LeSabre V6-181 3.0L (1986)
Torque Converter Clutch: All Technical Service Bulletins
A/T - TCC Busyness Caused By Early 3-4 Shift
Bulletin:
86-7440-8A
Date:
Feb. '88
Ref. No.: 86-215A-7440
Corp. Ref. No.: 677135R
SUBJECT:
TORQUE CONVERTER CLUTCH (TCC) BUSINESS CAUSED BY EARLY 3-4 SHIFT
MODELS AFFECTED: 1986 LESABRES AND ELECTRAS EQUIPPED WITH 3.0L AND 3.8L V-6 ENGINES AND THM 440-T4 (ME9)
MODELS 6BAH, 6BBH, 6BDH, 6BHH, 6BLH, 6BMH
NOTICE:
This bulletin is revised to include 6BHH model transaxle which was omitted in the original 86-7440-8 bulletin. Bulletin 86-7440-8 should
be discarded.
BULLETIN COVERS
Torque converter clutch (TCC) busyness caused by an early 3-4 shift in 1986 "C" and "H" cars equipped with a 3.0L and 3.8L engine and THM 440-T4
transaxle, may be repaired by replacing the 3-4 throttle valve (TV) spring. Under light throttle, TCC releases during the shift raising engine rpm
momentarily (may be diagnosed as an engine flare), then TCC reapplies shortly after the shift is completed.
DATE OF PRODUCTION
Start of Production for all 1987 THM 440-T4 transaxles.
