Driveshaft clunk in reverse on first drive

[captainpowtown]

Have you checked the U Joints?

Not yet, I'll take a look.

 

[captainpowtown]

What were you doing with the truck before it was parked?

Edit: how many times has th8s happened? A video would be nice. What modifications have been done to the truck?

Just regular pavement driving. This has happened roughly 5 times. Mods include Geisers up front with Deaver HDs and SVC bump stop in the rear.

 

[captainpowtown]

I bet you’re parking on a slope and the truck rolls up against the transmission parking pawl. Try setting the parking brake before you put it in park.

Not a big slope, but yes my driveway does slope a bit to the front and driver side. If this is the case, any idea what the noise would be?

 

[smurfslayer]

This is a family friendly site

Not a big slope, but yes my driveway does slope a bit to the front and driver side. If this is the case, any idea what the noise would be?

it’s enough. Try using the parking brake - stop, foot on brake, put in park, keep foot on brake, engage parking brake, then release the brake pedal.
Let us know if it continues.

 

[captainpowtown]

View attachment YouCut_20231221_084456327.mp4 U Joints seem good. Parking brake didn't make any difference. The sound seems to be less when it's above freezing. This leads me to think that it's just the body shifting after being parked and frozen all night. I had my wife take a video and it's hard to pinpoint.

 

[GordoJay]

It doesn’t sound like a rotating part, it’s too random.

 

[FordTechOne]

Start with the rear suspension, especially since the rear springs were replaced with aftermarket. Were the bolts all torqued to the required specifications with the weight of the vehicle on the springs?

 

[thatJeepguy]

Thanks for playing “ diagnose my truck on the internet” . What do we have for the winners Johnny?

 

[captainpowtown]

Start with the rear suspension, especially since the rear springs were replaced with aftermarket. Were the bolts all torqued to the required specifications with the weight of the vehicle on the springs?

I'll check spring bolts this weekend. If that were the case though, I would assume it would be more consistent and not just initial reverse out of driveway.
Thanks to everyone who put in their $.02. This has got me scratching my head.

 

[captainpowtown]

Thanks for playing “ diagnose my truck on the internet” . What do we have for the winners Johnny? View attachment 437570

It's my favorite thing about auto forums. So much knowledge to tap into and people are willing to help others.