33 replies to this topic

[LJ RB30]

I'm thinking about getting an M22 from this mob, seeing as the dollar is good.

http://www.tbtrans.c...ed.htm#new_unit

Anyone tried one?

I'm looking at putting it in my LJ behing the RB30.

I have not been able to track down a billet slip yoke for the R33 box currently in the car.

So far i have twisted 3 slip yokes and twisted & bent the output shaft of the box.

So i just want to smash this R33 box into very small pieces for paper weights/doorstops!

It doesn't look like i'm gunna ever get the car over the pits so a 4 speed will be fine.

I have a M20 Muncie in the shed & was going to buy a M22 gearset & steel sandwich plate to put in it but seeing as i can get a whole new box for $1775 + postage etc....
i was thinking of doing that.

But want to hear any feedback about these boxes.

Cheers

[myss427]

Go the Super T10 for that money, a little stronger, they don't whine like Muncies do. Same bell housing, shifter but bigger main shaft 32 spline. 26 spline input.

[TerrA LX]

So far i have twisted 3 slip yokes and twisted & bent the output shaft of the box.

Pretty serious RB30.

[LJ RB30]

So far i have twisted 3 slip yokes and twisted & bent the output shaft of the box.

Pretty serious RB30.

Thanks for the reply's guys,

Terry i wouldn't say it was that serious, it has 403rwhp & over 500ftlb of torque (estimated) at the flywheel. The motor is not much more than a rings & bearing rebuild, prepped rods, little cam & springs with a GT3076 turbo. But i have twisted the splines & bent the uni eyes on 2 supposed Heavy duty Hardy Spicer & twisted a VL turbo yoke with hurt the output shaft. I'm now on my 4th yoke that has bigger uni's & 3rd tailshaft. The R33 gearbox was noisey when i got it so i put bearings & syncro's through it but it wasn't long before it started to crunch 4th & now the output!!! I'm over it

The max torque figure Richmond gear are quoting for the Super T10 is 375ftlb with the 2.43 first gear.

Does anyone know the Muncie's figures?

The car only see the drag strip & the odd run around Barbagello these days, so 90% of the time it gets pushed hard!

[ls2lxhatch]

The 500 ft lb torque figure seems a little high considering the 403 rwhp figure. Where did the 500 ft lb figure come from?

[LJ RB30]

The 500 ft lb torque figure seems a little high considering the 403 rwhp figure. Where did the 500 ft lb figure come from?

[76lxhatch]

^ Nice number

M22s were built for big block V8s so they'd have to be able to withstand a certain amount of torque! Related to the T10/Super T10 in the gearbox family, in an aftermarket/new box I'd have to think they would be of similar strength and performance...?

a rock crusher earnt its name for the straight cut gears

Not quite straight cut, but less angle than normal.

[yel327]

The beauty of an M22 is the noise it makes! Go get a copy of American Graffiti and listen to Harrison Ford's rod in the drag race. You can hear the M22 whining away.

For big power, go the M22 everyday. These were meant for big blocks, and lived behind engines like the ZL1 427. Bob Jane used one on his Australian Touring car championship winning ZL1, and the boxes were modded using a steel sandwich plate. You won't kill one with an RB30. Tougher than just about any othr production 4spd you'll ever find.

[TerrA LX]

According to the rebuild storey of bob's camaro they fabricated the entire gear box housing out of plate steel to hold it together back in the day, not just the sandwich plate.
I would say the only thing standard in that box would have been the front and rear seals.

Edited by TerrA LX, 01 January 2011 - 11:12 PM.

[ls2lxhatch]

The torque figure is impressive. They appear to be plotting flywheel torque and rwhp which explains why the two figures do not correlate.

500 ftlb at 4750 RPM = 452 fwhp

HP = ( Torque * RPM ) / 5252
Torque = (5252 x HP ) / RPM

[yel327]

According to the rebuild storey of bob's camaro they fabricated the entire gear box housing out of plate steel to hold it together back in the day, not just the sandwich plate.
I would say the only thing standard in that box would have been the front and rear seals.

I don't remember that, but you may be right. I remember reading they made a steel sandwich plate and a thin steel plate at the front so that the cluster was held at both ends by steel not alloy, as the cluster and main shaft were forcing each other apart from the torque of the engine. Remember we are talking a box behind an RB30 here, not a full race prepped ZL1 427 with race slicks! Those new M22 boxes will handle most road going big blocks, so it should laugh at a turbo 6cyl.

