Automatic Transmission Specifications
Applies directly to our truck. Our 4A30 is the Turbocharged variant, so use the Turbo column/row throughout this page (bolded below), not Non-Turbo.
Specifications
| Item | Specification/Limit |
|---|---|
| Axle Speed Sensor | 100-3000 (unit not stated in source — verify) |
| Shift Control Solenoid Coil No.1 & No.2 | 11-15 Ω |
| Shift Control Solenoid Coil No.3 (T/C, Turbocharged) | 11-15 Ω (verify — see note) |
| Converter Stall Speed RPM — Non-Turbo | 2700-3300 RPM |
| Converter Stall Speed RPM — Turbocharged (our truck) | 3500-4100 RPM |
| Shift Time Lag, “N”→“D” Range (between shifts) | Below 0.7 sec |
| Shift Time Lag, “N”→“R” Range (between shifts) | Below 1.2 sec |
| Fluid Oil Pressure, “D” Range, Idle & Stall — Non-Turbo | 520-667 kPa (5.3-6.8 kgf/cm²; 75-97 psi) |
| Fluid Oil Pressure, “D” Range, Idle & Stall — Turbo (our truck) | 735 kPa (7.5 kgf/cm²; 107 psi) |
| Fluid Oil Pressure, “R” Range, Idle & Stall — Non-Turbo | 1216-1540 kPa (12.4-15.7 kgf/cm²; 176-223 psi) |
| Fluid Oil Pressure, “R” Range, Idle & Stall — Turbo (our truck) | 1559 kPa (15.9 kgf/cm²; 226 psi) |
| Detent Plate & Detent Pin Gap, “N” Position | 0.1-0.9mm (0.004-0.035 in) |
(verify printed p.176) — two flagged items:
- Axle Speed Sensor limit shown as “100-3000” with no unit given in the OCR text (likely Ω, but not confirmed). This same figure recurs identically in A/T Dealer Level Testing, so the number itself is consistent across the source, but the missing unit is not.
- Shift Control Solenoid Coil No.3 was transcribed as “11-1502”, which does not parse as a clean ohm range. It most likely reads 11-15 Ω (matching the No.1/No.2 spec directly above it), but this is a reconstruction, not a confirmed reading — do not rely on it without checking the printed page.
Specialty tools
| Part # | Description |
|---|---|
| MB991536 | TPS Harness Adapter |
| MD998330 | Oil Pressure Gauge |
| MD998332 | Oil Pressure Gauge — Transmission Adapter |
(verify printed p.176) — the MD998332 description was OCR’d as two stacked lines (“Oil Pressure Gage” / “Transmission Adapter”). It’s presented above as one combined description consistent with how both part numbers are referenced together in A/T Dealer Level Testing (“Attach MD998330 & MD998332 Oil Pressure Adapters”), but it is possible these are two distinct tool line items with a missing part number for one of them. Not confirmed.
