EXPERTEC TSB (86-B-89)

WARNING: This page is about the Forward Control 4.8 T, Automatic, 400/M40, which is a different variant/trim than selected.

Publication date: 1986-05-09
Reference number: 86-B-89

EXPERTEC TSB

TECHNICAL SERVICE BULLETIN

Reference Number(s): 86-B-89, Date of Issue: 05/09/86

FRONT PUMP TO CASE OIL LEAK - NEW BOLT AND O-RING P/N

Model(s): 1982-86 Light Duty Models With THM 700-R4 Automatic Transmissions

Bulletin No.: GMC 86-B-89

Date: 05/09/1986

BULLETIN ILLUSTRATION LIST

Fig 1: Graphic

Fig 2: Graphic

SERVICE INFORMATION

All 1986 THM 700-R4 transmissions, beginning April 29, 1986, or Julian Date 119 (Refer to Fig 1 ), are built using a new pump to case bolt and o-ring assembly. The new bolt and o-ring assembly improves sealing and bolt torque retention.

If a leak or low bolt torque retention condition is experienced the new pump to case bolt and o-ring (Refer to Fig 2 ) can be ordered for service as an assembly, P/N 8654343. The o-ring can be ordered separately using P/N 8654341. Refer to the appropriate Service Manual for bolt torque specifications, which will remain the same.