LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2001 >> Cavalier LS, 2.2 4 >> Repair and Diagnosis >> External Pages >> Different car >> Section 244 (Automatic Transaxle - 4T40-E/4T45-E - Introduction, Service & Replacement) >> Description and Operation >> Transmission Adaptive Functions

Transmission Adaptive Functions

WARNING: This page is about a different car, the 2004 Pontiac Sunfire and 2004 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

The 4T40-E transmission uses a line pressure control system, which has the ability to continuously adapt the system line pressure. This compensates for normal wear of the following parts:

The PCM maintains the Upshift Adapt parameters for the transmission The PCM monitors the AT ISS sensor and the AT OSS during commanded shifts in order to determine if a shift is occurring too fast or too slow. The PCM adjusts the signal from the transmission pressure control solenoid in order to maintain a set shift feel.

Transmission adapts must be set again when the transmission is overhauled or replaced. In order to set the transmission adapts again, select the following:

  1. Tech 2
  2. Special Functions
  3. Transmission Output Controls
  4. Clear TAP
scientia non olet · About LEMON Manuals