m20 gearbox on an m40?

General E30 related discussions -
Please put technical questions in E30 Tech Help forum below

Moderator: martauto

ross_jsy
Married to the E30 Zone
Married to the E30 Zone
Posts: 7307
Joined: Sun Jul 12, 2009 11:00 pm
Location: Jersey, C.I.

Post Tue Jan 21, 2014 1:53 pm

Will the above combination fit?
age
Formerly twist316
Posts: 448
Joined: Sun Dec 28, 2008 11:00 pm
Location: cork ireland (kosice slovakia)

Post Tue Jan 21, 2014 2:19 pm

yes it will fit but will sit at an angle, the same fitting an m20 box on an m52.

you will need to use the prop from the m20 though as the prop is a different length cira 100mm or something like that.
Last edited by age on Tue Jan 21, 2014 2:25 pm, edited 2 times in total.
M40 rightness if you can get to 6000rpm noone can hear your tappets
ross_jsy
Married to the E30 Zone
Married to the E30 Zone
Posts: 7307
Joined: Sun Jul 12, 2009 11:00 pm
Location: Jersey, C.I.

Post Tue Jan 21, 2014 2:21 pm

m40 prop? Not the m20 one?

Would be going into an auto if that makes any difference (not mine, I would leave the box attached to a decent engine!)
age
Formerly twist316
Posts: 448
Joined: Sun Dec 28, 2008 11:00 pm
Location: cork ireland (kosice slovakia)

Post Tue Jan 21, 2014 2:25 pm

sorry got that backwards, (edited to stop confusion in future)
the m20 prop is what you need.

ah, i thought it was a manual,
but i'm sure the same applies, check the gear ratios though to be sure they are suitable, i presume they are
M40 rightness if you can get to 6000rpm noone can hear your tappets