neohic Posted February 4, 2012 Posted February 4, 2012 Just making sure I'm looking in the right direction... Under my '88 Pioneer, there is a distinctive clunk when the truck is in 4wd and going in reverse. The noise sounds like it's right under the cab and there is all kinds of slop in the front driveshaft. I would assume that the chain in my transfer case took a crap. I don't know how many miles are actually on the truck as the speedo didn't work when I got it. Right now it says just a shade under 200k. The only reason I'm doubting myself is because I only hear it when in reverse and the driveshaft slop is with it connected to the front axle. So, my question is how much play should I have in my front driveshaft with it connected and how much play should I have in the differential in my front axle? Thanks dudes!
neohic Posted February 5, 2012 Author Posted February 5, 2012 Sounds like a u-joint. All the u-joints look tight without any play at the caps. Joints at the hubs look good too. That was the first thing I checked. The clunk sound also happens with a somewhat violent feel in the floor as well.
txjeeptx Posted February 5, 2012 Posted February 5, 2012 Could be a cracked transmission mount allowin the trans or exhaust crossover to slap the body when you hit it in reverse. Could be a broken engine mount too. I kept breakin engine mounts until I bought the MORE bombproof ones. Stock rubber junk bites.
maddzz1 Posted February 5, 2012 Posted February 5, 2012 Sounds like a u-joint. All the u-joints look tight without any play at the caps. Joints at the hubs look good too. That was the first thing I checked. The clunk sound also happens with a somewhat violent feel in the floor as well. The ones on my blazer looked/felt fine then one of the ears snapped off of it. Luckily, it got wedged against the yoke and the drive shaft didnt hit the ground and bounce up thru my gas tank. Mine was the rear joint and it started only clunking in reverse. You can remove the front shaft and see if it still happens. You can put it in 4wd and do the same with the rear shaft out, just make sure you tape a cup on the output shaft or all the fluid will leak out of your transfer case.
SW86 Posted February 5, 2012 Posted February 5, 2012 ^^^^ do what he says. i thought my chain crapped out and thought my ds was good. almost the whole shaft was shot. its worth the time to unbolt it and check it out.
neohic Posted February 5, 2012 Author Posted February 5, 2012 No dice. I pulled both shafts and all my joints are still tight. :(
neohic Posted February 5, 2012 Author Posted February 5, 2012 I thought about pulling the whole transfer case down then I thought, "Hey, if the chain is trash then I could probably just leave the front half of the case on the tranny and just pull off enough to get to the chain". Sure enough... I pulled off the back half of the case and chain has already worn off plenty of the case and even a large hole in the oil pickup tube filter. :shake:
neohic Posted February 5, 2012 Author Posted February 5, 2012 I found all the part numbers except for the screen filter at the end of the oil pickup tube. This thingy: I found it on Quadratec, but I need this thing by yesterday. They've got a "manufacturer's part number" but Napa can't cross reference it. Anyone know?
flint54 Posted February 5, 2012 Posted February 5, 2012 I believe the OEM part number is 4338-943, if that helps.
smuth Posted February 6, 2012 Posted February 6, 2012 http://www.4wheelers.com/jeep-np231-oil ... -2737.html
neohic Posted February 6, 2012 Author Posted February 6, 2012 http://www.4wheelers.com/jeep-np231-oil-pickup-screen-jee4338943-c-346-p-2737.html Thanks... still looking for it locally so I can put this back together as soon as I can. The problem isn't that they aren't available. I know that they are, but I'd rather not leave the truck down longer than I need to. I might've found one at an Oreilly. Need to go see it to be sure.
neohic Posted February 6, 2012 Author Posted February 6, 2012 junkyard? Thought about that too. These things really don't need to be replaced all too often anyhow. A used part would probably be just as good... have to dig inside another transfer case, but just as good. :wrench:
SW86 Posted February 7, 2012 Posted February 7, 2012 really. worst case would be finding one like yours and having to open another one. no biggie. grab it, clean it, throw it in and your good to go man :thumbsup:
neohic Posted February 9, 2012 Author Posted February 9, 2012 For the filter, I ended up really lucking out and found one at a local parts store. As for the chain, I just got done with it. Worlds of difference!
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