The manual transmissions used in the 1963-81 Corvettes are the Muncie 3-speed, Saginaw 3-speed, Muncie 4-speed, and the Warner 4-speed. Identification is determined by the side cover design and linkage. The 3-speed Muncie side cover has two bolts on the side cover top edge and the Saginaw 3-speed has one. The Muncie and Warner 4-speeds have the reverse fork mounted in the tailshaft. These two may be differentiated by the shape of the side cover; the Warner has a nine bolt curved bottom and the Muncie a seven bolt straight bottom.
No manual transmission was available in 1982.
REMOVAL & INSTALLATION
1963-65 Muncie Three-Speed and 1963 Borg-Warner T-10, Four-Speed Transmissions
See Figures 1 and 2
- Jack the car high enough to provide working clearance.
- Disconnect the speedometer cable from the transmission. Support with jackstands.
- Disconnect the shift linkage from the shift rods on the transmission. Remove the shift lever assembly and linkage.
- Remove the driveshaft as described later in this section.
- Support the engine at the rear of the oil pan with a jack.
- Remove the left and right exhaust pipes.
- Remove the transmission tailshaft-to-crossmember attaching bracket.
- Remove the two top transmission-to-bell housing bolts and replace them with two guide pins; these may be fabricated from studs. This will prevent damaging the clutch disc.
- Remove the bottom two bolts and slide the transmission straight back on the guide pin until the input shaft is clear of the clutch splines.
- Move the transmission back to clear the bell housing. Tilt the forward end of the transmission down and withdraw from the car.
- Insert a guide pin in the upper right bell housing bolt hole.
- Raise the transmission and support it on the guide pin.
- Rotate the transmission and engage the input shaft with the clutch disc. Slide the transmission forward until it bottoms against the clutch housing.
- Install the two bottom transmission-to-bell housing bolts. Remove the guide pin, and install the top two bolts. Torque all four bolts to 40-50 ft. lbs.
- Position the tailshaft mount-to-frame crossmember bracket and install the bolts hand-tight. Install the bracket-to-extension mount bolts.
- Tighten the support bracket-to-frame retaining bolts. Remove the jack from under the oil pan and tighten the bracket-to-extension mount bolts.
- Install the driveshaft.
- Install the speedometer cable to the transmission.
- Install the shift lever assembly onto the transmission and connect the shift linkage.
- Refill the transmission with lubricant. Check and adjust the shift pattern, if necessary.
1963-81 Four-Speed and 1966-69 Three-Speed Transmissions
- Disconnect the negative cable from the battery.
- Disassemble the shift lever. Unscrew the ball from the lever, lift out the "T" handle return spring and "T" handle, and remove the anti-rattle bushings. On 1968 and later cars, remove the console trim plate.
- Jack the car high enough to provide working clearance. Support with jackstands.
- Remove the driveshaft as described in the driveshaft section of Chapter 7.
- Remove the exhaust pipe heat deflectors and remove the left and right exhaust pipes. On a large block engine it is necessary to remove the forward stud on each manifold.
- Remove the two rear-mount, cushion-to-bracket attaching bolts. Support the rear of the oil pan with a jack to take off the load from the rear mount cushion.
- Remove the three transmission mount bracket-to-crossmember bolts and remove the bracket.
- Remove the two mount pad-to-transmission bolts and remove the rubber mount cushion and the exhaust pipe.
- Disconnect the shift linkage by removing the shift levers at the transmission side cover.
- Disconnect the speedometer cable at the tailshaft. Disconnect the TCS switch wiring, on cars so equipped.
- Remove the two shift lever-and-bracket bolts; lower and remove the assembly.
- Remove the four transmission-to-bell housing bolts and lower left extension bolt on later models.
- Pull the transmission rearward until it clears the bell housing. Turn the transmission to the left while pulling to the rear.
- Slowly lower the rear of the engine until the tachometer drive cable on the distributor just clears the horizontal ledge across the front of the firewall.
- Slide the transmission rearward out from the clutch. Lower the front end of the transmission and remove it from the car.
- Perform the above steps in reverse order to install the transmission.