Powertrax TRANSMISSION - Manual (Page 5)

To install the 5-speed, the transmission mount must be moved to the rear 2.25”. This has
been accomplished by several methods. Some cross-members have a removable
center extension that can be removed and re-fabricated. Some extensions are welded in
and have to be cut out and re-fabricated. Another method commonly used is to cut the
center section out of the cross-member and weld end plates with bolt holes on each end,
then fabricate a removable center section. This way the motor does not have to be pulled
to install or remove the transmission. Some have also cut out the complete cross-
member and made a frame to frame bolt-in crossmember . On some of the Corvettes, a
pulley for the emergency brake cable needs to be relocated. When relocating the
transmission mount, check the driveline angle in the car . If the mount is too high, the
transmission will hit the car floor pan, and it will change the drive shaft angle, which could
cause a vibration.
Some Muncie and T-10 transmissions have a 10 spline input and 27 spline output. Some
have a 26 spline input and 32 spline output. The 5-speed has a 32 spline output, so the
drive shaft yoke may need to be changed. For a Corvette, the yoke has to be open end.
The 5-speed uses the same bell-housing, flywheel, pilot bearing, throw-out bearing and
pressure plate as the T-10 or Muncie.
The 5-speed can be supplied with a 10 or 26 spline input. If using a high torque motor or
going to change the clutch anyway, use the 26 spline clutch, because the 26 fine splines
are not cut as deep into the shaft as the 10 splines, which makes the 26 spline input 40
percent stronger.
T-10 or Muncie rubber transmission mount and speedometer parts may be reused or new
parts are available from Chevrolet.
Two shifters are available: Hurst 407-0009 or Long HN1001. The shifter will fit the
console with no modification to the console.
INSTALLING THE RICHMOND
STREET & ROAD RACE 5-SPEED
1963 TO 1982 CORVETTE WITH T-10 OR MUNCIE
WINNERS RUN RICHMOND
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