Leaking oil from bellhousing.

[06 X5]

Another saga with the X5 (06 4.4i). Every time I get something fixed, another thing pops up! I just fixed my drivers side door handle carrier, New front regulator clips from regulatorfix.com and new BMW black clips. Got them fixed and now I can open my driver's side door again, my windows roll up smooth as silk, and they don't rattle when I close the door or pop when I am rolling the window up or down. I feel happy! I love the X5 again!!! Then she gives me another swift kick in the manhood.

I have been hearing a little more noise than usual from my transmission, so I decided to do a transmission service.

I drained the fluid, installed a new sealing sleeve (was leaking slightly), new filter, and refilled with ZF lifeguard 6. Since then, the car has operated much more smoothly. YAY! Drives smoother, no more lurching at idle! X5 says, "Hey there, not so fast... Open your legs. Another swift kick is headed your way!"

Now I have noticed that I have oil leaking out of the bellhousing inspection ports and have realized that I will need to pull the transmission to replace the transmission input shaft seal. Can anyone please confirm this part number for me? Is it 24-31-7-519-352? Picture borrowed from Rockit....


I am planning on getting this completed over the next few weeks. I also plan on doing the rear main seal and engine coolant cover on the back of the engine. Another pic for clarification of rear main seal (P/N 11-14-7-512-101)
and Engine coolant cover (P/N 11-14-7-504-376)


I will also be ordering new flywheel bolts and a few extra exhaust studs in case I break one or two during the removal.


I plan on taking some pictures during the process and making a how-to for the transmission removal and seal replacements. What are other seals/parts that I should replace at the same time? Transfer case seals?

Any help would be appreciated! I just want to make sure I have everything on hand to try and prevent any unnecessary down time and I need clarification on the input shaft seal part number.

Thanks in advance!

[X53Jay4.8is]

Originally Posted by 06 X5

Another saga with the X5 (06 4.4i). Every time I get something fixed, another thing pops up! I just fixed my drivers side door handle carrier, New front regulator clips from regulatorfix.com and new BMW black clips. Got them fixed and now I can open my driver's side door again, my windows roll up smooth as silk, and they don't rattle when I close the door or pop when I am rolling the window up or down. I feel happy! I love the X5 again!!! Then she gives me another swift kick in the manhood.

I have been hearing a little more noise than usual from my transmission, so I decided to do a transmission service.

I drained the fluid, installed a new sealing sleeve (was leaking slightly), new filter, and refilled with ZF lifeguard 6. Since then, the car has operated much more smoothly. YAY! Drives smoother, no more lurching at idle! X5 says, "Hey there, not so fast... Open your legs. Another swift kick is headed your way!"

Now I have noticed that I have oil leaking out of the bellhousing inspection ports and have realized that I will need to pull the transmission to replace the transmission input shaft seal. Can anyone please confirm this part number for me? Is it 24-31-7-519-352? Picture borrowed from Rockit....


I am planning on getting this completed over the next few weeks. I also plan on doing the rear main seal and engine coolant cover on the back of the engine. Another pic for clarification of rear main seal (P/N 11-14-7-512-101)
and Engine coolant cover (P/N 11-14-7-504-376)


I will also be ordering new flywheel bolts and a few extra exhaust studs in case I break one or two during the removal.


I plan on taking some pictures during the process and making a how-to for the transmission removal and seal replacements. What are other seals/parts that I should replace at the same time? Transfer case seals?

Any help would be appreciated! I just want to make sure I have everything on hand to try and prevent any unnecessary down time.

Thanks in advance!

All good maintenance while the transmission is out. One thing I would be sure to do is get the seals from BMW to get the best quality. Stay away from cheap aftermarket seals/parts. Sounds like you have the bases covered with what should be done. This will ensure many more miles of leak free service.

[06 X5]

Thanks for the vote of confidence. Can you confirm that I have the part number right on the input shaft seal?

[06 X5]

Also, should I be concerned with ordering the transfer case seals, or is there any other preventative maintenance items I need to do or at least inspect? I was thinking of adding new flex discs (guibo) and I already ordered some lemforder sway bar end links. Maybe a transfer case fluid change? If so, what type of oil?

I was most likely going to order BMW seals, but it's not like BMW has a good track record with its o-rings and seals actually sealing. I've done nothing but chase leaks since I bought it! I guess 140k miles is a bit, but I've had Honda, Toyota, and Nissan cars that have gone over 200k with nearly no leaks ever! You'd be extremely lucky if you owned a BMW Went 100k without springing leaks... rant over!

[RRPhil]

Originally Posted by 06 X5

Can you confirm that I have the part number right on the input shaft seal?

The photo is actually of a different transmission (5HP24) to yours (6HP26) but they are similar. Unlike the 5-speed, though, the 6-speed doesn’t use a snap ring to retain the input seal in the pump housing :



and yes, your part number is correct (the ZF part no. is 0734 319 695).

Phil

[06 X5]

Thank you RRPhil for that photo and the clarification! I really appreciate it! I also just stumbled across the 6hp26 teardown thread that you have posted.. Thank you for that wealth of knowledge!! Hopefully I don't need to do a rebuild any time soon, but in case I do, your work documenting that will prove to be extremely valuable.


Do you have any suggestions on other parts I should have on hand to do this repair to limit the possibilities of having any unnecessary downtime?

[X53Jay4.8is]

Originally Posted by 06 X5

Also, should I be concerned with ordering the transfer case seals, or is there any other preventative maintenance items I need to do or at least inspect? I was thinking of adding new flex discs (guibo) and I already ordered some lemforder sway bar end links. Maybe a transfer case fluid change? If so, what type of oil?

I was most likely going to order BMW seals, but it's not like BMW has a good track record with its o-rings and seals actually sealing. I've done nothing but chase leaks since I bought it! I guess 140k miles is a bit, but I've had Honda, Toyota, and Nissan cars that have gone over 200k with nearly no leaks ever! You'd be extremely lucky if you owned a BMW Went 100k without springing leaks... rant over!

Unfortunately you cant compare Japanese to the German engines. The Japanese engines are sealed with seam sealer instead of gaskets. It is really good. I am convinced that the Germans allow for leaks to develop so that there is built in service or the customer thinks the engine is coming to an end and then rid/replace vehicle. Its a very effective scare tactic on the German designers behalf.