Transmission

SAMUELOTOOGHANA

MEMBER
2011 KIA SORENTO
2.4L
4 CYL
FWD
AUTOMATIC
99,000 MILES

I changed my transmission valve body but when transmission fluid gets hot, the gears whine and does not change well. Oil level is fine and I used Xcel SP IV oil. Could it be any of the solenoids? Car works fine until it heats up. What could be the problem?

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,185 POSTS

Hello,

Yes it sounds like you may have a bad valve body and the selector valves get hung up. You will need to take it back apart to see what happened. Can I ask why the replacement in the first place?

Please let us know what happens.

Cheers, Ken

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Tuesday, July 11th, 2017 AT 4:39 PM

SAMUELOTOOGHANA

MEMBER
2 POSTS

There was an oil leakage, clutch got burnt. I changed the drum, and then my mechanic tampered with the solenoids. It was not changing well so I was advised to change the valve body. Prior to this I changed the whole gearbox twice with used ones but they were all whining around the second and fourth gears. So I changed back to my old gearbox. I noticed my old one was working when I engage them manually but the moment I shift to automatic it begins to whine at the third and fourth gears. I was then advised to change the valve body which I did. That one drives perfectly but the moment the fluid gets hot, then it acts up.

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Tuesday, July 11th, 2017 AT 8:42 PM

KEN L

MASTER CERTIFIED MECHANIC
47,185 POSTS

It sounds like you have an internal seal that has gone bad. It might be time for a rebuilt or low miles used unit.

Please let us know what happens.

Cheers, Ken

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Wednesday, July 12th, 2017 AT 11:23 AM