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.
Transfer Reduction Driven Gear: Adjustment
- Measure depth "A" from the ST upper face to the ball bearing catch surface.
ST 398643600 GAUGE
- Measure height "B" from the ST to the end of the ball bearing outer ring.
ST 398643600 GAUGE
- Obtain the thickness of shim using the following formula to select none to two shims.
T mm = (A - 15) - (B + 15) - (0.05 - 0.25)
[T in = (A - 0.591) - (B + 0.591) - (0.002 - 0.01)]
T: Shim thickness
A: Depth from the ST upper face to the ball bearing catch surface
B: Height from the ST to the end of the ball bearing outer ring
15 mm (0.591 in): Thickness of ST
0.05 - 0.25 mm (0.002 - 0.01 in): Clearance
| Shim | |
|---|---|
| Part No. | Thickness mm (in) |
| 31288AA190 | 0.2 (0.008) |
| 31288AA200 | 0.3 (0.012) |
| 31288AA210 | 0.5 (0.02) |
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.