Reinstalling Transmission Questions (5HP24 / 03' 4.4)

[marcot1]

Long story / short I purchased an 03 x5 a few months ago with known transmission issues (fail safe and output speed sensor code). I've completed the tear down and rebuild of the ZF 5HP24, the Valve Body and had a local transmission shop rebuild the torque converter.

The transmission is on the jack and I'm almost ready to put everything back together. I've read through most of the threads about the x5's transmission and feel pretty confident about getting it back in but had a few questions.

• When looking at the back of the engine about the 9 o'clock position are 2 bolt holes that are NOT threaded into the engine block but instead had a nut, is this normal? I've not seen it mentioned any where else.


• The BMW manual mentions using a tool to align the torque converter to the ring gear, I'm contemplating getting an appropriate sized bolt and cut the head off. (BMW part number 24 2 300 i)

•*When filling the transmission with fluid should I use the filter change instructions? I'm pre filling the torque converter with as much as it can take before mounting it.


The transmission had several blown gaskets on the A clutch as well as a bad bearing between the clutch B and brake C. All the gaskets/seals were replaced and a couple of bearings as preventive measures. I rebuilt the valve body after a complete disassembly / cleaning revealed no issues with any of the castings.

[Overboost]

Originally Posted by marcot1

Long story / short I purchased an 03 x5 a few months ago with known transmission issues (fail safe and output speed sensor code). I've completed the tear down and rebuild of the ZF 5HP24, the Valve Body and had a local transmission shop rebuild the torque converter.

The transmission is on the jack and I'm almost ready to put everything back together. I've read through most of the threads about the x5's transmission and feel pretty confident about getting it back in but had a few questions.

• When looking at the back of the engine about the 9 o'clock position are 2 bolt holes that are NOT threaded into the engine block but instead had a nut, is this normal? I've not seen it mentioned any where else.


• The BMW manual mentions using a tool to align the torque converter to the ring gear, I'm contemplating getting an appropriate sized bolt and cut the head off. (BMW part number 24 2 300 i)

•*When filling the transmission with fluid should I use the filter change instructions? I'm pre filling the torque converter with as much as it can take before mounting it.


The transmission had several blown gaskets on the A clutch as well as a bad bearing between the clutch B and brake C. All the gaskets/seals were replaced and a couple of bearings as preventive measures. I rebuilt the valve body after a complete disassembly / cleaning revealed no issues with any of the castings.

Just make sure to get the TC all the way seated in the transmission. I believe 2 sets of splines need to be engaged or you will bind and damage the transmission oil pump when you tighten the transmission to the engine. Just make sure the TC is always free until you have the engine and transmission fully bolted together.

[upallnight]

If you rebuilt the valve body, make sure you reset the adaptation. The TCM will reuse the existing adaptation of the old valve body and the line pressure will be the same and may be the reason why you needed to rebuild the trans in the first place.

[marcot1]

Originally Posted by upallnight

If you rebuilt the valve body, make sure you reset the adaptation. The TCM will reuse the existing adaptation of the old valve body and the line pressure will be the same and may be the reason why you needed to rebuild the trans in the first place.

I've seen conflicting info about resetting the TCM, what is the proper way to do so? New to the BWM world but not cars in general.

[marcot1]

Originally Posted by Overboost

Just make sure to get the TC all the way seated in the transmission. I believe 2 sets of splines need to be engaged or you will bind and damage the transmission oil pump when you tighten the transmission to the engine. Just make sure the TC is always free until you have the engine and transmission fully bolted together.

Thanks, it feels fully engaged. I stuck my inspection camera between the converter and the transmission bell housing and it "looks" right.

[upallnight]

Originally Posted by marcot1

I've seen conflicting info about resetting the TCM, what is the proper way to do so? New to the BWM world but not cars in general.

Read this article on ZF trans. You may not have the 6 speed but what they say is just as important to people with the 5 speed trans.

Everything about your ZF 6HP26, 6HP19, 6HP28 transmission issues | BMW LOGIC7