K 1500 Truck 4WD V8-393 6.5L DSL VIN P (1995)
Torque Converter Clutch Solenoid: Technical Service Bulletins
A/T - 2-4 Band, TCC Solenoid, 3-4 Clutch Friction/Plates
File In Section: 7 - Transmission
Bulletin No.: 47-71-41
Date: January, 1995
Subject:
New 2-4 Band Assembly, 3-4 Clutch Friction and Steel Plates and Torque Clutch PWM Solenoid
Models:
1995
Buick Roadmaster
1995
Cadillac Fleetwood
1995
Chevrolet Camaro, Caprice, Corvette
1995
Pontiac Firebird
1995
Chevrolet and GMC Truck C/K Models and M/L, G Vans
1994-95
Chevrolet and GMC Truck S/T Models
1994
Oldsmobile Bravada
(1994 Models with RPO +CTF Package)
Transmission Applications: 1995 Hydra-Matic 4L60-E (RPO M30)
A new 2-4 Band Assembly was introduced at the start of production for the 1995 Model Year and 1994 Bravadas and S/T trucks. The 2-4 Band friction
material has changed appearance from a brown material to a gray/black material. This change was made to enhance durability.
When servicing a 1995 Hydra-Matic 4L60-E transmission, do NOT assume that the 2-4 Band is burned/damaged due to its dark color. This dark color is
normal. Before replacing the 2-4 Band inspect it for scoring, chunking or heavily worn friction material.
Before Replacing the Reverse Input Housing and Drum Assembly inspect for scoring or signs of excessive heat. The 2-4 Band and/or Reverse Input
Housing and Drum Assembly should be replaced ONLY if the above listed damage is found.
Note:
The new 2-4 Band Assembly will NOT service past model Hydra-Matic 4L60-E or 4L60 transmissions.
A new 3-4 clutch friction plate was introduced at the start of production for the 1995 Model Year and 1994 Bravadas and S/T Trucks. The 3-4 clutch
plate friction material has changed appearance from a brown material to a green/black material. This change was made to enhance durability.
When servicing a 1995 Hydra-Matic 4L60-E transmission, do NOT assume that the 3-4 clutch friction plates are burned/damaged due to their dark color.
This dark color is normal. Before replacing the 3-4 clutch friction plates inspect for scoring, chunking or heavily worn friction material.
Before replacing the 3-4 clutch steel plates inspect for scoring or signs of excessive heat. The 3-4 clutch friction plates and/or 3-4 clutch steel plates
should be replaced ONLY if the above listed damage is found.
Note:
The new 3-4 friction plates will NOT service past model Hydra-Matic 4L60-E or 4L60 transmissions.
A new Torque Converter Clutch PWM Solenoid was introduced at the start of production for the 1995 Model Year and 1994 Bravadas and S/T trucks.
The new torque converter clutch PWM solenoid is used to control fluid acting on the converter clutch valve, which then controls TCC apply and release.
The solenoid is attached to the control valve body assembly within the transmission. The TCC PWM solenoid is used to provide smooth engagement of
the torque converter by operating on a negative duty cycle percent of "ON" time.
It a fault is detected in the TCC PWM circuit, DTC 83 will set.
