I posted this in the 911 help forum but i really need to figure out this problem by noon today. The problem is on my 98 when turning it fells like something is grinding( kind of feels like a goose neck in a bind. Or in 4wd without a limited slip) its only when turning the slower you go the worse it seems to be. It is also there in neutral but not nearly as bad as in drive. and i can still feel a little bit with the t case in neutral. Don't know about backing up haven't tried it yet. I posted this in the 2nd gen drive train and some people said try the friction modifier well it was starting to get pretty bad so today i added it...if anything it made it worse. Im leaving tomorrow at 4:00 i get off at noon so i have till noon to figure out the problem and till 4:00 to fix it after that were heading out for a trip and going about 700 milesround trip. If its something fixable id like to before it can cause more damage.

The diff did look a little low when i added the modifier. I may go to the parts store after work and add some just for the sake of it being full. Anyone know what type of fluid i need for it? Im also going to check the T-case tomorrow to see if its low. I dont think its the trans because i would think it would be doing it all the time not just when i turn.

when i drove to work this morning there was no vibration. Any ideas?

Chris

 

I've seen this before when I worked on ford pickups. If you do alot of straight driving the lube and friction modifier get thrown out of the clutch packs and they start to stick and chatter. Try checking the fluid level,top it off if you need to, then go to a parking lot and drive the truck in a figure 8, 6 or 8 times, this will work the oil back into the clutches, you should feel the chattering start to go away.

 

i would check front Axel where they meet the rotors, they are like CV joints but same principle they have pin bareings like U joints and when they go that will happen