Transmission:1989 THM 400/475 Trucks
TRANSMISSION: 1989 THM 400/475VEHICLE LINE USAGE: TRUCKS
This section contains New Product Information for all 1989 THM 400/475 Hydra-Matic 3L80/3L80-HD Transmissions. The information contained in this bulletin describes changes that have been implemented in the 1989 THM 400/475, Hydra-Matic 3L80/3L80-HD Transmissions. Refer to each section of this bulletin for specific product change information.
DATE OF PRODUCTION CHANGE:
Beginning with the Start of Production 1989, all 1989 THM 400/475, Hydra-Matic 3L80/3L80-HD Transmissions were built with the product changes explained in this bulletin.
FIGURE 2 - THM 400 SHIFT SPEED CHART:
SERVICE MANUAL REFERENCE:
Product changes in this bulletin are included in your 1989 THM 400/475, Hydra-Matic 3L80/3L80-HD Service Manual Sections.
SUBJECT: Shift Speed chart
SERVICE MANUAL REFERENCE: (Figure 2)
This information is an Update to your 1989 Service Manual Transmission Diagnosis Section. A new model, DNA, was released after publication date.