Help anyone???

 

Dude, get it done correctly. See pro to at least get it diagnosed. Autozone can read the codes for you. Rednecking it by removing parts is not a good idea for multiple reasons. Some mentioned above.

 

I'll bet the wear clip has broken, all the fluid is gone and it's something in the transfer case jumping. That's what a couple of my buddies trucks have done. I think it was the shift fork was worn away enough that it let the transfer case disengage enough that it sound like something was happening, but you couldn't tell what.

 

I did an oil change to differential but not the transfer case how do i do the oil change to transfer case is it the same as tranny?

 

unbolt drain hole and fill hole, drain fluid, tighten drain bolt and fill with fluid about 2 quarts.

 

If it has any fluid in it. If not it will have a hole some where. Common issue.

 

Transfer case is junk order a new one and call it a day. Been there many many times with these trucks. 99's were especially troublesome. We sold 3-5 a week for the early trucks until the last few years when they have started to thin out a bit.

 

Interesting...im pushing close to 1xxx ft/lbs of torque through a stock 99 tcase with 230k on it...

 

The problem is a little clip inside the trans breaks and wears a hole in the case causing all the fluid to go bye bye and kill the transfer case. A redesigned clip fixes the issue before it fails.

 

Stator of oil pump that used to be held very well with sealant at the joint rattles its way through the case on the newer 99 up units with 1 pc rear section. Not a horsepower thing but a mileage/internal vibration issue at the pump. Your tailshaft will be soaked with oil and there will be a very small pinhole if you have this issue. I have a takeout 67,000 mile t-case for a 99 in the mass parts forum if anyone is interested, located in WI.