DriveTrain Lurch (not the thud that's been talked about ad nauseum)

aika1

Member
Hey guys-
I know what the driveline thud is all about, I get it at stoplights and all, even after I lube my driveline and retorque. This lurch is when I'm going 35-50mph. If I let off the gas while i'm in 4wd mode (i have a 2008 v6 sr5), and then put some gas to it again, I get a lag, and then a lurch/thud. I don't get it when I am in 2wd, or at least not anywhere near the same...
I just changed my fluids in both diffs, and the T-case, but I don't know if that's what would cause this, I just thought I'd add it in case. I did it myself, but I'm proficient enough to work on my car, and took great care in doing the diffs. If anything, perhaps the car was not perfectly level when I added fluids, but I don't think that's what would cause this issue. Let me know if there are any suggestions, or if you guys have the same thing in 4wd. Thanks!!!
 
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Everyone states it's below 20 MPH, while mine is from 30-45. Also, I can feel it much much more in 4wd than in 2wd. strange...but annoying! help...!
 

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