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post #1 of 8 (permalink) Old 09-17-03, 09:56 PM Thread Starter
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Eeew, Holden

I haven't turned but brother in law is chasing an M21 and silly me said I'd find him one, but not knowing anything about holden bits I don't know what I'm looking at. Can anyone tell me how to spot the difference between an M21 and the weaker and cheaper M20?


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post #2 of 8 (permalink) Old 09-21-03, 03:25 PM
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Re: Eeew, Holden

M21 has a 2.54 ratio first gear. M20 has a 3.05 ratio first gear. Do a ratio check will tell. They also have ID grooves on the input shaft, M21 should have two grooves, but this is not a given.

If you're not driving a manual you're really just steering.
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post #3 of 8 (permalink) Old 09-22-03, 06:01 PM
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Re: Eeew, Holden

ALso the M21 (v8 box) has a longer input shaft and so will not fit a 6.

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post #4 of 8 (permalink) Old 09-23-03, 03:11 PM
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Re: Eeew, Holden

M20, M21, M22 are available in both V8 and six cylinder input shaft lengths.

If you're not driving a manual you're really just steering.
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post #5 of 8 (permalink) Old 09-23-03, 06:04 PM
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Re: Eeew, Holden

They are?

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post #6 of 8 (permalink) Old 09-24-03, 03:10 AM
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Re: Eeew, Holden

They are. M21 six cylinder is very rare, was only used in the LJ XU1. M22 six cylinder is very common, was used in one tonner.

If you're not driving a manual you're really just steering.
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post #7 of 8 (permalink) Old 09-24-03, 05:18 AM
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Re: Eeew, Holden

Must have been rare, AFAIK there only was a v8 box.
Oh well, if I wanted a decent v8 box for my panno I wouldn't get the original 4-speed anyway :)

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post #8 of 8 (permalink) Old 09-24-03, 03:25 PM
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Re: Eeew, Holden

Please don't say the words "Decent" and "aussie four speed" in the same sentence. It is offensive!

If you're not driving a manual you're really just steering.
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