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Old 08-12-2006, 07:43 PM   #1
Ramon_12345
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Default 4EAT Shifting Problems

My mom owns a 1500cc 1999 Subaru Impreza. It is an automatic with the 4EAT transmission and recently she has been having some problems with her transmission. The engines’ rev counter goes up to 4500 rpm before any shifting occurs and when it does shift, there is a “shock”, like if the car wants to “jerk” forward.

What is noteworthy is that it recently came back from my mom’s mechanic and he took off the throttle position sensor and he replaced it with a sensor from another vehicle because he thought that the sensor was the reason for another problem that we were having (that hesitation problem has since been rectified) and in addition to that he overfilled the transmission .

When my mom drove it home that evening the transmission would not shift at all so when she carried it back the next day, he drained off some of the transmission fluid, changed the transmission fluid filter and put back in the old throttle position sensor. It started shifting, but it would only shift at high rpm’s, such as 3000 – 4500 rpm.

It should be noted that the transmission fluid was fully flushed on November 15 2004 as well as the transmission fluid filter changed.

I am wondering if anyone has experienced these shifting and “shift-shock” issues and can provide me with any useful information regarding any checks that I can make before she carries it to our local dealer, as if I can rectify the problem that would be money saved.

Thanks in advance!
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Old 08-12-2006, 10:26 PM   #2
Master2192
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Default

Quote:
Originally Posted by Ramon_12345
he overfilled the transmission .

When my mom drove it home that evening the transmission would not shift at all so when she carried it back the next day, he drained off some of the transmission fluid, changed the transmission fluid filter and put back in the old throttle position sensor. It started shifting, but it would only shift at high rpm’s, such as 3000 – 4500 rpm.

It should be noted that the transmission fluid was fully flushed on November 15 2004 as well as the transmission fluid filter changed.
Sounds to me like he may have damaged the transmission by overfilling it. However I would check the fluid level first and make sure it isn't low or still overfilled. But it might be time to find a used tranny in a junk yard.
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Old 08-13-2006, 12:37 PM   #3
Ramon_12345
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Quote:
Originally Posted by Master2192
Sounds to me like he may have damaged the transmission by overfilling it. However I would check the fluid level first and make sure it isn't low or still overfilled. But it might be time to find a used tranny in a junk yard.
I checked the fluid level and it is good, however I really hope the transmission isn't "cooked".

I was wondering if recalibration of the throttle position sensor might help since it never had that problem before and only started acting up after the TPS was taken off and put back on. Maybe it needs to be set.

Any thoughts?
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Old 08-13-2006, 08:40 PM   #4
me gusta pantalones
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thats a bad part in the tranny. possibly torque converter
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