Problem shifting to second & scraping sound

[PaulGoldstraw]

I have two problems with the transmission on my 1998 GTP.

1. Shifting problems - In order to get the tranmission to shift into 2nd gear I have to lift my foot off the gas pedal. It will then shift to 2nd. When slowing down there is a "clunk" when it shifts down to 2nd. Getting code P0751 when I plug my scanner in.

2. Noise - In 1st and 2nd there is a scraping sound. The sound is only present when accelerating in 1st & 2nd. Once in 3rd this sound goes away.

The transmission fluid and filter have both been replaced recently.

My questions:

1. How easy is it to get to the solenoids to clean them?
2. Any ideas on what the scraping sound is?
3. Would a transmission flush help?

Thank you in advance.

 

[BillBoost37]

Paul.. what does code 751 stand for?
Mileage on trans?

Here's a how to on getting the side cover off. Once the cover is off, the soleniods are right there.
http://www.grandprixforums.net/how-transmission-4th-gear-side-cover-access-54448.html

 

[PaulGoldstraw]

Paul.. what does code 751 stand for?
Mileage on trans?

Here's a how to on getting the side cover off. Once the cover is off, the soleniods are right there.
http://www.grandprixforums.net/how-transmission-4th-gear-side-cover-access-54448.html

P0751 means Shift Solenoid A performance or stuck off.

255000 miles on the transmission.

Thank you for the link - I'll check it out

 

[Jevik]

P0751 CHEVROLET - 1-2 Shift Solenoid Stuck Off
Doh, he beat me to it.

Read more: P0751 CHEVROLET - 1-2 Shift Solenoid Stuck Off - OBD2-OBDII Engine Light Trouble Code| Engine-Codes.com

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[BillBoost37]

With a stuck off, I'd start off ohming the solenoid based on the wiring. This can be done by popping off the connector at the trans. I think there's info on TripleEdgePerformance.com for the resistances or in the trans info link by me here on the site. From there, I'd probably pick up a soleniod and or internal wiring harness before going in.