Firebird V6-173 2.8L VIN L 2-bbl HP (1983)
Torque Converter: All Technical Service Bulletins
A/T - Whine Noise In First, Second and Reverse
Number
83-T-42
Section 7 Date 07/83
Subject:
WHINE NOISE IN FIRST, SECOND AND REVERSE - 1983 THM 200C AND 200-4R
Some 1983 THM 200C and 200-4R transmissions may experience a noise condition that sounds like a high pitched whine. This noise condition may be
coming from the front internal gear assembly and should not be confused with a torque converter bearing noise or a pump cavitation noise.
In diagnosing this condition, if the noise is noticeable in drive with the brake applied and the engine at approximatley 1500 rpm, the cause could be a
torque converter bearing noise or an oil pump cavitation noise. If the whine noise is noticeable when driving the car in first, second and reverse only, the
cause could be the front internal gear.
When servicing any 1983 THM 200C or 200-4R transmission for this whine noise condition and the cause has been diagnosed to be the front internal
gear, replace it with part number 8630909.
