Vibration/Shudder 25-40mph - Tires?

[imholtandrew]

I have a 2003 Montero Sport XLS. Has about 91,000 Miles.

A couple weeks ago, I noticed a vibration at about 25-40 mph. Took it into the shop.

They said I needed to get new tires, as the different tread depth (Front were both basically new 12/32 & both rear worn to 6/32) was causing the vibration.

They also said ball joints needed to be replaced within the next 6-8 months and that would cause vibration as well.

Purchased exact same tires (tire shop said fronts were 11/32 & new rears were 12/32) this past Monday and there is still a vibration when I get up to 30-40mph.

Will it take time to adjust? I've only driven about 25 miles since getting new tires put on.

Or is it the Ball Joints?

Suggestions/Help is greatly, greatly appreciated!!

[buggzyy]

Its probably not the ball joint, its probably the front wheel bearings needing a repack. also the idler arm may be worn. if those are ok you may be feeling a torque converter shudder try putting the trans in neutral while the vibration is happening does it change if so its in the drivetrain if not its somewere else.

[imholtandrew]

Will try putting trans in neutral next time I feel the pulse/vibration. I've also noticed it usually happens while I'm accelerating up an incline.

I'll re-post this evening with an update!

Thanks!

[ivanthemonterrible]

I had a similar problem with my 00. It was the torque converter shudder. Got my tranny flushed and a new filter and I was back in business. Not a hint of the shudder and that was 10k miles ago.

[imholtandrew]

Well, put the trans into neutral when it started vibrating/shuddering (around 30-40) and vibration stopped. All I heard/felt was the rpm's revving up.

Next steps?

Thanks for the help!

[fwkey123]

hi..have exactly the same problem..i was told to drain/change tranny fluid...haven't done that yet..any other ideas?

what i have done is rotate and balance the tires but no change