C1 Transmission

**Mike M.** · May 26, 2003, 08:17 AM

Re: C1 Transmission

rick: see you in nashville but doubt that we'll see the 60 unless you repair or replace the noisy 3 speed. 400+ hp way too much to ask of the 3 speeds chevy put behid the 265 cis starting in 55. It was real easy to blow a speed even with anemic 265s and 283s, having been there and done that. Suggest you upgrade to a muncie 4 speed. recent posts in last couple of days discuss what type of output yolk you'll need to get and the small plate you'll need to fabricate to locate the muncie tranny mount to your c-1 X-member. Mr hurst can supply a shifter( if you want the shifter to look orig, corv cent. sells a 60 style shifter handle that can be attaqched to a hurst 4 speed shifter iff the hurst has a factory removable handle. good luck, mike

**Christopher R.** · May 26, 2003, 09:49 AM

Re: C1 Transmission

Sounds like you fried your transmission. Don't throw it away. It may not be original to your car, but it may have some value. Post the numbers, and somebody will tell you what it came out of. Depending on what it was original to, it may be valuable. The 3 speed shifter may also have some value, especially if it's original.

Sounds like you don't want to fix it. So you'll be replacing it. Your car came with an optional 4 speed. I believe it was a cast iron case Borg Warner T10. You can look for one of those. It'll bolt right in. No changes to the clutch, or mounting. Aluminum case T10s will also bolt in.

You will need a shifter and rods. I believe Hurst still makes shifters for these cars. The usual Corvette vendors also sell reproduction original looking shifters. Decide what transmission you're going to use, Muncie or T10, because the reverse rod is different. You'll need rods with your new transmission and shifter. When you're comparing prices, you'll want to allow for that.

If you fried your transmission on this car in the '60s or early '70s, you'd probably put a Muncie in it. They were considered stronger than the T10s, and they were more plentiful. This was before the NCRS emphasis on originality. Don't lightly dismiss originality to get back on the road. It's bad enough to spend money on these cars. It's worse to spend money on something not original, and end up decreasing the value of the car. Sometimes you're better off to spend more for originality.

Later model Muncies will fit. All Muncies will require you to change the transmission/driveshaft slip yoke. The usual vendors sell that piece for around $125. You'll also need the adapter U-joint to mate the slip yoke to the driveshaft. Not a big deal. Around $15. You'll also need the '62 only transmission mount. Around $15. You may have to change the clutch, depending on what year Muncie you get. '63 to around 1970 Muncies had a 10 spline input shaft. After then, the input spline had a higher tooth count. I believe the speedometer cable was on the opposite side too of later Muncies. And I believe the output shafts on later Muncies were different from the earlier ones. You'll need to know so you can buy the right slip yoke. Obviously an earlier Muncie is an easier swap.

Lots of C1s have Muncies in them. Will cost you to buy some extra pieces to get it to fit. But it's very do-able. Of course the car's worth less in the end. It's going to cost you no matter what transmission you buy, so do the math. Just make sure you take all the costs into account.

Check the "Driveline" for transmission vendors. There's more than 1 in there.

**Joe L.** · May 26, 2003, 11:28 AM

Re: C1 Transmission

Rick----

Here's a few other options, but you'll need to be prepared to "spend some bucks" for these:

1) Get a brand new Richmond Super T-10. You can get these in a variety of first gear ratios, but I recommend the lowest one (it's about 2.64:1, as I recall). This is a real bulletproof transmission and is a NASCAR standard. You'll need to shorten the driveshaft about 3/4", use a special output yoke and conversion u-joint and use the other pieces required to bolt a T-10 into a C1. About $2,000;

2) Get a brand new "Muncie". Yes, you can get one! All of the parts are now being manufactured to build just about any configuration Muncie ever made, plus some that were never originally manufactured (like a WIDE ratio M-22). The case, extension housing, and side covers are not configured exactly like the originals, so they'll not fool any judges but these are VERY sweet pieces. Much improved over the original design. The case, extension housing, and side cover are made by Auto Gear of Syracuse, NY. The gears and internal parts are made by Massiero S.A. of Italy (one of the largest manufacturers of gears in the world). There are folks out there assembling these things from the all-new pieces. They sell, completely assembled, for about $2,500.

**Rick Krason** · May 26, 2003, 08:01 PM

Re: C1 Transmission

Do you know if the yoke was the same as the 1960's, or will I have to see once I count the splines. The bellhousing and such should just bolt up I assume, then the mounting bolts just get pushed back a bit further? Will I need to shorten my driveshaft? If so, might just as well get a new/appropriate yoke for the back of the trans, right?
Rick

**Ed Jennings** · May 26, 2003, 08:30 PM

Re: C1 Transmission

You will need a yoke for the Muncie. I believe it is the same yoke that was origianlly used with the PowerGlide. Readily available from Corvette Central, Zip, etc. You will also need a 62 trans mount. The driveshaft itself is ok. It's pretty much a bolt in deal, you just have to have the right assortment of parts.

C1 Transmission

C1 Transmission

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