800 rpm clunk (1 Viewer)

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Jun 7, 2022
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2004 lx470, 190k I started the "clunk" thread but it's so long I ended up just using the search and couldn't come up with something. My clunk only happens when I re-engage the throttle at 800rpms. At 900rpm or 700rpm...nothing...but at 800 I get what feels like a drive line "clunk". I have greased the driveshaft/u-joints, did a 4x4 and transmission service, but it did not help.

I'm sure one of my cats is dying (got the rattle of death and had a code for that but it erased it and it hasn't shown up again)...but didn't know if this is the issue. Anyone else have this issue? I don't want to throw money at a problem
 
try disconnecting one driveshaft at at at time, and do a test drive around with your center diff locked. My bet is that you hve a u joint that is going bad or loose.
 

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