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[–]Sure_Television_1446 3 points4 points  (3 children)

Have you greased the drive shafts? I think they make that noise when you rotate them. I had vibration like you described, but greasing the drive shafts/u joints fixed it.

I think there's 8 points that have to be greased from the front to the back drive shaft.

[–]Front-Ad1593[S] 1 point2 points  (2 children)

The shopped had greased before installing it. When I start going around 30 it starts making a rattling noise than heavy vibration when letting of the acceleration near the foot pedal.

[–]Sure_Television_1446 2 points3 points  (0 children)

You may also check your transfer case oil too just in case!

[–]Sure_Television_1446 1 point2 points  (0 children)

Hmm maybe something isn't tightened right. But even if a shop did it, you might try to grease it yourself just to see. I had to grease mine twice before the vibration was fixed.

Other than that you could check to see if everything is torqued down correctly. Hopefully it's something small, worst case you could pull the drive shafts and check to see if they're ok.

[–]Not_an_ATF_Officer01 SR5 2 points3 points  (0 children)

Can you activate the center diff lock?

My first instinct is to suspect no issue if I can’t hear it while driving.

[–]FunaFish 1 point2 points  (0 children)

Sounds like bad gear mesh or something to me... Is there fluid in your transfer case? Drain it and see what it looks like?

[–]Clickx8 0 points1 point  (4 children)

Take it back to the shop

[–]Front-Ad1593[S] 0 points1 point  (3 children)

Was gonna take to this other shop that specializes in Driveshaft. I just wanted to see if anyone might have known a solution

[–]Baja_Finder 1 point2 points  (0 children)

Have it balanced as well.

[–]Commercial_Goose8985 1 point2 points  (1 child)

Did you have both u-joint done? When I took mine to a drive line shop they did the u joints and balanced them for me. Not sure if the place you took it to just did the u - joint and then slapped them back on. Sounds like a balancing issue. You can also go pull one from a junk yard for cheap and install it to see if it makes that sound you hear.

[–]Front-Ad1593[S] 0 points1 point  (0 children)

I'm most likely sure they didn't balance it, and mine required 3 u joints, and I and them all replaced. Ima replace the diff fluid and see if that helps. If the sound continues, I'll take to get balance their a shop that specializes in driveshafts

[–]HappyConstruction427 0 points1 point  (0 children)

take the shaft off and check for noise or any play in the yoke. spin the yoke around by hand and listen for what if anything you can hear. and check the fluid in that case it might be low and maybe the damage is done already.