Tranny question on '00 (1 Viewer)

[ZJ2UZJ100]

I've got a thunk. But I think it's the Tcase.

Both my front and rear drive shafts have between 2 or 3 degrees of play. I can twist them by hand.

It appears all the play is between the TCase and the diffs. The U-joints are still nice and tight.

I think this is what gives a little thunk every now and then.

 

[dclee]

Yeah, something you learn to live with in a full-time 4WD vehicle. Most 100s are too new for this to be noticeable yet. A little bit of backlash throughout the drivetrain has a cumulative effect and manifests as a thunking noise/sensation (i.e. a tiny bit of play in two diff flanges, all four prop shaft u-joints, two T-case flanges, etc. all adds up). Tolerances will loosen up as the miles go by (most of the 80 Series guys have thunks that would make you cringe as a 100 owner), but I don't believe there is any mechanical concern, aside from how high is your "annoying noise" tolerance.

 

[NMuzj100]

All 4x4 trucks are going to have some Driveline "play" and whether it bothers you is is partly dependent on how tight your "pink panties" are.
2007 Lexus w/ 100 miles on it vs. 1998 LC 100 with "Arizona pinstripes" and trail dents.

100 series lube diagram - to fix the problem

80 series FAQ on Driveline "Clunk" - If you have broadband and too much time on your hands