Chevette L4-98 1.6L (1982)
Band: Customer Interest
A/T - Delayed Engagement in First Gear
Number:
83-T-71
Section:
VIIC
Date:
August, 1983
Subject:
DELAYED ENGAGEMENT 1982-1983 THM 180-C
FIGURE 1 - FIRST GEAR
TO:
ALL CHEVROLET DEALERS
Some 1982 and 1983 THM 180-C transmissions may experience delayed engagement in first gear. This condition may be the governor hub
seal rings seized in their grooves (Figure #1). When servicing any 1982 or 1983 THM 180-C transmission with a delayed engagement
condition, refer to the service procedure below:
SERVICE PROCEDURE:
1.
Check engine vacuum using a vacuum gage to insure there is sufficient vacuum to the transmission. Refer to your service manual for specifications
and correct as required.
2.
Check the modulator to insure that it is the correct part number. Refer to the parts manual for specific part numbers.
3.
Check for freeness of the governor hub seal rings. The rings should rotate freely in the grooves. If not, remove the rings, clean the grooves with
cleaning solvent, and inspect the governor hub ring grooves for nicks or burrs. Remove all burrs, if any are present. Replace the governor hub and
governor hub seal rings if necessary. Refer to your parts manual for specific part numbers.
4.
Check the band adjustment per specifications outlined in your service manual.
5.
Check the third speed clutch input sprag for wear. If the sprag is worn, refer to your parts manual and replace it.