[myss427]

Got to remember how old the M22 is, first came out in the early 60's. The Super T10 was the newer replacement for the M22 very similar with improvements. And you can buy them brand new, most M22's are rebuilt and had a hard time behind all those big blocks!

[yel327]

Actually most M22's are brand new. You wouldn't bother with an old one now unless you were doing a concours resto on a Camaro etc. Agree the Super T10 is a great box, but the T10 itself is an older design than the Muncie. It was originally built for the 1957 Corvette by Borg Warner. Plus the T10 doesn't make nice M22 noises!

[DanWA]

steve thomas bahaha

[LJ RB30]

The torque figure is impressive. They appear to be plotting flywheel torque and rwhp which explains why the two figures do not correlate.

500 ftlb at 4750 RPM = 452 fwhp

HP = ( Torque * RPM ) / 5252
Torque = (5252 x HP ) / RPM

Yes it's rwhp & flywheel torque (that why i said "estimated" torque)

I'm still keen on a new M22 cose i just recieved a slip yoke from Summit to suit and with the updates the M22 have ie.. thicker case, cast sandwich plate, needle rollers on the selector shafts, all new, it a much better option than the old M20 muncie in the shed.

As for the noise? I can live with it, especially if it holds up to the brisk diving/drags.

Can anyone come up with some torque figures for an M22 yet? Would be nice to have some numbers to compare.

Be studying this thread as well

http://www.gmh-toran...pic=50646&st=25

but no muncie's.

Keep the thoughts coming guys

[yel327]

Maybe email this guy and talk to him. He does both Muncie and T10:

http://fourgeartrans.com/index.html

[76lxhatch]

Can anyone come up with some torque figures for an M22 yet? Would be nice to have some numbers to compare.

You'd have to ask the supplier you're considering buying from if they have any numbers, otherwise its just guesswork as the newly constructed boxes will generally have certain changes to remove the weak points of the originals.

A bit of a search gives popular opinion that GM never officially rated the M22 but numbers for the factory version may well have been around 450-500lb-ft. Assuming the above (i.e. weak points such as flexing cases etc have been removed), you'd have to be well in the ball park.

[rexy]

The torque figure is impressive. They appear to be plotting flywheel torque and rwhp which explains why the two figures do not correlate.

500 ftlb at 4750 RPM = 452 fwhp

HP = ( Torque * RPM ) / 5252
Torque = (5252 x HP ) / RPM

Yes it's rwhp & flywheel torque (that why i said "estimated" torque)

I'm still keen on a new M22 cose i just recieved a slip yoke from Summit to suit and with the updates the M22 have ie.. thicker case, cast sandwich plate, needle rollers on the selector shafts, all new, it a much better option than the old M20 muncie in the shed.

As for the noise? I can live with it, especially if it holds up to the brisk diving/drags.

Can anyone come up with some torque figures for an M22 yet? Would be nice to have some numbers to compare.

Be studying this thread as well

http://www.gmh-toran...pic=50646&st=25

but no muncie's.

Keep the thoughts coming guys

Now thats a proper torque curve! Who wants to chase power at 8000rpm when you can have this instead. This would be a great street driver with no need to row madly through the box to find those gaps in traffic.

Have you thought about staying japanese?
The R154 boxes are very torque friendly. I have tried and failed to break mine for about ten years behind a 480 ftlb flywheel 383 holden running drag radials. Its lasted over 80,000km so far.
R

[LJ RB30]

finding one at a reasonable condition and price may be a problem nowdays
but rexy

^^^^ Yes looked at the R154 before buying the R33 box, they were hard to find & expensive, then of unknown condition.

Another issue with jap boxes is that if you want genuine parts from a local dealer they want a vin No or month/year of manufacture.

This is usually impossible if you bought just a box from someone who didn't have the rest of the car.

I also had certain local Nissan parts guys tell me if the car wasn't sold through Nissan Australia they wouldn't support them, even though i bought parts for the same box a week earlier from the same place!

All depends on who you get when you ring or walk in.

But i have since found another local part guy who has been bloody brilliant & gives an extra effort!

Most 5-6 speeds are rather large as well, i had to massage the tunnel for the R33, i was trying to cut the car as little as possible which is why i started with a supra 5 speed (that is now sitting in the corner), at least the muncie is small & i only have to box a small section around the shifter as i fiitted my M20 to an LC i had many years ago.