When I click 4hi I have a loud cluncking sound. I read that this is due to the driveshaft needing to be greased. Is there anything else I should check while I am down there. I might wait a few weeks and prevent the pump rub problem while at it.

It's probably just your servo on the front third member engaging the axles-----mine does the same thing . What you worry about is when you don't hear that noise:D

So it's normal for there to be a loud clunk when it engages?

How fast are you going when you engage?

5-10 MPH. Owners Manual says you can be going up to 55 MPH and engage though I don't.

Mine did this and the forks in the transfercase where bad and I ended up putting a new one in because the cost to fix was not to much diff.

If you are accelerating, the drivetrain is under a load. Sure the manual says you can engage at the speeds indicated, but if you lift off the go pedal when you do, it makes for a smoother shift. Give it a try and see if it helps.

I never shift when under power, or a load on the drivetrain, but I have not been in any situation where I had to.

If you are accelerating, the drivetrain is under a load. Sure the manual says you can engage at the speeds indicated, but if you lift off the go pedal when you do, it makes for a smoother shift. Give it a try and see if it helps.

I never shift when under power, or a load on the drivetrain, but I have not been in any situation where I had to.
x2 Try what he said

Will try on my way to work this morning.....thanks guys

going about 10 MPH, let off pedal so no load, LOUD CLUNK. Might be time to pull it out and take it apart.

Will be a few weeks but we shall see. Might do the pump rub issue fix while I have it out.

If you have it out, and fdo not do a pump rub fix, you are wasting a great opportunity, order the Riverside Gear plate or M/A's Pump housing, then pull the case and check it out.

Ok I was just talking to Tolli about my truck. The grease on the driveline pertains to, say you are at a red light and when you release the brake to take off there is kind of a clunk and thump (this being in 2wd) then the driveline needs greased. mine used to do the same thing. I dropped driveline and thoroughly greased the splines inside driveline where it slides into transfer case and problem solved. Dont htink it is gonna help your 4wd clunk however I just tore mine down cause I also had a loud clunk when engaging 4hi. I found the mode range fork (the big one ) damn near destroyed and my inner, middle and outer mode syncros where very worn. This will definitely cause the clunking. Also check the mode slider for wear, mine was ok. I definitely agree with Tolli on the pump rub issue. Mine showed just a little wear from the clip but I installed the riverside rub plate for 65 bucks and no more worries. The mode range fork was hard to find but found mine at Inland Truck Parts in omaha, NE for 50 bucks lol. Total for everyhting was under 200. Best of luck and hope this helps! Thanks for all your advice Tolli:)

Alright guys...tidbit sounds like he narrowed down my problem. I will be checking into this shortly. THanks guys..


tidbit...how long of a job was it?

Took me about 45 min to pull the case and about an hour to tear down and inspect everything. Not bad at all it is pretty straight foward

where can I get this Riverside rub plate from? Anyone have a phone number or website?

http://www.riversidegear.com/categories/transfer-cases-and-parts/g-m-transfer-cases-and-parts/products/product-630.html hey bro here is the link to the web page at riverside gear that has the plate . Hope iut helps ya, Jeff