Shudder while gunning it from a stop

2012 Prerunner Automatic 190k miles

Feel a shudder when taking off in first gear from a stop. This only happens with engine under full load, WOT, flooring it. It seems to go away after 1st gear or letting up. It's not a huge deal, I rarely gun it like this from a stop and I don't feel any vibrations or hear anything out of the norm otherwise.

Trans mount is intact and solid. U joints feel solid, no sign of deteriorated needle bearings/dust/play. Center carrier bearing also seems OK, no significant play. The output on the back of the trans is the only spot that seems to have play, though it is minimal and I have read this is normal. I've also read that seemingly solid U joints could still be the problem.

Help?

 

Ive been told its axle wrap, ill wait for a confirmation though.

 

My guess would be axle wrap if your driveline parts are solid.

 

Meaning? Leaf springs unseated? U bolts loose? Sorry I'm noob-ish. Thanks.

 

Axle wrap is usually felt right after letting off the brakes. The tension is released and it gives a bump feeling, kinda like being rear ended.

 

My 98 yukon does that

 

So to make sure I'm understanding what you're feeling correctly, is it like the rear end is hopping when you're hard on the gas from a stop?

 

I have ex

That's pretty accurate. More of a shudder or vibration than a hop though. I very, very rarely feel a very, very slight bump when letting off brakes at a stop. I have felt this way more pronounced on my previous 06 Tacoma. But that one didn't shudder on hard acceleration from a stop like this one.

 

Ive also experienced the acceleration shudder, only under full throttle from a stop. I would say it has something to do with some of the notorious Tacoma driveline vibrations. On mine I know its nothing to worry about. Another words its not a worn out part.

 

I think this is considered normal. Mine has done it since new at anything over 3/4 throttle in first gear. Even does it in 2nd gear at low speeds if I floor it. Not much, but I can notice it. I believe it's due to the shitty leaf springs that bottom out in normal driving around town.

 

It could be a mix of axle wrap and the torque from the driveline causing vibrations. The axle rotates under load changing the angle of the driveshaft, that mixed with our weak springs just makes the whole thing unhappy. Do a little searching, I know I remember seeing a thread about "axle wrap solved" or something along those lines. It was an aftermarket helper leaf that adds a little stiffness to the rear to help reduce those vibrations.

 

Following up

I realigned my carrier/support bearing and that seems to have fixed the shuddering. I didn't use an angle finder but just eye balling it I could see the shafts weren't in line with the trans and diff. It's nice to be able to fully enjoy the truck, and goose it and not have to worry about bad vibes!