Years ago.....I know Auto Gear made Muncie's with a .80 or so OD top gear.......but now it seems they do not.......
Anyone know what happened or maybe have one? There is very little info out there and it seems like a Unicorn......

Jebby

 

Id look up Jodys transmission he is on Chevelles.com almost daily. Bet he knows or could build you one. Guy really knows his manual trannies.

 

Thanks....just Messaged him....

Jebby

 

Ask Paul Cangialosi. Maybe he still sells them?

EDIT - I just looked.....Even the Autogear Supercase is sold out.

Maybe the 5-6 speed conversions have won the war?

 

Maybe you're talking about the gear set that made 3rd into an overdrive gear and you'd flip the shift lever on the trans to keep the same shift pattern? Think it was called the M22X or something like that. From what I understand the gear spacing was horrible and 3rd gear, now overdrive, was very torque limited. Probably got canceled. I really wish someone would make a drop in 2 speed diff though. That would be sweet.

 

Hell yes, Id probably go back to a close ratio M22.
Does the McCleod 5 spd offer a close ratio gearset with a 2.66ish low and a .8 5th
Most these 5 and 6 spds have the std drop between 1 and 2 I miss the close ratio of the M22

 

It was called the M22Y......this just in from Jody's transmissions and the above information is exactly correct.
He now recommends the M22Z.....with a 2.98 first gear and pair this with a 3.08 gear.......

Jebby

 

Im confused, wasn’t the M22 first gear 2.2:1? So now you’re dropping first gear lower, and adding an overdrive gear? Or is this still 1:1 fourth? Either way it still seems to be turning a close ratio trans into a wide ratio.

What am I missing?

 

originally yes, but autogear and others came up with new gear ratios. These are all the letters after the m22. I personally put a m22w gear set in my Muncie. It is the m22 angle of gears with the m20 gear ratios.

 

I have one N24Z The Z=2.99:1 This is the Ratio 2.99:1 1.88:1. 1.35:1 1.00:1

 

For a 'normal' user, the broad torque curve on Chevy engines allows gear spread between trans ranges without much loss of torque. So our engine don't need 8 gear ranges to keep engine torque "happy". A 5-speed with a .67 overdrive final gear is all that is needed. And, some could get by with a 4-speed with .75 final ratio. With the availability of 5-speed OD trannies, you don't need to get an 'odd duck' to achieve comfortable highway travel.

 

N24Z trans 336 gear

28" tall tire 600-800hp Perfect in town or Hwy
Not my ride but I dig it

 

friend had an 82 or so mustang 5.0 they did that from the factory. 1-2-direct-OD. so it was a 3 speed with overdrive ratio where 3rd is supposed to be. and he snapped the front off the main shaft hitting 3rd (direct) too hard. so when i knew him, it was 1-2-OD only. crappy design that was seriously upgraded by the T5 that is now considered woefully inadequate.

 

Close ratio trans is great for racing......but on the street it feels like you grab gears too fast and the first gear is way too high so you run a 4.11 with it and now you can't run on the interstate for long.
Jody at Jody's transmissions and I had a long conversation yesterday and he ironed out some **** in my head that was eluding me......he definitely knows what he is talking about.
One of the biggest points he brought up about the ratios below is that they are spaced as such to have an exact rpm drop in each gear.......this is awesome if you know what it means. You run this trans with a 3.08 gear....and basically you have the same mechanical advantage as a 700r4 automatic.......the 3.08 is a tall highway gear.....so no overdrive needed. My own 72' has this gear in it........this would be a rip behind the 406.
He also said his proprietary case is much stronger than the original........
The beauty of this is that it bolts in.......absolutely zero mods are required.
The trans is $3000. I think I am going to get one as I like the strength aspect and the RPM drop as I intend to take my car to the strip soon......those ratios and slicks will definitely send it into the 11's.
Here is some info on Jody......nice guy: https://www.autoyas.com/US/Reading/7...nsmissions-LLC
Ratios are:
M22Z_____ M22 "close ratio"
2.99:1..........1st..... 2.20:1
2.04:1..........2nd ....1.64:1
1.47:1..........3rd ....1.28:1
1.00:1..........4th ....1.00:1

Jebby

 

Great for racing....bad for street and highway.

But, there needs to be such components which can optimize one's specific desires. For me, that is a 3.36 rear gear with a 700R4 trans: great from a dead-start AND 2100 rpm at 70 mph.

 

I am running the Autogear M22Z with a 3.08. I only have about 150 miles on it but I like it. To your point Jebby, I compared the M21 to the M22Z and found that with the M22Z first gear acts like the M21 with a 4.17 rear ratio; Second gear acts like the M21 has 3.83 rear ratio; Third gear acts like the M21 has 3.56 rear ratio, With the M21 you have a 22% to 28% drop in RPMs between gears and with the M22Z I have 26% to 32 % drop. The big block handles that drop without a problem. It was a true bolt-in.

I bought the unit unassembled directly from Autogear and I assembled it myself. The assembly was pretty easy too. It is basically a beefed up Muncie. There is no typical "Rock Crusher" whine with the new transmission and Autogear explained that the gears were machined to a much tighter tolerance which all but eliminates the whine. One major difference is they run sealed bearings in the front. I was told this eliminates leaks and keeps the dirt out of the bearings.

 

Thanks for the info.....

Jebby

 

On a Muncie 4rth gear is straight through so it couldn’t be less than 1:1...curious about that M22y though.. with 3rd as overdrive...I like that idea but the gear gaps would be huge I awesome. I had a M21 close ratio which is the same gearing as the original rock crusher and it was very tight, first gear sucked out of the lights even with a 3.55 but once you were going it was nice.
I switched to the M20 wide ratio with 2.53 first gear and a 3.70:1 rear. Off the lights was a lot better, highway waS obviously a few hundred rpm worse but it was livable at 75. I just switched to a McLeod 5 speed and it’s incredible. It has the .64 5th gear and highway cruising at 80 to 85 is awesome. In fact anything over 50 sees 5th gear. In my research they only offered the .64 5th gear. Only Tremec has 5th gear options. For the money and ease of installation I would pick McLeod

 

The McLeod 5 speed is no longer available anywhere at any price

Jebby

 

Am I one of only a very few that is not convinced about all these weird ratio's for Muncie box's (and the need for the multiple oddly spaced ratios of some of the OEM type 5 and 6 speed transmissions. M21's/M22's (and their Ford Toploader equivalents) have been the perfect close ratio transmissions for the larger capacity/higher torque engines (or for those happy to 'wind-up' their high revving small blocks). With 600 ft/lbs of torque/6250 rpm redline and 3.08 rear end the M21 couldn't really have a better ratio set - more than enough grunt to get out of 'the hole' on a 2.20 first gear - 2600 rpm at 70 mph in 4th is fine - but a 5th O/D ratio and 1800rpm cruise would be nice. Shame we don't have the 1960's/70's add-on Hone overdrive's anymore.