A/T - Diagnosis Shift Speed/Pressure Chart
89Pontiac23Bulletin Number: 90-7-6
Reference Number: 977145
Publish Date: 10/89
Subject: MANUAL UPDATE-SECTION 7A HM4L60/700-R4 A/T DIAGNOSIS - SHIFT SPEED/PRESSURE CHART
Models
Affected: 1990 FIREBIRD 4L60 (700R4)
BULLETIN COVERS:
New Product Information for 1990 HYDRA-MATIC 4L60 transmissions. This information has been updated since publication of the 1990 Service Manual and should be noted accordingly. Be certain to familiarize yourself with these updates to properly diagnose the 1990 HYDRA-MATIC 4L60 transmission.
Figure 1:
Figure 2:
DATE OF PRODUCTION CHANGE:
Beginning with Start of Production 1990, HYDRA-MATIC 4L60 transmissions were built with the product changes explained in this bulletin.
SERVICE MANUAL REFERENCE: (Figures 1 and 2)
Figures 1 and 2 update the charts located in the Transmission Diagnosis section of the 1990 Service Manuals.