Symptoms:

  • Soft shifts
  • Harsh downshifts

Cause:

Incorrect or soft factory calibration of linear solenoids, which can be aggravated by low line pressure.

Correction:

This special tool is designed to fit the pentagonal-shaped recesses in clutch pressure control solenoid adjuster screws, allowing them to be calibrated for firmer shifts.

Honda, Acura 4-Speed, 3-Shaft, Honda, Acura 5-Speed

Solenoid Adjustment Tool
Part No. 88950-T

Fits '96-later units

View Instructions Find a Distributor

Honda/Acura 4-speed (3-shaft) and 5-speed transmissions often exhibit soft shifts and/or low line pressure rise. These concerns can be caused by incorrect or soft factory calibration of the clutch pressure control solenoids (CPCS), and further aggravated if there is line pressure leakage within the transmission. The PCM controls shift feel and overlap through CPCS A and B in conjunction with shift control solenoid C. Adjusting CPCS A and B can result in firmer shifts and increased line rise. Sonnax has developed pentagonal-shaped solenoid adjustment tool 88950-T to fit the recesses of solenoid adjuster screws.

  • Allows proper adjustment of solenoid block
  • Transmission removal not necessary

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

Honda/Acura 4/5 Speed Valve Body Layout

Honda/Acura 4/5 Speed Valve Body Layout
  • Honda, Acura 4-Speed, 3-Shaft, Honda, Acura 5-Speed Solenoid Adjustment Tool 88950-T
  • Honda, Acura 4-Speed, 3-Shaft, Honda, Acura 5-Speed Solenoid Adjustment Tool 88950-T

I recently purchased your solenoid adjustment tool for my 1998 Honda Accord 3.0 4-speed automatic with 173,000 miles on it. It had been flaring so I adjusted the "B" – still on the car – 3/4 turn counterclockwise. The flaring is 99% gone and the shifting is much smoother. Thank you so much.

M. Steenwyk
Hudsonville, MI