Eldorado V8-350 5.7L DSL (1984)
Transmission Cooler: All Technical Service Bulletins
A/T - High Pitched Whine Noise In All Gear Ranges
Bulletin No. T
84-61
File In Group 7
Number
98
Date
Apr. '84
SUBJECT:
HIGH PITCHED WHINE NOISE IN PARK, NEUTRAL AND ALL GEAR RANGES
MODELS AFFECTED: 1984 ELDORADO AND SEVILLE
1984 Cadillacs equipped with a THM 325-4L transmission and HT4100 engine may experience a high pitched whining noise noticeable in all shifter
positions, including Park and Neutral. This condition can be caused by interference between the transmission pump drive gear and body crescent.
When servicing vehicles experiencing this condition, refer to the following service procedure.
Service Procedure
1.
Identify the transmission model and serial number. The I.D. tag is located on the left side of the case bell housing. Noisy pumps should be
confined to the following 1984 model and serial numbers:
MODEL
SERIAL NUMBER
AE
2172 to 2296
AJ
31694 to 34426
2.
If the transmission is in the range listed above, replace the pump and gear assembly (P/N 8635022) and flush the cooler tank arid lines following
procedures outlined in Sections 7A and 325-4L of the Service Information Manual.
For warranty purposes, use labor Operation No. T6090 at 5.1 hours.
