M21 ONTO RED

[dieselwagon]

2nd gear on my M20 went AWOL on way home from Bright other week. Ive got a spare M21. Is it as simple as changing input shaft from M20 into M21 and installing. This mite get me mobile while i build up the motovation to do a 5sd update!!!!

[Blacky]

Firstly , welcome to the forum - why not just swap the whole box over instead of rooting around changing input shafts? I have a feeling an M21 input shaft would be different to an M20 - the amount of teeth is different.
I was you , I'd sell the M21 to a Torana restorer and use the money for a 5 speed and probably a holiday to the gold coast

[Dee]

Think your right Blacky - don't know fur sure but know all the ratios are different except top - funny that..

You might also like to check which motor the box came from - I think the V8 boxes have a different splined input shaft - but cant remember - too long ago...

I wouldn't want to pull an aus box apart and tinker with changing stuff from a different box.. they can be very sloppy at the best of times - I'd keep all the stuff in one box and do as Blacky says - unload the dodgy one as a "needs repair and overhaul kit" sale..

Dee

[dieselwagon]

Thanks guys looking at a couple of M20 on evilbay due to the fact i just blew my 5spd cash on a WB panelvan yesterday. Fingers crossed the next one will last a little longer!