user name

This is what I was thinking too. Sure the tend to spin a little with everthing unlocked but shouldn't be spinning fast enough to vibrate.


On to the advice portion. When you lifted the truck you should have ground out the stops in the double cardon area to allow more travel. Did you do this? If not get the lift instructions back out they will probably a nice description and diagram of what needs to be ground. If nothing else is broken in the driveshaft put it back together keep the hubs unlocked and tcase in 2wd when you don't need 4wd and the DS will last just fine. I've run them at far worse angles than you get out a 4" lift Dodge without major issues.

cougar

You should have lots of drive shaft travel room like this

See what happens with just a little more travel?

That was just enough to start breaking mine. Even though it looks like I have a hair to spare, It ain't there in the real world.
PS: I never unlock my hubs.

oliver foster

On my '85 crew with 6 inches of lift, I had to grind clearance for the upper double u joints to spin freely.
Otherwise they would just push themselves apart in no time flat.

maybe368

Just wondering why...Mark

NJTman

My guess is he lives in a remote area of Alaska ????

Unpaved roads, muddy terrain, ugly hookers that he needs to make sure he can get away from in a pinch...

cougar

I started leaving my hubs locked after I had to have a 5 year old front axle rebuilt 25 or so years ago. Locking your hubs once in a while for a few miles doesn't keep them lubricated. It also doesn't stop your drive shaft from sitting in one spot all the time and beating the splines to death. I've had a lot fewer problems sense I started leaving them locked. And no, I haven't seen any difference in fuel mileage or performance.

93-331-29psi

I rebuilt my stock double cardan joint. The hard part was melting the plastic cap retainers out. Went back together easy and should be good for another 100k. In total it cost me about $100 for the parts (Moog Heavy Duty) at my local parts store. Took me about an hour to replace all 3 joints. Good luck

mknittle

Getting away from ugly hookers is a good reason to keep them locked.

209trucker

I do not know why the front drive shaft is constantly spinning, I always leave my hubs unlocked and my transfer case in 2H, should it be of importance I added roughly half a cup of fluid to my transfer case the other day, after about two months since I had filled it last. I haven't been driving the truck lately... back in the stroker. Still says I'm overheating, and the motors actually feeling hot now. I'm going to pull the thermostat today and clean it up, hopefully it'll change something. I last ran it on Saturday after I replaced my lift pump, then my water pump since it had just started leaking.

To cougar: driving with the hubs locked is beneficial to the truck? I'm leaving my front drive shaft out for now... not like it matters much, since I haven't been driving the truck.

Checked all my fluids and everything was good, added roughly a pint to her, but need to change my oil soon anyways. But with the engine running, I pulled the cap to my oil fill and I can hear a pinging noise. Blowby, fuel bubbling up from the injectors. Problems that I didn't have before starting to do 200+ miles a day for work. Except for the blowby... there was light blowby when I purchased the truck but now it seems excessive. Since I purchased the truck in August of last year I've put roughly... 18k? miles on it, did not have a working odometer until a few months ago. But with roughly 500k miles and no records of a rebuilt motor there's not much I can say about it.

Thanks for all of the input guys, very much appreciated.