Hard downshift during acceleration at highway speeds

Hi All-

I recently purchased a 2002 Tundra 4wd. The transmission has a somewhat hard shift when downshifting from OD to 3rd in the highway. It’s not super hard but there is a noticeable bump felt in the vehicle. It does not occur when you manually press the OVERDRIVE OFF button or when the shift occurs at 40-50 mph. It only occurs at highway speeds and it does every time at those speeds. So far I have done two drain and drills with Toyota DOT 3 fluid. There has been no change. I am considering doing the auto rx thing next.

Any thoughts? I’ve read about the planetary gear but it sounds like that is a huge CLUNK and this has been happening for at least several thousand miles. Maybe a bad shifting solenoid or pressure switch?

thanks

Andy

 

Welcome to the forum. Does your truck have larger sized tires? How many miles on the truck? Do you have a lift or level kit on your truck? The more information you provide the more likely someone may have a suggestion or solution. If you have any photos you can upload them.

 

The truck is all stock with 180k seemingly easy miles. Also, I meant atf 3 not dot 3.

 

Pillow block bearing on the drive shaft may be worn and allows the shaft to slide back and forth...

 

Are you talking about the carrier bearing? Never heard of pillow block bearing. But I can always learn something new.

 

The carrier bearing.... yep. Sorry