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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 159 (Automatic Transaxle - 4T65-E - Service, Diagnosis & Troubleshooting) >> Troubleshooting >> Fourth Gear Only

Fourth Gear Only

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Fourth Gear Only

Checks Cause
DEFINITION: The transmission only provides fourth gear in Drive range. The vehicle accelerates from a stop in fourth gear and does not upshift. Fourth gear ratio is 0.705:1.
Control Valve Body Assembly Debris is found in the control valve body (301) or the control valve body spacer plate and gasket assembly (396)
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