Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2004 Isuzu Ascender 2WD L6-4.2LFACTORY OEM SERVICE PROCEDURE
Reaction Gear Set Removal
Reaction Gear Set Removal
Important: The retainer must be replaced.
1. Use snap ring pliers remove the output shaft to input carrier retainer (661).
Important: The carrier assembly can be a 4 or 5 pinion design depending on model.
2. Remove the input carrier assembly (662) and remove the bearing assembly (663).
3. Remove the input internal gear (664) and the reaction carrier shaft assembly (666).
4. Remove the thrust washer (669a or 669b) and the reaction sun shell (670).
Important: The retainer must be replaced.
1. Use snap ring pliers remove the output shaft to input carrier retainer (661).
Important: The carrier assembly can be a 4 or 5 pinion design depending on model.
2. Remove the input carrier assembly (662) and remove the bearing assembly (663).
3. Remove the input internal gear (664) and the reaction carrier shaft assembly (666).
4. Remove the thrust washer (669a or 669b) and the reaction sun shell (670).
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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