A/T - Revised Pressure Specs/Control Valve Exploded View
Bulletin Number: 92-7-23Reference Number: 377102
Publish Date: 2/93
Subject:
SERVICE MANUAL UPDATE - SECTION 7 TRANSMISSION UNIT REPAIR INFORMATION
Models Affected:
1992 FIREBIRD MODELS W/4L60
TRANSMISSION APPLICATIONS:
1992 HYDRA-MATIC 4L60 (MD8)
BULLETIN COVERS:
New Product Information for 1992 HYDRA-MATIC 4L60 transmissions. This information has been updated since publication of the 1992 Service Manual and should be noted accordingly. Be certain to familiarize yourself with these updates to properly repair the 1992 HYDRA-MATIC 4L60 transmission.
DATE OF PRODUCTION CHANGE:
On August 14, 1991 (Julian Date 226), the HYDRA-MATIC 4L60 transmissions were built with a new calibration that changed the TV limit line-up. The changes included a new TV limit valve (Ill. 332), a new TV limit valve spring (Ill. 331), and eliminates the TV limit plug (Ill. 351). Also included is an updated line pressure check chart and an updated 2nd apply piston and housing application chart.
SERVICE MANUAL REFERENCE:
Update your 1992 Service Manual Section 7 Transmission with the information.
Line Pressure Check Procedure
Control Valve Assembly - Exploded View
Piston and Housing Measurement and Servo Assembly