Product Description
ONLY SOME 2005-UP UNITS WERE EQUIPPED WITH A CONTROL SPRING IN THE B5 CLUTCH CONTROL VALVE LINEUP
455-50SN 55-51SN RE5F22A B5 Control Spring
No tooling required
Only some Aisin AW 55-50SN and 55-51SN transmissions ('05-later units installed in Nissan and GM vehicles) were equipped with a control spring in the B5 clutch control valve line-up. Using a valve body without a spring in those vehicles creates a mismatch between the B5 lineup and the TCM calibration, often causing a harsh 2-3 upshift or 3-2 downshift. Sonnax B5 control spring 59947-33 is a direct replacement for the OE spring. This allows rebuilders to rebuild any suitable core for use in vehicles where the spring is required, or correct shift concerns caused by a missing spring.
- Restores valve train response, matching the TCM calibration
- Allows any AW55-50SN valve body to be converted to a spring type application
Symptoms
- Incorrect valve body calibration
- Missing B5 control spring
- 2-3 Harsh
- 3-2 Harsh
- 2-3 Flare
- 3-2 Flare
Cause
TCM programing anticipates spring control response in the B5 control line-up in certain vehicles. Without this spring, the calibration is mismatched and 2-3/3-2 shift issues may occur.
Correction
The Sonnax B5 control spring is a direct replacement for the OE spring and it can be added to any valve body in order to match the TCM calibration.
Contents
- Spring (5)
