A/T Pump Case - Oil Exhausting From Vent
Number: 83-T-9Section: VIIc
Date: Dec., 1982
Subject: OIL EXHAUSTING FROM VENT -
THM 200C AND THM 400
TO: ALL CHEVROLET DEALERS
Some THM 200C and 400 model transmissions may experience oil exhausting from the transmission oil vent. This condition may be caused by the pump to case attaching bolts bottoming in the threaded bolt holes in the case.
If any 200C or 400 THM transmissions are being serviced for this condition refer to the following service procedure.
SERVICE PROCEDURE
1. Remove the converter from the transmission.
2. Check the pump to case attaching bolts for proper torque (20.0-27.0 N-m or 15-20 ft.lbs.).
3. If the bolts are found not to be up to torque specifications, remove all six (6) of the bolts and grind 1/8 inch (3.18 mm) off the end of the bolts, leaving the ends as square as possible.
4. Replace the bolts after grinding and torque to 20.0-27.0 N-m (15-20 ft.lbs.).