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Hi All,The M20,M21 & M22s used at different times in different Australian cars seem to have different names in other parts of the world, I noticed a transmission businesss ad on some USA sight and was wandering if they were available and which overhaul kit would suit our HK 81837 gearboxes and they seem to use some other language or is it just me can't read and understand American. This all come about when my mate to visit from the USA said he could'nt find me a 67-68 Camaro to bring with him, so I asked him to at least bring me some spares for the Monaro that are not so easy to get here in OZ. ie. maybe an overhaul kit for the gearbox,can someone enlighten me. ,,,,all the best regards ..Jack
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Jack
M20, M21 and M22 are not gearboxes but codes for gearboxes used throughout GM. For example, an M20 is the code given to:
Opel 4spd in HK-HG;
Standard ratio aussie 4spd in 6cyl, 253 and some 4cyl for HQ-WB, VB-VK, LC-UC;
XU-1 aussie 4spd (different ratios to normal M20);
Gemini 4spd;
and maybe others ive neglected to mention.
Youll find in the US an M22 is a close ratio helical cut geared Muncie but over her it is used for the wide ratio aussie 4speed in HQ-WB and for the wider ratio (2.85:1 1st gear) Saginaw in HT.
Also M21 is used for the normal Muncie and Saginaw boxes in the US. GMH used M21 for the V8 Saginaw in HK-HG and some 6cyl HK-HG, but they used MC7 for the Muncie in HQ.
So your mate will be able to get you Saginaw bits. Your best bet is getting the HK M21 ratios to him ad theyll be able to give him the right bits. 2.54:1 is the 1st gear in the HK M21.
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The problem is using the codes M20 etc. in trying to describe one type of gearbox when it is only a sales option code that can describe many other gearboxes in other model cars.
When we use M20, M21 & M22 etc. it is usually understood that we are referring to GM-H manufactured Aussie 4-speed manual gearboxes. Many people do not know that M20 can also apply to an Opel 4-speed or a Gemini 4-speed. M21 & M22 can apply to Saginaws when used in HK/T/G series cars.
If you go to the USA & ask for parts for an M22, theyve never seen or heard of an Aussie 4-speed so they will give you bits for a Muncie or similar.
What I getting at is, not to use the sales codes (M20 etc.) to describe gearboxes, its best call them what they actually are.
I can remember, a number of years ago on another forum, a guy asked how he could convert his 1970 GTR Torana (with an Opel) to an M20. I couldnt help it, I think I just had a bad day, so I replied, your Opel gearbox is an M20, no need to convert.
Dr Terry
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Thanks fellas. So you mean they are not all saginaws and the m20, m21 & m22 bit really only relates to the gears and various ratios. Does that mean they are the same thing except for a few more or few less teeth here or there and nothing to do with the strength of the whole unit.Sorry fellas I got buggered up when they changed the colour from grey to red in 1963..all the best regards...Jack
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M20, M21, M22 are sales codes. They do not specify the actual brand of gearbox or gear ratios. Like if you ask for a pie and a can of soft drink at the bakery? What flavour pie, and what flavour drink? Then add Sauce? and what size drink? If it is old or rare - Cut it! http://www.ehlimo.com.au/ |
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Saginaws wee only used in HK-HG. HQ on used aussie 4spds except in HQ 350 manual which was a Muncie. Youll be able to get Saginaw bits from the USA.
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If we all had the same (good) taste, who would buy all the Fords? |
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If we all had the same (good) taste, who would buy all the Fords? |
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