Engine/Transmission (1998.5 - 2002) broke u-joints? and my truck smells like fuel after i shut it off

[JMachemer]

I think i have a u -joint problem in my front drive shaft. It drives fine in 2wd and when coasting in 4wd, but when i accelerate or am pulling a hill i get a vibration in the front. I am almost 100 % certain its a u-joint. Could i be wrong? Are the u-joints with grease zirks the best? I have heard both non-zirked and zirked stories. I figured the ones with the zirks are the best since all the Peterbuilts got em' . Anyone know if NAPA has them?



Also i get a strong scent of diesel fuel in my garage when i park my truck. It has been a year since i got the FASS and almost 6 months since i got my new injector pump. I haven't had any work done since the new VP was put on - and taken back to the dealer for a leaking injector line the day after. I checked the line from the tank to the FASS to the injector pump and they are clean and dry. I don't see any wet spots or greasy spots around the engine either, and the concrete is clean too. I am not sure where i should be checking next. The truck starts and runs fine - still makes black air .

 

[JFaughn]

Put the ft. end up on jack stands and wiggle everything you can get your hands on , wheel side to side , top to bottom, reach for the u-joint in the axial just behind the wheel , then the ft. driveshaft[3 u-joints] and the yoke at both ends sometimes they'll come lose , when it comes to the joints I've under the impression that the spicers are the best , napa can get but may not stock, zirks can go either way. fuel leak also check the top of the tank , I think there was a TSB for the lines and the metal rusts through.

 

[CSnyder]

That front end vibration you are feeling while under torque is most likely the front driveshaft but it may not be the u-joints... . there is also a small ball socket joint in between the rear u-joints by the transfer case... our local Napa stocks them and replaces them at least once a week in a truck for my local Dodge dealer. I did my own last week and it's a real pita!



Chris