GM Corvette 1963-1982 Repair Guide

Identification

Imprimir

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

Click image to see an enlarged view

Fig. Fig. 1: Exploded view of a 4-speed manual transmission-1974-81 Borg-Warner shown



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Fig. Fig. 2: Component key list for a 4-speed manual transmission-1974-81 Borg Warner shown

  1. Jack the car high enough to provide working clearance.
  2.  
  3. Disconnect the speedometer cable from the transmission. Support with jackstands.
  4.  
  5. Disconnect the shift linkage from the shift rods on the transmission. Remove the shift lever assembly and linkage.
  6.  
  7. Remove the driveshaft as described later in this section.
  8.  
  9. Support the engine at the rear of the oil pan with a jack.
  10.  
  11. Remove the left and right exhaust pipes.
  12.  
  13. Remove the transmission tailshaft-to-crossmember attaching bracket.
  14.  
  15. 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.
  16.  
  17. 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.
  18.  
  19. Move the transmission back to clear the bell housing. Tilt the forward end of the transmission down and withdraw from the car.
  20.  

To install:
  1. Insert a guide pin in the upper right bell housing bolt hole.
  2.  
  3. Raise the transmission and support it on the guide pin.
  4.  
  5. Rotate the transmission and engage the input shaft with the clutch disc. Slide the transmission forward until it bottoms against the clutch housing.
  6.  
  7. 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.
  8.  
  9. Position the tailshaft mount-to-frame crossmember bracket and install the bolts hand-tight. Install the bracket-to-extension mount bolts.
  10.  
  11. Tighten the support bracket-to-frame retaining bolts. Remove the jack from under the oil pan and tighten the bracket-to-extension mount bolts.
  12.  
  13. Install the driveshaft.
  14.  
  15. Install the speedometer cable to the transmission.
  16.  
  17. Install the shift lever assembly onto the transmission and connect the shift linkage.
  18.  
  19. Refill the transmission with lubricant. Check and adjust the shift pattern, if necessary.
  20.  

1963-81 Four-Speed and 1966-69 Three-Speed Transmissions

  1. Disconnect the negative cable from the battery.
  2.  
  3. 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.
  4.  
  5. Jack the car high enough to provide working clearance. Support with jackstands.
  6.  
  7. Remove the driveshaft as described in the driveshaft section of Chapter 7.
  8.  
  9. 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.
  10.  
  11. 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.
  12.  


CAUTION
Place a board between the oil pan and jack to prevent damage.

  1. Remove the three transmission mount bracket-to-crossmember bolts and remove the bracket.
  2.  
  3. Remove the two mount pad-to-transmission bolts and remove the rubber mount cushion and the exhaust pipe.
  4.  
  5. Disconnect the shift linkage by removing the shift levers at the transmission side cover.
  6.  
  7. Disconnect the speedometer cable at the tailshaft. Disconnect the TCS switch wiring, on cars so equipped.
  8.  
  9. Remove the two shift lever-and-bracket bolts; lower and remove the assembly.
  10.  
  11. Remove the four transmission-to-bell housing bolts and lower left extension bolt on later models.
  12.  
  13. Pull the transmission rearward until it clears the bell housing. Turn the transmission to the left while pulling to the rear.
  14.  
  15. 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.
  16.  


CAUTION
The tachometer cable can be easily damaged.

  1. Slide the transmission rearward out from the clutch. Lower the front end of the transmission and remove it from the car.
  2.  
  3. Perform the above steps in reverse order to install the transmission.
  4.  

 
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