Tranny/Rear Diff Question

[SoopaGhetto]

ok, ive searched a lot and came across a few things but no deffinate answers. (in the m42 section)
i need to know:

-Does a e30 m42 transmission fit the m10 exactly? (as in strate bolt on)
some say its 240 like the m10 others say its 260 (which is the m20) then some say that the m20 tranny can fit the m10 but its just heavier

-Also does all e30 m42 come with the 4.10 diff? (either lsd or non lsd)
i know the m10 had either 3.64 or 3.91 depending on production yrs

[mode]

M42 trans will not fit an m10

M42 comes with a 240 Getrag

[SoopaGhetto]

the m10 318i has the getrag 240 too

[asubimmer]

the m10 318i has the getrag 240 too

same tranny diff bell housing

[SoopaGhetto]

i c i c sooo do you know what trannies fit the m10/m42 bell housings?

[asubimmer]

iirc the s14 tranny (265) will fit an m10 (240). The m42 (240) fits the m50's.

[SoopaGhetto]

sweetness thanks mang!

[SoopaGhetto]

how about the 4.10 diffs? i found a 91 318i and i want the diff...i want it now....but only if its 4.10 or 3.91 but more so if its 4.10

[asubimmer]

all the 91 318's had a 4.10 that I know of. Some were open and some were lsd, not depending on if it was an i or is. It was an option but not standard on the 318is.

[a3ternus]

all the 91 318's had a 4.10 that I know of. Some were open and some were lsd, not depending on if it was an i or is. It was an option but not standard on the 318is.

A 3.91 on a four speed M10 makes for a 4200rpm at 70mph aprox.
Mind you,the ratios are exactly the same as the 5 speed manual.
N.