Does your car lock the torque convertor at low speeds? Low speeds like right after shifting into second gear. I recently was able to purchase an owners manual and it states "it is designed to engage when the vehicle reaches a steady speed above 25 to 45 mph. When engaged, the cluch provides a direct connection between the engine and the drive wheels. On occasion, you may feel certain incidential engine pulsations in the 30 to 50 mph range, this feel is similar to that sometimes experienced in a manual transmission equiped vehicle." Does this sound at all like the way your car shifts and behaves? If I knew someone with a similar car to drive and it acted to same way as mine I would'nt worry. As it stands I have a toggle switch wired into the brake switch to defeat the early lock up.

 

I guess I must have the last Z28 with an lg4 700R4 combination on the planet. I see 8 people looked at the post .

 

my brother has a 85 T/A with lg4 700r4. never done anything like your describing but i only road in it a few times. doesnt sound like anything to worry about tho if the book says it will do it dont worry about it unless something seems major wrong.