m20 and m21 gearbox ratios

Moderator: martauto

age
Formerly twist316
Posts: 448
Joined: Sun Dec 28, 2008 11:00 pm
Location: cork ireland (kosice slovakia)

Post Fri Jan 16, 2015 11:46 pm

anyone have any idea on the ratios of the m21 gearbox compared to the m20b25 box?
M40 rightness if you can get to 6000rpm noone can hear your tappets
Top
age
Formerly twist316
Posts: 448
Joined: Sun Dec 28, 2008 11:00 pm
Location: cork ireland (kosice slovakia)

Post Wed Jan 21, 2015 8:30 pm

anyone?
M40 rightness if you can get to 6000rpm noone can hear your tappets
Top
User avatar
Brianmoooore
E30 Zone Team Member
E30 Zone Team Member
Posts: 49359
Joined: Mon Jan 10, 2005 11:00 pm

Post Wed Jan 21, 2015 9:41 pm

You mean the box fitted to the E30 324d and 324Td?
According to the E30 handbook supplied with our cars, The 324d uses the same ratios as the 320i, and the Td uses the same ratios as the 325i.
Both auto versions use a box with first and second gears unique to the diesels.
Top
age
Formerly twist316
Posts: 448
Joined: Sun Dec 28, 2008 11:00 pm
Location: cork ireland (kosice slovakia)

Post Wed Jan 21, 2015 10:05 pm

thanks Brian.
M40 rightness if you can get to 6000rpm noone can hear your tappets
Top
DanThe
E30 Zone Team Member
E30 Zone Team Member
Posts: 28649
Joined: Sat Sep 10, 2005 11:00 pm
Location: Staffs

Post Wed Jan 21, 2015 10:06 pm

Im sure the td box I have has a larger output flange than the usual M20 box, same as a later ZF
Top
User avatar
Brianmoooore
E30 Zone Team Member
E30 Zone Team Member
Posts: 49359
Joined: Mon Jan 10, 2005 11:00 pm

Post Wed Jan 21, 2015 10:11 pm

DanThe wrote:Im sure the td box I have has a larger output flange than the usual M20 box, same as a later ZF
Confirmed by a quick look at the guibos in the ETK. Td has the larger one with 12mm bolt holes.
Top
age
Formerly twist316
Posts: 448
Joined: Sun Dec 28, 2008 11:00 pm
Location: cork ireland (kosice slovakia)

Post Wed Jan 21, 2015 11:14 pm

cheers lads.
i have the option to go with a 324d, 324td, or e34 m20 box. i presume the e34 box would be the one to go for?
M40 rightness if you can get to 6000rpm noone can hear your tappets
Top

Return to “M20 Engines”