"Is anybody out there?(for Floyd fans, lol).

Still having pronounced shudder issues in my '95 3.4L that sat for 13 years. But, ONLY after 45 mph and above & ONLY after overdrive lowers rpms above those speeds.

I replaced tranny filter and cleaned a relatively spotless pan last fall but only drained old fluid out and added 2 tubes of shudder fix w/ minor improvement. So, after winter pause, I'm back at it. I just flushed 8 more quarts through dipstick (2 at a time) to get TC flushed a bit to start the spring off.

My last ditch effort b4 replacing converter will be replacing PWM solenoid, TCC solenoid & all the others since I'm in there of course. The service manual excerpt pic below says to check TPS and other electronic parts first. My tranny shifts very smoovely through ALL gears so I don't know if replacing the coolant sensor & the others would help in my case. I don't even think the solenoid replacements will help but the TCC PWM & the other TCC solenoid failure symptoms sound more relevant to me.

Thoughts on both TCC solenoids fixing shudder? Also, the solenoid kits make $ sense but should I stick with ACDelco or is there a decent non-OEM kit I can use?

Thanks gents.


TCC-related electronics


TCC-related electronics II

 

need a good scanner that lets you see what the trans is doing. may be engine lugging, have you checked spark plugs to see what they look like. also might check 02 sensors to see if fouled