Transmission does not upshift out of first, speedometer reads zero at all times Speed Sensor (VSS) failure.Ĭross member must come out to access Speed Sensor (VSS). Easy fix in the pan.ġ-2 shift is delayed and harsh, may not shift into Over Drive CheckThrottlePosition Sensor (TPS).for smooth and linear electrical response over the entire range of motion. Also, if the accumulator housing walls are scored, the housing must be replaced. Check the yellow spring inside the accum housing for breakage.
4L60E SERVO ASSEMBLY SYMPTOMS CRACKED
Try replacing the ThrottlePosition Sensor ThrottlePosition Sensor (TPS).ġ-2 Shift shudder at WOT delayed or abnormal 1-2 shift There's a problem only on the 1-2 shift 1-2 accumulator piston cracked or stuck cocked in the bore. Worst case poor line pressure rise (see below).
Doublecheck by using the pressure gauge and watch for a big drop when the PCM commands 2nd gear. It is possible to remedy a fluid problem by removing the checkball from its cage in the case in the rear of the Transmission may help (must remove valvebody), or adding a high-viscosity additive such as Lucas Transmissionmission additive or other seal restorer product.ġ-2 shift does not happen at WOT until you let off the gas Middle case leak in the 2nd gear apply circuit (servo assembly or 1-2 accumulator). Slow, slipping or no reverse “lo-reverse” clutches are worn out, fluid leak in the reverse apply circuit, or broken sunshell.
Common failures on 4L60E, problems any possible repair
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