Transmission rumble

Greetings,

Vehicle info:
220500miles
2005 Tacoma PreRunner Double Cab 2WD 4.0L V-6
Transmission A750E (5 Speed Automatic)

Issue: Truck is experiencing the shutter or “rumble strip” effect between 30 and 40 miles per hour. If I pay attention I can accelerate through the condition and it’s not so noticeable. I’ve had a local shop look into it and they state it’s an issue with the torque converter. I have read post on Tacoworld.
I was able temporarily relieve the condition by doing a transmission filter and fluid change. Lasted about 7k miles. Condition seems to be getting worse though and there is a concern I’m just compounding the issue by limping it along. Money is beyond tight at my household but may have some wiggle room.

My questions are:

1. Should I continue changing the transmission fluid every 4 to 6 months until failure then deal with it?

2. Should I look into a lower mileage used transmission/torque converter (wreaking yard) or remanufactured transmission/torque converter? Remanufactures that I’ve looked at seem, sketchy. Pricing varies widely. I would think a remanufactured transmission would be sure thing. But unsure who is really reputable. Would getting mine pulled and rebuilt be the thing do?

3. Who would be a good go to facility to obtain parts and diagnostics. Related to questions 2. Also, I live in Houston, Texas who can I trust to give me a good honest evaluation and possible work?

Appreciate any help or advice. I’ve touch on this subject before. Been researching issue on TacoWorld for some time. Just don’t want screw myself.

Previous posting with advice from GearCruncher - https://www.tacomaworld.com/conversations/transmission-for-2005-tacoma-preruuner.2585752/

All the Best,

Kevin S.

 

Are you sure you followed the correct procedure when checking the ATF level after doing the service?

Do pre-runners have a carrier bearing?

 

I believe this guy is in the Houston area although I'm not sure where exactly, I've seen his shop info on one of his videos.
https://youtube.com/c/AutomaticTransmission