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Hi all,
My turbo 400 will shift fine from 1-2 but will not shift 2-3. Reverse feels good but just finished the swap so no reference to compare to.
What I have tried so far: new modulator valve line, also measure vacuum on line from lq4. 17 in lbs. I don't think it is collapsing under vacuum.
Adjusted modulator shift screw a couple of turns more aggressive
Pulled vacuum modulator valve and checked vacuum, it does not leak air when out or fluid when in
Pulled modulator valve to inspect for damage, burrs or sticking. It required a little pull to get out, not crazy though. It looks good.
Re-installed, topped off fluid and test drove. Still no shift from 2-3. Also made sure pan gasket was not blocking full seat of vacuum modulator.
Ideas where to check next? Governor weights?
This is a freshly rebuilt trans btw. Some outfit in northeast and I am in South Alabama.
Sent from my SAMSUNG-SM-G930A using Tapatalk
My turbo 400 will shift fine from 1-2 but will not shift 2-3. Reverse feels good but just finished the swap so no reference to compare to.
What I have tried so far: new modulator valve line, also measure vacuum on line from lq4. 17 in lbs. I don't think it is collapsing under vacuum.
Adjusted modulator shift screw a couple of turns more aggressive
Pulled vacuum modulator valve and checked vacuum, it does not leak air when out or fluid when in
Pulled modulator valve to inspect for damage, burrs or sticking. It required a little pull to get out, not crazy though. It looks good.
Re-installed, topped off fluid and test drove. Still no shift from 2-3. Also made sure pan gasket was not blocking full seat of vacuum modulator.
Ideas where to check next? Governor weights?
This is a freshly rebuilt trans btw. Some outfit in northeast and I am in South Alabama.
Sent from my SAMSUNG-SM-G930A using Tapatalk