WHAT CAUSES MY (135K MILES) AUTOMATIC TRANSMISSION WAS SHIFTING HARD INTO ALL GEARS AND REVERSE.
2001 Saturn SW2 • 135,000 miles
My mechanic has changed out all 4 engine mounts that were broken stating that that is what the fault codes had indicated. Now it hard shifts into reverse and my mechanic is not sure what to do from here.
February 9, 2012.
February 9, 2012.
Did all checks listed in your response all check normal. However he did not check the idling pressure with the trs LP fuse pulled he states that on this car that makes no difference. All fused are OK. He is now wanting to look into the issue being internal to the transmission. What do you recommend from here?
When you pull the trs LP fuse in park the line pressure will read full line pressure.So yes that test and pressure is important it lets you know how the line pressure actuator is responding and also how the pressure regulator is working.I wouldnt be going inside the transmisionfor hard shifting into every gear and banging into reverse.That is caused by a excessive pressure issue.Those cars are well known for bad pressure regulators being stuck worn bores in the valve for the pressure regulator.Also the pressure regulator springs break causing issues.Could you please get me the actual pressure readings from the ones i asked for including the one in park with the trs LP fuse pulled.There is also a step pressure test you can do but it takes a tech2 scan tool what it does is command the pressures from low to high and they have to be within 10psi of commanded pressure.That is a test you use to find a hard to find problem or intermintant problem.Most of the time you can find the problem with the other pressure readings i mentioned.Also has he driven it with a pressure tester watching the pressures while it shifts hard?Just so you can feel at ease listening to me i worked for saturn for over 16yrs iam a factory trained saturn tech.
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