[ Copyright ©2009 BMW of North America, Inc. ]

 

[MT94]

Hi there it only happens when selecting first I get a bump noise from under the car I can feel it through the car, it seems like this is a common problem hopefully I can get it sorted without too much problems
Matt

 

[MACK]

Hi there it only happens when selecting first I get a bump noise from under the car I can feel it through the car, it seems like this is a common problem hopefully I can get it sorted without too much problems
Matt

It's been best part of 2 years since I did mine, I seem to remember its a special type of loctite lube, think it was called 660 and you apply to the splined shaft. Basically the paste takes up minute gaps between the threads that is causing the clunking when they come into contact when you first move off. I bought it online, as ever its cheaper than the dealer.

 

[Behr]

My E60 M5 did this. Drove me mad. Sometimes it was really very loud so I sympathise. It was under BMW warranty back then hence I had a similar procedure done to rectify it at BMW.