What would cause my truck to shift hard?
Hard shifting may be caused by a slow sensor or one that is transmitting the wrong signals from the engine. A faulty speed sensor may be to blame for reporting that vehicle is running more slowly or more quickly than it actually is.
What causes a 4l60e to shift hard?
The pin which the piston rides on is steel and commonly wears the pin bore into an egg shaped hole. The accumulator then leaks and causes a harsh 1-2. The purpose of the accumulator is to cushion the shift. If the accumulator is leaking there is no or reduced cushion effect giving you a harsh shift.
What causes transmission to shift hard from 1st to 2nd?
Trouble in the Vacuum Lines Transmission shifting hard from 1st to 2 nd could be as a result of an issue in the vehicle vacuum lines. When your car vacuum line is clotted, disconnected, or twisted; this could cause extra pressure to vehicle transmission which makes the gear hard to shift.
What causes a hard shift on a Silverado?
A 12 Hz electrical feedback from the charging circuit may be affecting the transmission pressure control solenoid, causing a fluctuation of the line pressure within the transmission. Throttle position is less than 15 percent. Engine coolant and transmission fluid are at full operating temperature.
Can a Chevy Silverado shift from 2nd to 3rd?
No 1st or 4th, shift 2nd to 3rd by itself when put in D or OD and locks converter: Goes into gear but sluggish like brakes are on, can manually shift to 2nd to get moving, then put in OD and truck shift 3rd as well as 4th are OK. Also, torque convertor locks up.
What causes a 1-2 shift flare on a Silverado?
Some customers may comment about a 1-2 shift flare with an end bump or a harsh 1-2 shift at light throttle. This condition may be caused by the 2-4 band apply time extending through the 1-2 accumulator stroke. 1. Verify the customer’s concern. 2. Remove the valve body. Refer to Valve Body and Pressure Switch Removal in SI.