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How much does a "built" M22W have?

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Old 02-16-2017, 02:18 PM   #1
DZAUTO
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Default How much whine does a "built" M22W have?

I've been rebuilding 4spds (mostly Muncies) for 50yrs, but never built one with aftermarket M22 gears. In the past, all M22s were close ratio, but now there are different M22 ratios available, such as the M22W gear set (wide ratio like an M20). I've just built my first M22W for the Chevelle and I am curious if the whine will be as noticeable as a regular GM M22.
Anyone have experience with an M22W gear set? I'm HOPING it will whine like a regular M22.
If all goes well, and it sounds good, I may build 2 more!

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Old 02-16-2017, 02:47 PM   #2
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Originally Posted by DZAUTO View Post
I've been rebuilding 4spds (mostly Muncies) for 50yrs, but never built one with aftermarket M22 gears. In the past, all M22s were close ratio, but now there are different M22 ratios available, such as the M22W gear set (wide ratio like an M20). I've just built my first M22W for the Chevelle and I am curious if the whine will be as noticeable as a regular GM M22.
Anyone have experience with an M22W gear set? I'm HOPING it will whine like a regular M22.
If all goes well, and it sounds good, I may build 2 more!
Hi Tom,

I have one of each.....................M22 wide and M22 close ratio. I must say that I was a bit disappointed that the wide ratio one did not whine as much as the close ratio did. I thought it was just me..............but maybe not. Any idea why there would be a difference in whine? I guess I'm just "whining" about it.

Thanks,
Rex
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Old 02-16-2017, 03:49 PM   #3
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I have not installed the M22W in the Chevelle yet, so I can't say how noticeable the whine will be. That's why I inquired here. I thought maybe someone might have personal experience with a M22W.
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Old 02-16-2017, 04:04 PM   #4
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Hi there!

Be careful; there are (2) different M22W gearsets on the market
The asian manufactured M22W does the same thing GM did to create an M20 from an M21; that is they kept 1st, 2nd, and 3rd on the mainshaft the same as an M22, and just changed the input and cluster. This gives you an approximate ratio split of (2.56/1.90/1.48/1.00) depending on their exact gear geometry, these numbers could be off by a tiny bit.

AG Italian made M22W uses a unique set of gears to give the ratio more balance - more like a ST10 2.64 ratio set. Ours is (2.56/1.75/1.36/1.00)
In essence, youre getting a close ratio 2,3 & 4 with the wide ratio 1st.
This is for moderate road racing, drag racing and to counter the big drop from 3rd to 4th that some people complain about on the M20-type ratios.

Noise is tooth-to-tooth spacing errors; maybe oddball spacing, a rough surface finish, etc. Because OUR stuff is made to print and is done using tighter tolerances it can tend to be a little quieter.
This stuff is on a bell curve, even GM got the tolerance stack up just right occasionally and some of their boxes will be inherently quiet.

Ive been here 7 years, and the number of people complaining that its not loud ENOUGH far outnumber the guys complaining they're too loud.

If you have Italian synchros and the high quality forged synchro rings; try Royal Purple 75w90 "MAX GEAR". It will give you a little bit more noise. If not RP; try the Brad Penn 80w90 'classic gear oil'
Slightly underfilling the unit (since the fill-port in the muncie migrates from casting to casting quite a bit); as long as you have AT LEAST 1-QT, will improve shifting, run cooler and be a LOT less likely to leak past the front nut. This is exacerbated by the 'tail-high' rake some of us like.

Some of this 'too quiet' stuff might also be the fact that none of us knew what earplugs were until we were closer to middle aged, so its not as loud as we remembered. Some of you played games with ATF and even 30wt engine oil in gearboxes which made them VERY loud LOL
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Old 02-16-2017, 05:10 PM   #5
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I have the 2.56 Italian gear Autogear trans (case and gears) in my 66. To me it is quiet and isn't bad. I am not a good judge as I have very loud GNM Sweet Thunder sidepipes you can't hear **** over those.

For the last 16 years I have used either Jerico's or the Gforce G101 in my Nova which all have straight cut gears which are loud. So gear whine to me is all relative. I have am very happy with my Autogear box. For what you get I think the price is quite reasonable.

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Old 02-16-2017, 05:46 PM   #6
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Hi there!

Be careful; there are (2) different M22W gearsets on the market---------------------------------------------------------------------LOL
I have the Italian gears, with 10/27spline shafts, got them from Larry Fischer and put them in a 661 case. I was REALLY hoping you guys would tell me that the M22W gears had very noticeable whine!!!!
Oh well, we'll see----------------------------

Buy the way, I've also just finished building a 2.73 12bolt posi to go behind the SB400/M22W for better hiway economy.
I acquired a mint R&P gear set and the posi was in excellent shape (came out of a full size 4dr Pont, thus probably never abused. EVERYTHiNG else inside is new. The complete 12bolt housing came out of a 71 El Camino that was in line to go into a crusher in about 30min. Gave $75 for it and my son and I were stroking to remove it! WOW, what luck!




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Old Yesterday, 06:29 PM   #7
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Quote:
Originally Posted by DZAUTO View Post
I have the Italian gears, with 10/27spline shafts, got them from Larry Fischer and put them in a 661 case. I was REALLY hoping you guys would tell me that the M22W gears had very noticeable whine!!!!
I've built many of these transmissions. Noise is subjective. One point that wasn't mentioned is main case accuracy. The AGE case, mid plate and extension are far more accurate than the GM parts. It's a night and day difference when you assemble them. People often bush stock cases moving the centerline and you can get more noise. Distortion due to heat treat is also not as severe as it was in 1960's & 70's. The M22 gears that use ground gearing in the M23 series( our DS models) will have a different noise than conventional hobbed gears.
Watch the video below: Fast forward to 7:20 This is a Spec25 M22 I built with shotpeened and surface enhanced Italian gears. Very noticable whine

Last edited by 4speeds; Yesterday at 06:30 PM.
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