Budman68

Not sure if this is old news. The only hang up I see is the shifter pattern changes from the current H pattern to a W pattern. Not ideal for racing.

Heres the info. Standard Transmission offers the service or just the gear set.

The New Muncie 4 Speed Overdrive Gear

If you've wanted an overdrive transmission,but don't want to cut your vehicle up to get the lower RPM, here's just what the doctor ordered!

Available in the close Ratio (2.20 low), this set will fit in your Muncie case and give you a final drive ratio of approximately .87 to 1. Thirteen percent overdrive isn't exactly going to make your Corvette into an economy car, but it will lower the RPM and save your engine a lot of wear & tear. Also, you won't have to worry that your investment has been ruined by chopping up your console, transmission tunnel,or frame.

Jud Chapin

Who offers this, Budman?

jackson

Autogear.net ... RiversideGear.com etc ... ~ $450 - $500

Jud Chapin

Thanks, I'll check it out.

rj8806

While the price is certainly sweet, cutting the car is not an issue with a TKO 5 speed either.


Richard

Budman68

http://www.standardtransmission.com/

TheSkunkWorks

The OD Muncie 4-speed has a narrow ratio gear set (not M22) with third replaced by the OD gear. To maintain the standard H pattern, you just flip the 3/4 lever over. Thing is, you're then running on the 3rd set rather than the true 4th set when you're in top gear, and it's a fairly big ratio step from 1.64:1 to 1.00:1. FWIW, I might consider it for a pickup, but I've decided against it for my Vette.



edit - BTW, if you have a scoop in the long delayed arrival of the Muncie 5-speed, elaboration would be appreciated...

63mako

Here are the ratios on the M21Y (overdrive) 4 speed
2.199 1.506 1.000 0.859

Gordonm

So you have a 3 speed with a .85 overdrive. I'll stick with the 5 speed.

63mako

I have been debating buying the TKO 600 kit for a long time and was ready to pull the trigger. The post on the vibration issues has scared me though. Seems like some put it in and have no vibration at all and some spend thousands more after the install and can't eliminate the vibration. Guess I have to stay with the Autogear M22 and 4.11. I would sell the brand new Autogear and buy a TKO 600 today if I could guarantee a vibration free install.

shmoky

I have to save for quite awhile to pay for a new 5 speed and a vibration problem is not an issue I want to have to play with AFTER installing a new tranny. (especially after having to rebuild the motor on next years budget )

shmoky

TheSkunkWorks

I've just about (99.44%) convinced myself to get that Italian M22 wide gearset and HD mid-plate for my Muncie redux. Got to rebuild it anyway, and can't swing a TKO 600 anytime soon... BTW, it will be ahead of a 3.55:1 rear.

rj8806

While I do understand the hesitation and we make every effort to ensure correct driveline angles with our kit, your safest route is to verify your angles before removing the original transmission and driveshaft and duplicate the angles when installing the new transmission. Doing this before hand is a guaranteed method no matter what transmission you end up swapping to.


Richard

coinwasher

Anybody know about this gear set? It only seems to work in a M21

http://www.riversidegear.com/categor...oduct-166.html

Budman68

I think it's the same.

mrvette

Good God, Guys, WTF is so hard about this, no one can use a freeking tape measure??? assuming the body is on the car, jack it up and measure centerline of output shaft to either the frame or the top of the tranny tunnel, never seen a tranny with laterally offset mounts, not from GM anyway.....so the centerline will remain the same, just to be sure, measure from the frame rail....anything +- 1/8 inch is fine......

if that all fails, leave it up on stands, wheels on, and run it up to whatever offensive speed it vibrates at, then move the tranny around with jacks or prybars untill it disappears.....

but the thread is about muncie o/drive kits, and for .87 whatever, it's a waste of money .67-.70 and they be talking....

rj8806

I think there is a mis-understanding here. The original post was about the new overdrive Munice and the OP's idea that anything else would require tunnel modifications. I was merely trying to point out that a TKO, when properly modified, does not require any modifications to the tunnel.

63mako was worried about a vibration thread that is on-going here and I was trying to clarify that by checking the original angles beforehand and then duplicating them would ensure that the angles remain the same no matter what transmission is used.

Sorry for the Hi-jack...that was not my intention. :o


Richard

Belgian1979vette

This thing was on the other forum also and I will repeat what I said there. An M22 was not only stronger because of the higher nickel content of the gears but also and as much because of the lesser angle the teeth had on the gears and because the spread between the gears was smaller. If you move to a wider spread a lott more load is put on the gears, certainly when doing power shifts.

And for Kiesler : I like your trans package, but for the same reasons as above I still like the angle of the teeth and the gear spread of my original M22. The big problem is high speed use

Little Mouse

You could go with the richmond 5 speed overdrive.

7T1vette

Why "hodge-up" a good 4-speed box. If you need to run lower RPM at highway speeds, put a different gear set in the "pumpkin". You can't get good performance and good economy without going to a 5 or 6-speed tranny. Otherwise, change the rear gear.