The Rebuild of a Legend
"Chapter 15 - Richmond Street 5-Speed
& Hurst Shifter"

We're replacing the original M-21 Muncie 4-Speed with a new Richmond Street 5-Speed manual transmission. "Why?", you may well ask.

One of the limitations of the old 4-speed design was the choice we were all forced into making between eye-popping acceleration off-the-line or reasonable R.P.M.s at highway speeds.

The addition of the extra gear in the Richmond solves this problem, even without an overdrive gear. (NOTE: 5th gear is still at 1.00:1 just like in the original Muncie 4-speed).

Here's a spreadsheet I made up to demonstrate the results of using different rear gears and transmissions.

You see, by changing out the formerly-installed 4.56:1 rear gear set for a highway-liveable 3.08:1 rear end, we solve the highway cruising problem (just 2,300 R.P.M. at 60 mph).

And because 1st gear in the Richmond is a stunning 10.10 overall ratio (3.28 times the 3.08:1 rear gear) we get astounding off-the-line performance too....slightly better than a 4.56:1 rear end combined with the 2.20 1st gear in the old Muncie 4-speed....Tada!

The Richmond 5-speed has arrived. Here's a comparison between it (on the left) and the original M-21 Muncie 4-speed (on the right).

The original transmission mount, used with the Muncie 4-speed is in place in this photo.....but with the Richmond 5-speed. As you can see to the right, the mount boss (marked A when you enlarge the photo) on the Richmond is further to the rear (left in this photo) than where the Muncie mount boss sits on the mount (marked B on the enlarged photo).

Click on photo to enlarge.

After careful measurements and marking, we cut 2.75" out of the original mount with the band saw. When measuring your car, be sure to allow for things like the scattershield "block plate" if you're going to use one.

We're going to discard the entire centre section, replacing it with a piece of 1/4" plate to give us something to weld the two remaining pieces to.

Now that it's welded together, all that remains is some cleanup and painting with POR-15.

It's installed..........and the Richmond 5-speed
is finally home where it belongs.

A big thanks to ML67 (Corvette Forum member) and RichsCorvettes
(CF and Corvette Action Center member) for excellent advice on
modifying the transmission mount bracket.


The Hurst Shifter to the left is part #407 0009, but the stick is all wrong for a 1967 Corvette. It should be shorter and straight with a round chrome shaft and ball and a reverse lockout "t" handle.

In order to replicate the appearance of the original shifter on the Munice 4-speed, we ordered #407 0015 (shown fresh out of the box above) and replaced the straight (but flat) stick with the original-appearing stick to the right. The reverse lockout "t" will be non-functional with the Richmond 5-speed. It will, however, look like a 1967 shifter. The part number is ST-327 from Zip Corvette Products.

I couldn't resist installing something on the day after Christmas, so I snuck out to the garage.

You wouldn't know there was a Richmond 5-speed hiding under there, would you?

The decision was made to fabricate a completely new driveshaft. The Richmond 5-speed output spline required the use of a TH400 yoke on the front of the driveshaft; much larger than the stock yoke. We wanted additional strength, so a new shaft with thicker walls was used.

A heavy-duty Spicer u-joint
was used at the tail-end.

Click on the above images to see larger photos

Balanced and ready for paint.


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Last modified: September 08, 2014