Technical Tips > Transmissions - Differentials

conversion

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87Z51:
"Aussie 4speed M21 which are the original 'boxes for our C3s"
If your C3 came with a Aussie 4 spd you got ripped off.

"M20= 6cyl Aussie 4sp, M21= V8 Aussie 4sp,
and M22= Muncie."

GM USA use the same no to identify Muncies ;
The M-20 wide ratio,
the M-21 close ratio,
the M-22, Extra heavy duty close ratio"

The Australian GM  manuals were never used in US cars, Muncies , Saginaw and B/W T10 and Super T10 were OEM GM trans.

Given the cost /availability of OE type 4 speeds in Oz (Muncies were last used in '74 so old technology), the above suggestion to use a V8 5 spd would be the better option.

Very little difference in size/ installation , readily available/ cheaper and far superior shift mechanism as all internal , not external linkage.

If you are prepared to risk explusion from the club ,Dellow and others  makes several kits to put "Japanese" 5 spds behind Chevs .The Supra box is very popular as a V8 conversion and well up to handling the Hp of a street smallblock.

FWIW the Super T10 used after '75 (the 4 spd in the C4
4 +3 box ) is generally considered to be stronger than a M22 without the noise.

Watch "Two Lane Blacktop " and listen to the noise the gearbox in the  '55 Chev makes , not a comfortable street trans

87Z51:
Just what you want

http://www.nswcorvettes.com.au/forum/viewthread.php?tid=2699

L71:
I HAVE A MANUAL i WANT TO MAKE INTO AN AUTO
IF YOU STILL HAVEN,T DONE THE CHANGE LET ME KNOW, WE CAN SWAP 0407012359

Cameron 77C3:
FYI (For Your Own Info)

You might be better to u2u JP as this thread was started back in November of last year.

It always pays to check the post date of a thread as you may be replying to a subject that is long dead and buried.

You also have a U2U that I have sent you.

If I can assist in any way, please do not hesitate to contact me either here or by phone on 0418 674 441.  We live fairly close to each other.

Cam
Forum Admin ;42

Cameron 77C3:
L71  I have u2u Jp for you as requested on the phone.  He has no other contact details listed in his profile so thats all I can do for you at the moment.

Cam

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