e30 M42 Getrag 240 gearbox

[selespeed]

after 7 years and 210,000km, my brand new gearbox has finally failed. lots of grinding noises in 1st, 2nd, 3rd and 5th gear. But 4th gear is perfectly smooth and quiet. I have no idea what happened. gear oil is changed two months ago and the oil mysteriously disappered, while there doesn't seem to be any cracks on the housing nor leaks at the output shaft seal. A lot of fine iron specks due to grinding deposited at the drain plug. This problem happened after i climbed and descended from twisty roads in mountains. a lot of fun and expensive repair now.

I believe the internals - syncros, bearings are done. Therefore, I have to get a known good one. Its is too expensive to repair and may not have parts since this is a very old gearbox.

I have a RHD car, would a gearbox meant for LHD fit well? The part # for my gearbox is BMW part # 23 00 1 222 035 = 240.0.9005.62 (GETRAG number Getrag 240). I cannot get much info from bmwfans.info

Now I have come across so many variants in eBay of this for e30/e36, with all different #s. How do i know the transmission ID is the right one (gear ratios)? And many seem to have different #s on the housing. A gearbox meant for e30 m40/m42 USA will it definitely fit my car? Mine is a european version of e30 september 1989.

Getrag Germany told me the lifespan of this old gearbox is roughly 250,000km and it is best to get one with roughly 100,000 plus km.

Please help me with your experts advice.

Thank you

teo

[selespeed]

i have found a gearbox with the following tag on the housing

​240.0.0370.90

What does this # mean? According to seller it is from e30 m40. but my # is 240.0.9005.60

Anyone has knowledge of Getrag part # cross refering to BMW #? I am not sure if this means the housing is correct and the gear ratio.

thank you once again.

teo