This question involves an 87 f250 transfer case though my truck is:

86 f250 c6 auto 4x4 diesel.

I've got a gearvendors overdrive system that is broken. I want to remove the whole thing and swap out my auto for a ZF manual. I went to the junk yard and found a good price on an 87 zf transmission with the transfer case and all accessories. But when I pulled off the t-case water came pouring out of it, and not just a little. The guy tried to tell me that it was no big deal, but I cannot believe water on the gears for however many weeks/months it was sitting there is not a big deal. Can anyone confirm that the t-case would be no good, or could I still possibly use it? I wouldn't even consider it if I had another available for the price I'm getting this one for.

The reason I need that transfer case is because mine was altered when the original owner had the gearvenders put in. They removed the tail housing from the back of the tcase (the cone-like end part) and put their own device in place. I don't suppose I could/should take the tail housing off the 87 tcase and put it on mine? By the way the 2 tcases are not the same so I'm not sure I should even try to use my 86 tcase with the 87 tranny. Not sure what to do, I can't find a tcase to match the tranny for close to as cheap as I'm getting it, but I guess I don't have any options but to look for something else.

 

I'd check all the bearings .If they look bad replace as needed flush out pump screen and pump If everything looks good put new fluid in and go

 

Transfercases are about $100 used. I probably wouldn't even take a chance with the one filled with water.

I'm pretty sure that your speedometer is also gear driven through the transfer case. Make sure the one you get has the hole for that gear.

 

those gearvendor units sholuld have a lifetime warranty and are rated for 2000 hp and double the torque, id get it replaced

 

They do not have a lifetime warranty, and it is $1000 to have it fixed from gearvendors. And nobody (transmission shops) can fix it without gearvendor parts which they cannot get. I paid $2000 for the truck so fixing the gearvendors is not an option.

 

I forgot to ask, does the transfer case have to come from a f250 diesel? I found an 88 f150 gas tcase that I can get for free, would that work?