1996 Corvette transmission shift issue.

[SonnyMarrow]

Whenever I am in overdrive (around 43+mph) and push the pedal to the floor, the passing gear does not engage as it should. It feels like it is shifting into 3rd, then 2nd, and possible back to 3rd all within a couple seconds. The car is almost gear hunting any time it has to shift from OD to the passing gear. It's the 4L60-E and just recently had the fluid totally flushed and the filter replaced. I have a video so people can hear what I mean. The engine sound tells it all. In the video, my foot is on the floor until the very end. All that RPM changing is the issue at hand.

YouTube - Shift Issue

 

[Schrade]

Why the fluid flush and filter change? Was this problem showing BEFORE the work? Did it start after the work?

 

[SonnyMarrow]

It was like that before. The fluid was dirty, so I had a full flush done, and I changed the filter and cleaned the pan/magnet really well. The service didn't affect anything. Under light to moderate acceleration it is fine and shifts really hard and well. The problem is when it has to go 4 to 2, it doesn't go straight into 2. It goes 3-2-3 as you can hear. Dealer couldn't figure it out because it isn't throwing codes.

 

[SonnyMarrow]

Can anyone direct me to a place/person that would be able to help me with my issue? I thought about calling Bow Tie.

 

[Schrade]

It was like that before. The fluid was dirty, so I had a full flush done, and I changed the filter and cleaned the pan/magnet really well. The service didn't affect anything. Under light to moderate acceleration it is fine and shifts really hard and well. The problem is when it has to go 4 to 2, it doesn't go straight into 2. It goes 3-2-3 as you can hear. Dealer couldn't figure it out because it isn't throwing codes.

REALLY hard??? Especially from 1 - 2?

 

[SonnyMarrow]

I mean, fairly hard. I have another with a 700R4 and a shift kit that is harder, but it's definitely a clean bang into the gear. Is a hard shift bad? I thought it was semi-good. I'm really chasing my tail. My TPS is from 0.57-4.48, and I still need to check my MAP sensor.