transmission / TOB question

[ColonelMustard]

I'm planning on replacing my broken m52 engine in my swap, and want to address an issue when I do it.



The swap is a m52b28 in an 1987 325e. I used the transmission from the e30 on the m52 and it all worked out fine for the most part.


What TOB should I be using?


I used a clutch kit for a 325i e30 when the transmission was installed before and used the TOB from the kit. Do I need to have a longer TOB since the transmission originally had a dual mass flywheel that I swapped out with a single mass?



I ask because could hear a bearing noise (mostly like a rough turning bearing, sometimes a slight rattle), when the clutch was not depressed. It would go away if I depressed the clutch. Is this a TOB length fitment issue or something else?

[ForcedFirebird]

24v and m20 use the same TOB.

The noise you hear is the Getrag rattle. Very common in all Getrag's, not just the ones in e30's, if you Google it, you will have many hits.

[ColonelMustard]

Between the getrag rattle, the vanos rattle, gunked up hydraulic lifter tick, and injector noise I'm begining to think a quiet running BMW is basically a unicorn. An expensive, rebuilt unicorn.

Thanks for the input.

[wworm]

Between the getrag rattle, the vanos rattle, gunked up hydraulic lifter tick, and injector noise I'm begining to think a quiet running BMW is basically a unicorn. An expensive, rebuilt unicorn.

Thanks for the input.

pretty sure a non rattly bmw doesnt exist unless you're sittind directly behind the muffler and the exhaust hangers are fresh and broken in lol

[ForcedFirebird]

Actually they are fairly quiet with a dual mass flywheel, but everyone takes those out.

[ColonelMustard]

Yeah I could see that helping, but when you can get a single mass flywheel resurfaced for reasonably cheap, it makes spending several hundred on a new dual mass not worth it. That was my logic at least...