A/T - Revised Serviceability of 1-2/2-3 Shift Solenoids

File In Section: 7 - Transmission

Bulletin No.: 77-71-73

Date: January, 1998

INFORMATION

Subject:
Service Availability of 1-2 and 2-3 Shift Solenoids

Models:
1993 Cadillac Allante
1993-98 Cadillac Eldorado, Seville
1994-98 Cadillac Concours
1996-98 Cadillac DeVille
1997-98 Cadillac d'Elegance
1995-98 Oldsmobile Aurora
with HYDRA-MATIC 4T80-E Transaxle (RPO MH1) and with 4.0L, 4.6L Engine (VINs C, Y, 9 - RPOs L47, LD8, L37)

This bulletin contains information regarding the service availability of the 1-2 and 2-3 shift solenoids for the 4T80-E transaxle. Updated Service Manual pages for the 1996, 1997 and 1998 4T80-E TURM Manuals are included.








Service Information (Figures 1 and 2) During the 1996 Model Year, transaxle Julian date 047, a new 1-2, 2-3 shift solenoid assembly (909) and a pressure control solenoid valve fluid filter retainer (981) were implemented on the 4T80-E transaxle. These individual components are currently available at GMSPO.

All transaxles with a Julian date prior to 1996, 047 must be serviced with a service kit - 1-2/2-3 shift solenoid valves, which is available at GMSPO. This kit, P/N 24211355, contains the 1-2, 2-3 shift solenoid valves (909), the pressure control solenoid valve filter (917), the pressure control solenoid valve fluid filter retainer (981) and the bolt (940) to hold the retainer to the lower control valve body (903). All components in this kit must be used when servicing these transaxles.

1996 transaxles with a Julian date after 047, and 1997 through 1998 transaxles, should be serviced with individual components.





Parts Information

Parts are currently available from GMSPO.

Attached are the new updated pages of the 1996, 1997 and 1998 TURM Manual, Section 7, Automatic Transaxle-4T80-E with a revised page for Lower Control Valve Body Assembly Disassemble, Lower Control Valve Body and TFP Switch Install and the component locator view of Lower Channel Plate Control Valve Body and Accumulator Housing Assembly.

Replace these pages in your 1996, 1997 and 1998 * TURM Manuals.














1996 - revised pages are:
7A-7B-27, 7A-7B-28, 7A-7B-33, 7A-7B-65

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1997 - revised pages are:
7A-7B-14, 7AJB-123 and 7A-7B-131

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1998 - revised pages are:
7-1349, 7-1358 and 7-1380

Warranty Information
For vehicles repaired under warranty, use:

Labor Code Labor Time
K6555 1-2 shift solenoid, Use published labor operation time
or K6556 2-3 shift solenoid