Well, today while driving the snowy pass in 4 hi, my T case just popped into neutral. I pulled over got it back into 4 hi but now she makes a nasty noise! Goes away when in 2bi. The chain aint broke (yet) cause the front wheels still get traction. May have something to do with the shifting fork but not sure. Any ideas what im up against? Thanks.
e4od in a 91 f250 haven't crawled under yet because it's dark and in lots of snow so, not certain which T case I have. 1356 maybe?

Justin

 

probably a 1356 case, and probably the pump let loose and the t-case is getting ready to self destruct due to lack of lubrication.
common issue with the 1356 t-case.

 

Damage done you think? I get the feeling (by listening to it) that just replacing the pump and changing the oil isn't gonna fix it ...

 

yup. normally when the pump goes the case is pretty well toast.

 

Yeah, thought so. Ok, To the junk yard I go!
Thanks Tom

 

Car-Part.com--Used Auto Parts Market
this will save you a lot of driving

 

Well, that's handy! Thanks!

 

yup, that site has saved me hundreds of dollars in diesel fuel in the parts search department.

 

Found one in Prosser. About an hour and a half from me. $200 slip yoke rear with manual shift.

 

Manual or auto hubs?

 

Manual warn hubs

 

Just to confirm it's the t-case and not something "downstream", try unlocking the hubs and driving in 4HI. If it still makes noise, then it's most likely the t-case. If no noise while unlocked, you may have an issue with the hubs themselves. Also make sure the front driveshaft and axle shafts turn freely by hand while in 2HI with the hubs unlocked.

 

Yeah, those are the first things i checked. I wish it was just a hub issue