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Transmission clunk on downshift while driving in 3rd gear

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Old Apr 10, 2018 | 02:27 PM
  #1  
gregb091's Avatar
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From: State College, PA
Year: 2000
Model: Cherokee
Engine: 4.0 I6
Default Transmission clunk on downshift while driving in 3rd gear

I'm having trouble diagnosing an issue with my 2000 XJ w/ AW4 and NP242. Anytime I drive with the gear selector in 3, which I sometimes do while driving below 50-60mph because I have 3.55 gears and 32" tires, I will hear/feel a single clunk or thud when slowing to a stop. The thump seems to coincide with the transmission downshifting into first gear.

I have an IRO hack n tap SYE installed, so greasing the slip yoke is ruled out. I have a brand new rear driveshaft with new u-joints, and a new Anchor trans mount. I've heard that the Anchor mount is junk, so I have a beefy trans mount on the way from user XJWonders. I also removed the front drive shaft last night, since those u-joints are worn. Clunk still persists.

I'm taking a fairly long trip to go wheeling in 2 weeks, and I'm trying to fix this before the trip. So far, though, I'm stumped. Any thoughts?
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Old Apr 11, 2018 | 01:51 PM
  #2  
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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Try adjusting detent cable yet ?
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Old Apr 14, 2018 | 08:15 AM
  #3  
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Year: 2000
Model: Cherokee
Engine: 4.0 I6
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Originally Posted by freegdr
Try adjusting detent cable yet ?
Yup. I've adjust the TV cable a couple times.
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Old Apr 16, 2018 | 09:52 PM
  #4  
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From: State College, PA
Year: 2000
Model: Cherokee
Engine: 4.0 I6
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Looks like the culprit was the slip joint on the new rear drive shaft needing grease.
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