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I have a 1997 chevy 2500 4x4 with a 350 and 700r4 trans that is not shifting into overdrive. All other gears are shifting properly and strong. Could it be a solenoid or is there a cable for the overdrive?

Submitted: 39 days and 6 hours ago.

Category: Chevy

Value: $15

Status: CLOSED

Posted by GM Tech 39 days and 5 hours ago.

Info Request

Welcome. Can you please clarify which transmission you have? The 700 R4 was not used after 1993, and your truck being a 82500 series should have a 4L80 E. What is the shape of the transmission pen?

39 days and 5 hours ago.

Reply

You're right is is 4L80 E. I had a stroke and it screwed up my memory badly. I apologize.

Posted by GM Tech 39 days and 5 hours ago.

Info Request

No problem. Is the check engine light on? Are you only missing fourth year?

39 days and 5 hours ago.

Reply

No check engine light. Just 4th.

Posted by GM Tech 39 days and 5 hours ago.

Answer

OK. Fourth gear has its own set of clutches and planetary gear set just behind the pump. It is likely, that without the check engine light there is not an electrical issue. Rather I expect there is a mechanical issue such as a burnt clutch cut seal or binding valve in the valve body. What is the color and condition of the transmission fluid? One OK

39 days and 5 hours ago.

Reply

Fluid was changed about 5 months ago and is nice and looks like new (light reddish color)

Accepted Answer

OK, the fact it's pink and not brown indicates more of the cuts seal or valve body issue that a set of burnt clutches. I suggest you start by taking off the transmission pan, and inspecting what's in the bottom. Open up the filter, open the felt inside the filter, and see what is inside the filter.

Accepts:
Expert:	GM Tech
Pos. Feedback:	99.5 %
Answered:	10/15/2009

Chevy Technician

GM Grand Master Technician 2007. 9 years Automotive experience, 7 years with GM. Just Answer Mentor

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Question

I have a 1997 chevy 2500 4x4 with a 350 and 700r4 trans that is not shifting into overdrive. All other gears are shifting properly and strong. Could it be a solenoid or is there a cable for the overdrive?

Info Request

Welcome. Can you please clarify which transmission you have? The 700 R4 was not used after 1993, and your truck being a 82500 series should have a 4L80 E. What is the shape of the transmission pen?

Reply

You're right is is 4L80 E. I had a stroke and it screwed up my memory badly. I apologize.

Info Request

No problem. Is the check engine light on? Are you only missing fourth year?

Reply

No check engine light. Just 4th.

Answer

Reply

Fluid was changed about 5 months ago and is nice and looks like new (light reddish color)

Accepted Answer

OK, the fact it's pink and not brown indicates more of the cuts seal or valve body issue that a set of burnt clutches. I suggest you start by taking off the transmission pan, and inspecting what's in the bottom. Open up the filter, open the felt inside the filter, and see what is inside the filter.

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