92 Grand Caravan Shudder at 45-50 mph

[dybber]

Hello all,
I have a 92 Grand Caravan 3.3L which has developed a shudder at 45-50 mph. If I accelerate to 50 then let off the gas pedal slightly I wil get the shudder. If I take foot off gas(no shudder) or if I accelerate through it (no shudder). I have replaced tranny fluid and filter and have flushed with ATF3. The shifting through the other gears appear normal. There seems to be a slight hesitation(intermittent) on acceleration. I just want to eliminate certain things before looking into the Torque Converter. For a rough idle condition(That is still present) I have replaced plugs,wires,fuel filter, and cleaned throttle body. There may or may not be a relationship here. There are no Error codes present. Thanks for your help.

[RexNfx400]

Most likely only someone that has experienced missfire compared to transmission/converter shudder(chatter by us tranny guys) will know the difference for certain. But converter chatter will feel more like when your driving up a dirt road that has alot of washboard to it. While missfire usually gives more hard hitting bucking and jerking feeling and doesn't feel rotational.
hth

[dybber]

Originally Posted by RexNfx400

Most likely only someone that has experienced missfire compared to transmission/converter shudder(chatter by us tranny guys) will know the difference for certain. But converter chatter will feel more like when your driving up a dirt road that has alot of washboard to it. While missfire usually gives more hard hitting bucking and jerking feeling and doesn't feel rotational.
hth

I would have to say it is more of a bucking/jerking feeling at 45-50 mph.
Could the low/erratic idle be related to the 'misfire' at 45-50 mph? What are the normal steps to isolate the misfire other than the ones I already took on my original post?