94 GT AODE overdrive problem

I have a 94 gt with AODE, it has about 58k miles on it , and a Baumann shift kit. First, second and third gears shift fine but when it goes into overdrive at medium throttle the transmission makes the car shudder/vibrate, but if you have it at a very light, or heavy throttle it shifts ok. What could cause this? My only idea is maybe the torque converter clutch solenoid is going bad, or is it something worse?
 
I have a similar problem except mine shutters if there is only little throttle. I was told it was the torque convertor. I have not replaced it yet, just make sure I give it a little more gas.
 
Common problem. Changing the TC will fix this, but you dont need to with so few miles on the car.

Trust me on this one: get a tranny fluid change, and mix in with the product a liquid made for "shuttering" problems.

My mechanic used a product called "shutter guard", but I have seen people chime in on these posts and they listed another product.

Do a search in the forum under "transmission Shutter" and see what turns up.
RC
 
rodi_1775_34642131


I think this is the other additive

RC