Shudder noise/ Vibration 94' 4Runner

Joined this site, co-worker recommended it.

I am trying to dial a noise in... might be tranny - like a shudder, here is the readers digest version.

Bought 1994 4Runner 4wd four door, automatic with V6, for my daughter mid last year.

Truck mileage is around 97, 000, yep checked it against car fax to make sure odometer wasn't turned back... it is pretty damn clean and the prior owner had a lot of work done by paying lots of money to local shops. I have looked at blogs and had some mechanics drive and listen to noise so I started the process:

• cleaning the transmission filter with new fluid - NOPE
• new "U" joints NOPE
• new Pinion Bearings and Carrier bearing with fresh diff oil, NOPE
• flushed the transfer case, NOPE
• No leaks around or play in the Front or Rear Wheel bearings
• Recently replaced the 9yr old tires too and did another flush of the tranny NOPE.

I have been through the entire cooling system - radiator, belts, hoses, fan, fan clutch, t-stat - prior owner replace the water pump and timing chain, CV Joints with new shocks...doubtful this was the noise, but rules out those possible issues too.

I don't mind replacing all these items as I want to make it safe for my kid, but running out of options on this vibration/noise at deceleration - very noticeable when decelerating from 40mph and above.

Any suggestions would be helpful, may take it by a few tranny places and get their input, but would rather wrench on it myself.

 

Have you had the front differential checked? Does it shudder in 4WD?

 

Shudder exists in our out of four wheel drive - have not had the front differential checked yet...

 

Had "u" joints replaced and drive line balanced ... that finally took care of my issue. A little bit of vibration coming from transfer case at speeds above 70+

 

Glad that solved the issue.