Transmission Modification Procedure

1. Remove transmission valve body and store in a clean, safe place away from under body of truck. Refer to appropriate 1993 on-vehicle service manual for correct details of this procedure.





2. Hang wire harness out of way and clean case with solvent (Figure 3)





3. Thoroughly dry case with shop air (Figure 4)








4. Attach tool J4135O to case with bushing and lettering facing floor as shown in Figures 5 and 6.
5. Use bolts provided with tool and install all bolts finger tight prior to tightening to eliminate possible bolt misalignment (Figure 6)





6. Torque all bolts to 5 N-m (44 lb.in.) (Figure 7)

Notice:
If valve body bolts are used with tool they will cause damage to case due to length differences. Use bolt supplied with special tool J41350.





7. Drill out case using drill bit provided in tool kit J4l350. Apply cutting fluid to drill. The plate from tool kit J4135O has a drill guide bushing in the center. Drill bit should be placed in drill guide bushing when drilling out case. Depth of drill must go until shoulder stop of the drill bit meets the drill bushing to guarantee proper depth (Figure 8) and to open the oil channel.

Notice:
Do not drill case with valve body or other related hardware directly below.





8. Remove tool J4135O from case (Figure 9).





9. Clean case with solvent (Figure 10)





10. Thoroughly dry case with shop air (Figure 11) . Repeat if necessary.





11. Using stone provided with tool kit J41350, stone surface of case where hole has been drilled to remove any burrs. Inspect for loose burrs in hole and channel that was drilled (Figure 12)





12. Clean case with solvent (Figure 13).





13. Thoroughly dry case with shop air (Figure 14). Repeat stone cleaning procedure until transmission cavity is free of all burrs and metal debris.





14. Install new manual valve (supplied in transmission fix kit) in valve body (Figure 15).
15. Remove all filters from old spacer plate, clean them and put them on new spacer plate provided in transmission fix kit.
16. Install valve body using new valve body gaskets and new spacer plate provided in transmission fix kit (be sure filters have been installed on spacer plate). Old valve body gaskets and spacer plates are not to be reused.
17. Install new transmission oil filter and install transmission oil pan using new transmission oil pan gasket.

17a. Refill transmission with 4 quarts of automatic transmission fluid (Dextron IIE or Dextron III).

17b. Start unit and engage all gears. Recheck transmission fluid level and adjust level as required. Inspect for any fluid leaks and correct before returning unit to customer.

18. Install new PROM (MEM-CAL) as described in On-Vehicle section of service manual.
19. Install Campaign Identification Label.