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Old 01-31-2006, 07:10 PM
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68 mercury cougar c4

I am having problems with my c4 going into gear. When the motor is cold, it will drop into drive and reverse fine. It has problems when it warms up though...I have to rev the engine to about 1500 (there is no stall converter, stock converter is in it) in order to get it to move. once you rev it, it drops in and takes off, but even if you are rolling you have to rev it to get it to engage again. I have changed the modulator valve and it has good vacuum. This began after I pulled the motor and rebuilt it (the tranny never left the car and worked well before). THanks

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Old 01-31-2006, 09:31 PM
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Sounds like age has caught up with you and the C4.
Might be pump related due to the engagement problems in forward and reverse. If the converter shifted, even slightly, during engine install/removal it may now have caused damage. The pump gear/converter gear spacing is critical to pump life....
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Old 02-01-2006, 09:38 AM
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I had a similar problem on my C4, I had no reverse when it was cold and it wouldn't stay in gear untill it warmed up or I brought up the RPMs above 1500. Turns out my pan gasket was leaking and I dropped 2qts before I was aware it was leaking. I pulled the pan changed the filter and gasket. The filter looked fine so I expect it was just a low fluid problem.

Have you chcked the fluid recently, motor warm and running and trans in park?
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