Hesitation or Flat Spot Between 56-80 km/h (35-50 mph) (Reprogram Transmission Control Module)
| Subject: | Hesitation or Flat Spot Between 56-80 km/h (35-50 mph) (Reprogram Transmission Control Module) |
| Models: | 2008 Buick Enclave |
| 2007-2008 GMC Acadia |
| 2007-2008 Saturn OUTLOOK |
| with FWD or AWD |
Condition
Some customers may comment on a flat spot or hesitation between 56-80 km/h (35-50 mph) speed range.
Cause
The existing transmission calibration is programmed to maximize fuel economy and requires a greater throttle input than some customers would prefer to provide acceleration in this speed range.
Correction
A new calibration is available. This new calibration increases the speed required to obtain upshifts and removes TCC apply from 2nd to 3rd gear, thereby reducing engine lugging and improving vehicle response to accelerator input.
Important: This calibration will have a negative impact on fuel economy of 0-1.2 L/100 km (0-2 mpg) combined driving.
To obtain this calibration, contact Techline (TCSC) at 1-800-828-6860 (English) or 1-800-503-3222 (French). Techline will reconfigure the vehicle to make this calibration the default calibration for this vehicle.
The table below shows the Shift Pattern Change at Light Throttle.
-- | Current Calibration | New Calibration | ||
|---|---|---|---|---|
Shift | MPH | KPH | MPH | KPH |
1-2 | 8 | 13 | 12 | 19 |
2-3 | 18 | 29 | 20 | 33 |
3-4 | 24 | 40 | 31 | 50 |
4-5 | 32 | 53 | 43 | 69 |
5-6 | 44 | 71 | 56 | 90 |
TCC Applied | 2nd, 3rd, 4th, 5th, 6th | 4th, 5th, 6th | ||
Warranty Information
For vehicles repaired under warranty, use:
Labor Operation | Description | Labor Time |
|---|---|---|
K5364 | Transmission Control Module Reprogram with SPS | Use Published Labor Operation Time |
