Diesel Data: Automotive Repair

Delayed Engagement After Shifting From N To D, Or Excessive Shock When Shifting




Delayed engagement after shifting from N to D, or excessive shock when shifting

Worn engine or transmission mounts

Shift solenoid valve E defective

A/T clutch pressure control solenoid valve A defective

A/T clutch pressure control solenoid valve B defective

A/T clutch pressure control solenoid valve C defective

Shift cable broken or out of adjustment

Connection between the shift cable and transmission or shift lever is worn

Input shaft (mainshaft) speed sensor defective

Output shaft (countershaft) speed sensor defective

ATF temperature sensor defective

Foreign material in separator plate orifice

Servo control valve defective

1st accumulator defective

1st check ball stuck

Lock-up shift valve defective

1st clutch defective

Notes

Check the engine and transmission mounts.

Notes

Test shift solenoid valve E with the HDS Shift Solenoid Valve Test, Replacement, And Shift Solenoid Wire Harness Replacement.

Notes

Inspect the O-ring, and check for a seized shift solenoid valve.

Notes

Test A/T clutch pressure control solenoid valve A with the HDS A/T Clutch Pressure Control Solenoid Valve A Test.

Notes

Test A/T clutch pressure control solenoid valves B and C with the HDS A/T Clutch Pressure Control Solenoid Valve B And C Test.

Notes

Inspect the A/T clutch pressure control solenoid valve body gasket and the ATF feed pipes for wear and damage.

Notes

Check for a loose shift cable at the shift lever and the selector control lever.

Notes

Check the input shaft (mainshaft) speed sensor and the output shaft (countershaft) speed sensor installation.

Notes

Inspect the ATF temperature sensor O-rings.

Notes

Check the 1st clutch pressure A/T Pressure Test.

Notes

Check the servo control valve in the main valve body for free movement, and check the valve spring for wear and damage.

Notes

Check the 1st accumulator piston, the O-ring, and the spring in the regulator valve body for wear and damage.

Notes

Check the lock-up shift valve in the regulator valve body for free movement, and check the valve spring for wear and damage.

Notes

Inspect the clutch piston, the clutch piston check valve, and the O-rings. Check the spring retainer for wear and damage. Inspect the clearance between the clutch end-plate and the top disc. If the clearance is out of tolerance, inspect the clutch discs and the plates for wear and damage, and inspect the clutch wave-plate height. If the discs and the flat-plates are worn or damaged, replace the discs and the flat plates as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If the discs and the plates are OK, adjust the clearance with the clutch end-plate.

Notes

Inspect the 1st clutch feed pipe. If the 1st clutch feed pipe is scored, replace the end cover.

Notes

Replace the secondary shaft if the bushing for the 1st clutch feed pipe is loose or damaged.