'87 e30 5s trans compatible with '89 525?

[Gene in NC]

Will the rebuilt 5s trans from what's left of my '87 325is fit the '89 525?

[Interceptor]

Will the rebuilt 5s trans from what's left of my '87 325is fit the '89 525?
They both have M20 engines, right?

[Gene in NC]

Right, but my usually reliable recycler claims that '89/'90 525 5s is unique. May have something to do with trans mount design in the e34. Was hoping that a single spare might cover both '89 e34 and '87 e30 325 is.

[Jeff N.]

If you can provide the last 7 digits of the VIN number from both vehicles, it's possible to cross reference the part numbers.

Be aware there are very subtle differences between models. Case in point - the Getrag 260 tranny from the E28 535 and the E34 535 are virtually identical. Same housing, gear ratios, etc. Side by side, you would swear they are the same. The only difference is the construction of the output shaft. It's about 10mm long and has a different taper such that the E34 driveline is that same 10mm too long and won't center right. You'd likely discover this as you try to button up your project.... :)

If the tranny part numbers aren't identical - I'd be extremely wary.

Jeff

[Gene in NC]

Jeff, can you do the cross reference?
'89 525 BC89633
'87 325is 2968115