Help please.

[DubC75]

Hello newb here and not sure if posting correctly. My apologies in advance. I have a 2009 Chevy Tahoe LS Sport 4.8l . While driving my transmission lost 3rd. Then ask gears. It was a leaky pass through connector. In replaced that then went for test run. Everything was going great then lost 3rd on up. Thought it was shift solenoid or pressure solenoid. So i bought complete master solenoid replacement kit and harness. After install i still do not have past second gear. Could it be the TCM or what could be the issue?

 

[B-train]

What transmission do you have?

 

[OR VietVet]

Welcome to the forum from Oregon.

 

[DubC75]

What transmission do you have?

I believe the 4L60E

 

[89Suburban]

@NickTransmissions

 

[Joseph Garcia]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

I cannot personally assist you with your issue, but other members of this Forum much more knowledgeable than me in this area will chime in.

@89Suburban has already reached out to @NickTransmissions , our resident transmission expert, and he will offer his thoughts and perspectives soon.

 

[NickTransmissions]

Hello newb here and not sure if posting correctly. My apologies in advance. I have a 2009 Chevy Tahoe LS Sport 4.8l . While driving my transmission lost 3rd. Then ask gears. It was a leaky pass through connector. In replaced that then went for test run. Everything was going great then lost 3rd on up. Thought it was shift solenoid or pressure solenoid. So i bought complete master solenoid replacement kit and harness. After install i still do not have past second gear. Could it be the TCM or what could be the issue?

Yank the transmission out for overhaul, 3-4 clutch is wiped.

Refer to my 4L60E Information thread for specifics on overhaul procedures, parts selection, tear down and inspection as well as hydraulics testing, diagnosis and repair.

 

[DubC75]

4L60E

 

[DubC75]

Yank the transmission out for overhaul, 3-4 clutch is wiped.

Refer to my 4L60E Information thread for specifics on overhaul procedures, parts selection, tear down and inspection as well as hydraulics testing, diagnosis and repair.

Thankyou

 

[DubC75]

Welcome to the Forum from NH.

Lots of knowledgeable folks here who freely share their knowledge, experiences, and perspectives. Knowledge is power.

I hope that you will become a participating member in the Forum's discussions.

Pics of the truck, please.

I cannot personally assist you with your issue, but other members of this Forum much more knowledgeable than me in this area will chime in.

@89Suburban has already reached out to @NickTransmissions , our resident transmission expert, and he will offer his thoughts and perspectives soon.

Thankyou NH