Help! Truck "jumping" when put into drive.

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Mar 15, 2004 | 07:33 PM

AirSmitty

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From: Newhall,CA

Help! Truck "jumping" when put into drive.

I have a 1975 f250 4x4 with a 360/c6. Whenever I put it in drive, it wants to jump into gear no matter how hard i press the brakes. The tranny seems to want to engage at too low of an rpm. Is there a way to adjust this?

Mar 15, 2004 | 07:44 PM

78fordman

Cargo Master

Joined: Oct 2003

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From: Jefferson, Iowa

Sounds like the t/c is staying locked up if the tranny has that feature. Might need a new torque convertor. There is a way to adjust the shift point, the detent cable goes down to the tranny. Are the shift points lower than normal?

Mar 15, 2004 | 07:51 PM

AirSmitty

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From: Newhall,CA

It's shifting fine, and it idles fine when I'm stopped for a stop light, but when I shift it into drive it makes a jerk forward then dies if I don't let off the brakes. thanks

Mar 15, 2004 | 11:58 PM

Torque1st

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Joined: Sep 2001

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The vacuum modulator may be bad or need adjustment. There is no cable on a C6. You may need some transmission work. I will move this thread to the tranny forum where the transmission experts are.