Caprice 2007 Gear Shift Jerk in transmission
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Caprice 2007 Gear Shift Jerk in transmission
Hello All,
Would appreciate the advice to troubleshoot the subject issue I have started facing recently.
Chevrolet (Holden) Model 2007 Engine V6
History
=====
Around a month ago, the transmission oil leaked in the engine coolant, hence the radiator was clogged and needed to be replaced. I assume by the time I became aware of it (fairly soon), the mixture of transmission oil + engine coolant was circulating in the automatic transmission as well as the engine lines.
The following repairs were taken by the mechanic
1. Bilstein engine flush
2. Gear oil drain / some drying time / refill
3. Radiator + Hose pipes replacement with new parts.
Current Problem
============
After a short while of having the above mentioned repairs, the following symptoms are appearing
1. When cold starting the car, the auto transmission behaves normal.
2. After a while of running , it starts having a noticeable jerk when moving the car from stationary/dead slow speed .
3. The jerk is noticeable in the initial gears (probably 1st or 2nd), in the upper gears the shifting is smooth.
4. Sometimes at random frequency there are slight uneven judder in drive (similar to what can be felt if there is a plug missing/misfire) - but could be related to transmission as well.
Error Codes
==========
I am able to collect the following error codes from the OBD II Bluetooth
P0700 (Transmission control system - MIL Request)
P0717 (Input/Turbine Speed Sensor Circuit No Signal).
Before going for a detailed (and possibly expensive) transmission dismantle or overhaul or service
1. Can anyone recommend what should be the quick remedy that can be applied as a litmus check to see if it works. Can/should I first try re-drain/fill of the transmission oil - as I have read elsewhere that such issues can come in case of low transmission oil levels.
2. If oil is not the cause then in light of the error codes, what are the narrowed focus areas where the repairmen have to start troubleshooting. I mean any idea physically where/what to look at for these error codes.
Many thanks for reading and suggesting possible way forward.
Would appreciate the advice to troubleshoot the subject issue I have started facing recently.
Chevrolet (Holden) Model 2007 Engine V6
History
=====
Around a month ago, the transmission oil leaked in the engine coolant, hence the radiator was clogged and needed to be replaced. I assume by the time I became aware of it (fairly soon), the mixture of transmission oil + engine coolant was circulating in the automatic transmission as well as the engine lines.
The following repairs were taken by the mechanic
1. Bilstein engine flush
2. Gear oil drain / some drying time / refill
3. Radiator + Hose pipes replacement with new parts.
Current Problem
============
After a short while of having the above mentioned repairs, the following symptoms are appearing
1. When cold starting the car, the auto transmission behaves normal.
2. After a while of running , it starts having a noticeable jerk when moving the car from stationary/dead slow speed .
3. The jerk is noticeable in the initial gears (probably 1st or 2nd), in the upper gears the shifting is smooth.
4. Sometimes at random frequency there are slight uneven judder in drive (similar to what can be felt if there is a plug missing/misfire) - but could be related to transmission as well.
Error Codes
==========
I am able to collect the following error codes from the OBD II Bluetooth
P0700 (Transmission control system - MIL Request)
P0717 (Input/Turbine Speed Sensor Circuit No Signal).
Before going for a detailed (and possibly expensive) transmission dismantle or overhaul or service
1. Can anyone recommend what should be the quick remedy that can be applied as a litmus check to see if it works. Can/should I first try re-drain/fill of the transmission oil - as I have read elsewhere that such issues can come in case of low transmission oil levels.
2. If oil is not the cause then in light of the error codes, what are the narrowed focus areas where the repairmen have to start troubleshooting. I mean any idea physically where/what to look at for these error codes.
Many thanks for reading and suggesting possible way forward.
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