4T60-E shuttering

[grandamguy]

I have a 96 Grand am 3100 V6 4T60-E trans 4spd auto. at 50-55 mph there is a shuttering from the transmission. if i drop it back in 3 it goes away. i have changed the oil and filter and added a bottle of lucas but nothing helped. and suggestions?

[bszopi]

You may find this very odd, but I bet you have a bad coil pack. All the times I've had coil packs fail on me (twice?), its done the exact same thing...

[grandamguy]

then why dosen't it shutter in 3?

[grandamguy]

how can i check my coil pack?. it would be expensive to buy and not need it.

[grandamguy]

well i borrowed a pack from a friend, same problem.

[BadGrandPrixSE]

Torque Converter lockup/mechanism. Input shaft, gear going bad. It may be one of these. My trans did the same thing for while. Tap on the brake pedal when it begans to shutter and see if that makes it go away. If so it has something to do with torque converter locking up

[grandamguy]

could it be the TCC?

[bszopi]

Did you check all 3 coils?

[grandamguy]

well i got 3 coils from the autostore and installed them, its not has bad now, i guess its back to the autostore tommorrow for new wires and plugs. gonna take the canadian tire crap wires off and get some ac delco plugs too. will post results tomorrow.
never had this much trouble with the last 3 dodges i owned.

[coryatver]

my car does the same thing. Do z34's have coil packs also?

[grandamguy]

my nephew has a montr carlo with a 3.4. it has coil packs. just check where your plug wires connect to. if there are coil packs, you should see 3 coils .

[grandamguy]

well i replaced the plugs and wires and it's still the same. if i touch the brake i does not go away. could it be the controler for the coil packs? the shuttering is the same has a manual transmission labouring.
I need this fixed because the wife is getting on my nerves about it. nag nag nag.,

[Lowerd1]

Go back to the TCC! They sell a product called a TCC adjuster for our cars. I did some searching for the problem since mine also shutters like that. Its always at right around 2000K rpms maybe alittle below, 50mph and acts like the car is confused at this speed. I asked a mechanic about it and he said it was just a normal Automatic, but that sounded like BS to me.

Here is the link.

http://www.otsparts.com/products.htm

The TCC Adjuster functions by altering the computer strategy that controls the TCC which yields the folowing advantages:

1. Cures shudder problems caused by slow application.
2. Reduces Clutch Slip
3. Reduces heat in the Converter Clutch.

Another advantage of the TCC Adjuster is it helps to ensure that the TCC is not brought in too early while under heavy acceleration.


3. Reduces heat in the Converter Clutch.

[grandamguy]

well the coils, wires and plugs didn't do a thing so i just ordered a TCC. if that don't work it's goodbye grand am hello stratus