Bonneville V6-231 3.8L VIN 3 SFI (1988)
Transmission Temperature Sensor/Switch: Technical Service Bulletins
A/T - 4T60 New Thermo Element/Setting Procedure
Bulletin Number:
91-7-23
Reference Number:
077152
Publish Date:
12/90
Subject:
NEW THERMO ELEMENT AND PIN HEIGHT SETTING PROCEDURE
Models
Affected:
1984-1991 6000, BONNEVILLE AND GRAND PRIX MODELS W/4T60 AND 4T60-E TRANSAXLES
Figure 1 - Thermo Element
Figure 2 - Thermo Element Installation
BULLETIN COVERS: (Figure 1)
A new thermo element that contains an additional open slot (instead of a hole) so the element can be installed after setting the height of both pins.
Installing the thermo element after setting the height of both pins could help reduce the potential of damage, which can change the cold-to-hot fluid level
calibration during the installation. This will help prevent durability concerns associated with incorrect fluid levels. The new thermo element can be used
on all previous model HYDRA-MATIC 4T60 and HYDRA-MATIC 4T60-E transaxles.
IMPORTANT:
When reading the fluid level indicator, check both sides to ensure the reading is accurate and not a false reading caused by the rotating parts splashing
fluid onto the indicator. A false reading could show a very low reading on the indicator when, in fact, the true fluid level is below the end of the
indicator.
