Quick ZF5HP24 question..
 

I am planning to rebuild the ZF5HP24 on my X5 4.4 01. I have found a used one but it is from a 7.40 and the serial number ends with 022 instead of 029 on mine. I am simply planning to rebuild this and replace it with the one on my X5. Would it be compatible? I was told the transfer case would not match but I would like to have more opinions..


Thanks,


Ozzie

The tail housing and output shaft would be different. Other than that, I believe the two ZF5HP24's are the same. You can not simply swap in the 740i transmission unless you plan to leave off the transfer case and make a custom driveshaft so that you can run 2wd. That would be more effort than simply rebuilding the transmission. Likely, it's a new o-ring, thrust bearing, and shim that is easy to access once you have the front cover off. Full transmission rebuild might not be necessary.

I did the full rebuild last year. It was "fun" and a learning experience. Find the service manual for the ZF5HP24 on the internet. Make sure you order the right parts. I ordered a ZF5HP24A filter on accident.

Thanks for the quick reply. So, I will look around for the X5 version of the transmission. (There is actually one on an X5 at the junkyard but Chicago is freezing and I do not feel like trying to get that out of it by myself)

This meanwhile is after a rebuild of my valvebody hoping that it would fix things but there are still issues with the transmission including the D delay and engagement issues when cold. So I am thinking it is time to put a rebuilt one in unless there is another solution that you may be aware of.



Thanks again,


Ozzie

Additionally, the main casing and selector shaft are different on the 022 & 029 models because the X5 has the selector lever/cable and the inhibitor switch mounted on opposite sides of the casing (cable on LHS, inhibitor switch on RHS) so it features a long selector shaft that passes through the full width of the casing to connect the two, whereas the 022 model has them both on the same (left hand) side, so it only needs a short selector shaft

Phil

When they rebuilt the valve body, did they also replace the solenoids with new ones?

I just pulled the transfer case off a 328xi today solo on jack stands. I might be convinced to help a brother out yanking a transmission.

I have rebuilt the valve body myself picking up another one from another X5. I have used a rebuild kit, tested the valve body with a vacuum tester as well as the solenoids. Their impedance were good and were working fine when voltage applied.


I guess now it's time to find the same transmission and work on that one.



Thanks,


Ozzie

Thanks for the kind offer for help. How difficult is to take one off from an X5 anyway? I have been reading about the details when people are taking them off to rebuild and put back. I am hoping to simply take it off from another car ($150 or so here at a junkyard for a transmission) and work on it slowly and hopefully replace it with what I have on my car late spring.


I am very angry at the previous guy who rebuilt this because it has only been 30k miles (of easy driving) and I believe a transmission should not break that quickly..


Thanks,


Ozzie

The yard won't pull the trans if you offer to pay them? Perhaps the yard know of some pickers that is willing to help you pull the trans if you pay them.

I thought about that too. I will ask and see what they say..


Thanks,


Ozzie