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Shift points and RPM

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Old Nov 3, 2013 | 06:04 PM
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Ldouble619's Avatar
Ldouble619
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Default Shift points and RPM

Hello,

I recently acquired a 1979 base coupe. I was told the trans was rebuilt... This is my first experience with a GM product.

When I let off gas the RPM drops to idle and when I get back in the gas the rpm will go up due the car shifting at ~30mph (1st-2nd) and 45-50 (2nd- 3rd).

Is this normal? I feels very weird to me, especially when cursing through the neighborhood. Like it has a high stall convertor or something. If I floor it and let it shift through all 3 gears its shifts fine.

may be a dumb question, but I'm not looking to break anything at this point.

Thank you.
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Old Nov 4, 2013 | 02:39 PM
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Does not sound normal. Start with checking the throttle shift cable adjustment and fluid level.
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Old Nov 4, 2013 | 03:28 PM
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Sounds like a vacuum leak in the modulator line or someone has cranked up the adjustment in the modulator.
Mike
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