VDH5.
You should have a 1st, 2nd, 3rd, TCC apply, 4th gear pattern. The torque converter clutch will release momentarily during a 4-3 downshift and there will be a 2nd gear TCC apply if you stand on the accelerator above 16 MPH.
Sounds to me like you're feeling the torque converter clutch apply as the "undetectable" shift. The 3-4 upshift will drop a lot of RPM....that's normal. If the 1-2, 2-3, and 3-4 shifts are firm, then I would say that the transmission has been violated.
Sounds like you have an aftermarket valve body in the transmission and a stock torque converter.
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Tuning, flashing, burning chips, and repairing all aspects of 7.3L Powerstrokes.
SEVEN 7.3L-powered vehicles in the driveway. Two didn't come that way from the factory!
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Mon, May 16th, 2011, 07:54 AM
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