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Transmission Help..

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    Alex OrndorffAlex Orndorff
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      I have a 2002 Buick Park Avenue Ultra with the 3.8 Supercharged Series 2 motor. I had the transmission completely rebuilt. Its the 4T65E-HD trans. After they rebuilt it, it went back to that shop 4 times because the way it shifted was still terrible. They replaced the shift solenoid 3 times, and finally replaced the valve body because that ended up being bad because the valves were sticking. Thought that would fix the problem, but nope. The problem ONLY occurs when the transmission is HOT. Never cold. Shifts beautifully when the car is still cold. After it gets up to operating temperature, it doesn’t take long for the trans to start acting up. Its hard in pretty much all gears. Also, say i’m at a cruising speed, if I put the gas pedal to the floor and let up quickly, the whole car just jerks a couple times. (I did this to test the mounts)
      The whole transmission is rebuilt, brand new valve body, new solenoids etc.. The only thing i can think of is these guys don’t know what they’re doing, or the mounts are bad and they couldn’t figure that out. Does this sound like bad transmission mount symptoms? I was thinking the mounts are obviously rubber, so after the trans gets hot, heat transfers, the mounts expand, etc etc. And thats why it shifts hard. Anybody else have some advice about it and what i should do? These cars have 3 transmission mounts too. Also, way to tell exactly how and if a mount is bad? Thanks ahead of time.

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