Diesel Data: Automotive Repair

Late Shift After Shifting From N To R, Or Excessive Shock When Shifted Into R




Late shift after shifting from N to R, or excessive shock when shifted into R

Shift solenoid valve D defective

A/T clutch pressure control solenoid valve A defective

Shift cable broken or out of adjustment

Connection between shift cable and transmission or body is worn

Input shaft (mainshaft) speed sensor defective

Output shaft (countershaft) speed sensor defective

ATF temperature sensor defective

Shift fork shaft stuck

Foreign material in separator plate orifice

Shift valve D defective

5th/reverse accumulator defective

Lock-up shift valve defective

5th clutch defective

Notes

Check for a stored DTC, and check for loose connections.

Notes

Test the solenoid valve function with the HDS.

Notes

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

Notes

Inspect the shift solenoid valve O-rings, and check for shift solenoid valve for seizure.

Notes

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

Notes

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

Notes

Inspect the sensor O-ring for wear and damage.

Notes

Check for a missing shift fork bolt on the shift fork shaft.

Notes

Inspect the servo valve O-ring.

Notes

Check the shift fork shaft detent for wear and damage.

Notes

Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it and clean the separator plate orifice.

Notes

Check the 5th clutch pressure.

Notes

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

Notes

Inspect the 5th accumulator piston, O-ring, and spring for wear and damage in the servo body.

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 mainshaft and 5th clutch for wear and damage.

Notes

Inspect the clutch piston, clutch piston check valve, and 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 plates for wear and damage, and inspect the clutch wave-plate height. If the discs and plates are worn or damaged, replace them as a set. If the wave-plate height is out of tolerance, replace the wave-plate. If they are OK, adjust the clearance with the clutch end-plate.