The gearbox is the Getrag 280/5 and is the same as that fitted to the E24 M635 CSI .
Taken from BMW M Registery website :
All E28 M5s have the Getrag 280/5 five-speed manual gearbox. Gear ratios are as follows: 3.51 (1), 2.08 (2), 1.35 (3), 1.00 (4), .81 (5).
What kind of gearbox does the E34 M5 have? All M5s built before May of 1994 utilize a Getrag 280/5 five-speed manual gearbox with the following ratios: 3.51 (1), 2.08 (2), 1.35 (3), 1.00 (4), 0.81 (5).
This would suggest that an early E34 M5 Getrag 280/5 gearbox could be fitted to an E28 M5 but I have never actually done so .
Perhaps , some of our more esteemed members could confirm ?
D
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Better a day as a tiger than a lifetime as a sheep !
From my understanding, the dogleg is not the most favoured of gearbox's - if starting from a clean slate, what gearbox/transmission would people on this forum install in an E28 M5 in trying to keep it as original as pssible in terms of ratios but improving what may have been a flawed design with hindsight.
Cheers !
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when trouble comes it comes not in single spires but in battalions.
There was never a dogleg gearbox in the E28 M5 as far as I know. They all have a standard pattern box. I believe the dogleg box was only offered on the M535i.
You can't fit an E34 Getrag 280 to an E24/E28 as it is missing the holes for the speed / rpm sensors in the bell housing, however, the early 'box can be fitted to the later cars. I've had to do this on a few occasions when an E34 box has been beyond economical repair. If you are stuck , a 260 overdrive from an 84 -> 535i/635i will fit, provided all the external selector parts are swapped with it. The prop will need to be extended on it's splines about 25mm too - you will need to check if there is adequate length on the splines to accommodate this extension safely !
HTH
Phil
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'02 M5 Lemans / Silverstone
Milltek Full system with 100 cell racecats
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