Component Tests and General Diagnostics
Transmissions installed in vehicles produced before May 1984 are subject to refinements currently used in production. Transmissions needing repair should be inspected and repaired as necessary according to following procedures with parts required according to transmission date of manufacture (see transmission housing code).EXTERNAL MODIFICATIONS
Selector Shaft, Modifications
- Selector shaft
^ Replace complete shaft with new version.
- Selector shaft cover
^ Provided with shoulder for spring to maintain proper position when assembling. Replace cover and 0-ring.
NOTE:
- External modifications can be performed with transmission installed.
- Only latest version parts will be supplied as spare parts.
INTERNAL MODIFICATIONS
Shift Forks/Synchronizers, Modifications
- Shift forks/rails
^ 1st/2nd and 3rd/4th gear shift forks/rails are riveted and welded to maintain proper alignment to each other.
- Synchronizers
^ 1st/2nd and 3rd/4th gear synchronizers have been changed to prevent jumping out of gear (changes cannot be detected visually).
Reverse Shift Fork/rail, Modifications
- Mating surfaces of fork/rail have splines to properly align to each other.
- Reverse shift rail is lengthened and has two bearing shells which ride in 3rd bearing which is housed in boss provided in gear carrier cover.
Reverse Gear/shaft, Modifications
- Diameter of reverse gear shaft bearing pin (A) increased from 12 to 18 mm.
- Bearing carrier hole increased to fit.
- Thickness of support plate (B) increased from 5 to 6 mm and thrust washer between plate and reverse gear is deleted.
- Reverse gear provided with shoulder.
- Replace with all new version parts only if reverse shaft pin (A) is loose in bearing carrier.
NOTE: Thrust washer between support plate and reverse gear must be removed if new version reverse shaft is installed.
Parts Requirements (Based On Transmission Date Of Manufacture)
NOTE: Previous version parts are not available and must be replaced by latest version.
CAUTION: Part numbers are for reference only. Always consult your Parts Department for latest parts information.