High Idle & Hard shifting
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Junior Member
Joined: Jan 2013
Posts: 25
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From: Michigan
Car: 1989 Firebird Formula 350
Engine: 5.7L 350
Transmission: Automatic 700R4
High Idle & Hard shifting
Hi,
I have a 1989 350 5.7L TPI. I recently rebuilt the transmission, and it has suddenly begun to idle at about 1800 RPMs.
It will not downshift from 2nd to 1st until a few seconds after I come to a complete stop, so the braking is hard.
From 1st to 2nd, it will upshift at about 1500 RPMs.
I noticed this on my way home from work, and I stopped to check oil/fluid/throttle cable in a parking lot. Everything seemed fine, but it stopped. It was shifting properly again and I drove it all weekend without any complications. But on my way to lunch today, it started up again.
Any ideas of what the problem may be?
I have a 1989 350 5.7L TPI. I recently rebuilt the transmission, and it has suddenly begun to idle at about 1800 RPMs.
It will not downshift from 2nd to 1st until a few seconds after I come to a complete stop, so the braking is hard.
From 1st to 2nd, it will upshift at about 1500 RPMs.
I noticed this on my way home from work, and I stopped to check oil/fluid/throttle cable in a parking lot. Everything seemed fine, but it stopped. It was shifting properly again and I drove it all weekend without any complications. But on my way to lunch today, it started up again.
Any ideas of what the problem may be?
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