So I have a question for you all. I just installed my SYE yesterday in my np231 transfercase. I replaced a lot of parts while I had the t-case out of the Jeep. I replaced a broken shift mode fork, new pads on the range fork, new chain, new front/rear/input seals and new seal on the transmission output as well. Put 2 quarts of fresh ATF4 in there as well once completed.
Since I did the install I drove over to the local driveshaft shop to have a new cv rear driveshaft made for my Jeep. The mechanic there crawled under the jeep to take measurements and noticed some extreme heat coming from the transfercase. He grabbed the yoke to try to turn it and let go immediately. He said it shouldnt be that hot and something seemed wrong. He wasn't 100% sure but to his knowledge he thought he should be able to grab the yoke but couldnt.
He was thinking the oil pump wasn't hooked up properly or it fill off when we put the t-case back together. Could this be possible? I never really checked the temps or felt the t-case when it was stock (i've only had the jeep for 1.5 months) so i dont know how it was before the SYE install. Could it get extra hot because the driveshaft is not connected to it so it's freely moving vs having to move 2 wheels?
I have a laser temp checker and I checked the t-case temps when I got home and they were about 140-150 on the rear case half and then on the new yoke/case from the SYE we installed the temps were anywhere from 150-170 and the yoke itself was about 130. This was after driving down the freeway for about 15 miles.
I really dont feel like splitting the t-case open again just to see if the oil pump line is properly hooked up if I dont have to. Could you please chime in with your temps and if this is normal? I also dont want the t-case to grenade on me this weekend when I go wheeling. I will have my new cv rear driveshaft today. Should I install that and then go for a drive and check temps to see if they have cooled down? I live in Arizona and the current ambient temp today is about 65 outside.
Thanks and any feedback is appreciated as to what to do.