Front Axel Specifications & Tools (4WD)
Applies to our truck’s front axle assembly (4A30 DOHC turbo, 4WD, 3A/T).
Specifications
| Item | Limit | Replace |
|---|---|---|
| Front Axel Backlash | 0.0 mm (as printed) | 5 mm (as printed) |
| Front Hub Run Out Limit | 0.05 mm (0.002 in) | Over |
| 4WD Solenoid Valve Ω Reading Limit | 36–46 Ω | Over–Under |
| Hub Castle Nut Torque Nm {kgf·cm} | 1.6 {16} (as printed on p.197) | — |
| Final Drive Gear Backlash | 0.10–0.15 mm (0.004–0.006 in) |
(verified against scan p.197, 2026-08-30) — the printed table has three columns (Item / Limit / Replace), transcribed above exactly as legible in the scan. Two caveats survive the re-check:
- Front Axel Backlash prints as Limit “0.0mm” / Replace “5mm”. That reads oddly (possibly “0.05 mm” split across the two columns by the printed layout); the digits themselves are legible but the intended spec is ambiguous on the printed page itself — treat with care.
- Hub Castle Nut Torque prints on p.197 as 1.6 Nm {16 kgf·cm} — the row heading’s units are “Nm {kgfcm}”, so the value is self-consistent, but it plainly conflicts with the 196–255 Nm (20.0–26.0 kgf·m) castle nut tightening torque printed repeatedly in Hub & Knuckle Overhaul (printed p.202/203/205/206/207). The p.197 figure is most plausibly a bearing rotation/preload check rather than the tightening torque, but the printed page labels it “Hub Castle Nut Torque”; use the 196–255 Nm procedure value for tightening.
Lubrication
| Drive Component | Oil Requirement | Capacity |
|---|---|---|
| Front Differential | SAE90W Gear Oil | 0.8 Liters (0.85 US qt) |
| Free Wheel Clutch (POSI) | SAE90W Gear Oil | 0.05 Liters (0.05 US qt) |
| CV Joint, BJ, DOJ Joint | Bearing Grease | As Required |
Special tools
| Tool Part # | Description |
|---|---|
| MB991618 | Stud Press |
| MB991115 | Differential Gear Oil Seal Installer |
| MB990767 | Hub Placement Holder |
| MB990635 | Linkage Press |
| MB990241 | Axel Shaft Puller |
| MB991354 | Puller Plate |
| MB991056 | Knuckle Arm Bridge Adapter Plate |
| MB991017 | Front Hub Reamer & Installer |
| MB990998 | Spacer |
| MB990810 | Gear Puller |
| MB991045 / MB991050 | Wheel Bearing Adapters (set) |
| MB990925 | Bearing & Seal Installer Kit |
| MB990673 | Bearing Remover |
| MB990663 | Bearing Installer |
| MB990850 | End Yoke Holder |
| MB990560 | ”Rear Axel Bearing Remover” (as printed) |
| MB990392 | Pinion Height Gage |
| MB990727 | Oil Seal Installer |
| MB991015 | Knuckle Oil Seal Installer |
| MB991318 | Lower Arm Bushing Installer |
Confirmed: MB990560 (“Rear Axel Bearing Remover”) is a shared tool — the same description is printed cleanly again under Rear Axel Data & Tools, printed p.229-231, which reproduces this entire tool table verbatim for the rear section. Not an OCR error; the manual repeats the shared special-tool set for both front and rear sections.
