t- case chain

[blingcoln]

I am getting a clunk when in 4wd high or low. The front end is all good, new superwinch hubs that both lock. When the front end binds up, it makes a clunk. I pulled the t-case apart and the chain has about 3/4" of slack with the case halves almost together using a screwdriver to push on the chain. How much slack should the chain have? 99 ps with 4.30's, 37's auto, 273 case, lots of motor mods. Thanks

[NoRalPh]

I'm afraid I don't have a definitive answer for you but, I'm trying to picture this in my head,,,

You poke a screwdriver through the case halves and get a total of 3/4" movement? That is, it moves 3/8" up and 3/8" down from what would be a straight line between the chain sprockets?

That doesn't sound like too much to me....

[blingcoln]

I get 3/4" of movement in when I push on the chain. The case halves have to be close enough together so that the bearings on the rear half of the case support the main shaft and the front output shaft or else you can move the main shaft side to side, so I can only push the chain in(towards the middle of the case and I get about 3/4" of slack.

[NoRalPh]

OK but, you do see where what it is you're talking about is really 3/8" movement from center -right?

Lets say the chain was "sagging" from it's own weight and is down from taught (I don't think they are actually supposed to be "taught") the first 3/8" it moves just brings it back to the center and the next 3/8" is the actual deflection from that center....

I still think a total of 3/4" is acceptable, I've had mine apart I just don't recall how much the chain moved. Maybe someone with more recent experience will add to this

[blingcoln]

with the caes laying horizontal on the bench, I can move it 3/4" so if I could hook the chain, I could probably pull it 3/4" also