Shift body sticking

2003 CHEVROLET SUBURBAN
190,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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MIKE CRUZER
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driving on the road dollar training line popped off on the transmission put it back in and now it won't shift into third and fourth seems like we're going about 70 and shift didn't seem like it was in third wasn't slipping or nothing not sure if we got shift body issue or where I should start going all the fuses are good thank you
Jan 22, 2019 at 6:54 PM
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ASEMASTER6371
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Good evening

Do you mean the transmission cooler line from the radiator?

If you did, how far did you drive it like that? You may have damaged the clutches or the valve body from lack of pressure.

https://www.2carpros.com/articles/automatic-transmission-problems

I would start by changing the trans oil/filter and see if there is any debris in the pan or the magnet.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Roy
Jan 22, 2019 at 7:27 PM
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MIKE CRUZER
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Yes cooler line slid back lower line side of tranny pulled over added quart fluid couple miles back home in second fixed total of about 4 quart lose tranny used been in about 4 months had 100000 miles on it maybe put on 5000 sense it's been in it doesn't seem like its hitting 3rd on freeway pretty sure got it into 3rd about 70 mph rpms weren't maxed felt good no slip
Jan 23, 2019 at 2:09 AM
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ASEMASTER6371
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It won't slip if it is not shifting.

I would start by changing the oil/filter in the transmission. Then check for anything in the pan magnet.

Roy
Jan 23, 2019 at 4:54 AM