RT help needed on Tcase problem (1 Viewer)

[Izeloz]

My Tcase went out a few months ago and i finally pulled the trigger on a salvage replacement. Job seemed simple enough to do myself, felt like everything lined up perfectly and didnt anticipate any issues. However once i got everything put together i have no power and gears are grinding going from drive to park ect. Feels like the splines from the T case to the transmission are not properly engaged or something. I double checked that my Tcase shifter was properly engaged and that all the electrical connections were re-connected ect. If you guys could please let me know if i missed some crucial step i would be very appreciative! there are two things i noticed while installing that i'm a bit concerned could be related to the problem in some way. 1- when i separated the old T-case from the transmissions there was some fluid the poured out. I would have assumed the seal was bad on the transmission except it appeared to be gear oil, and the seal looked great. i assumed this was related to my old Tcase failing. 2nd the shift actuator on the new Tcase was full of oil and it was leaking from the electrical plug. I knew that the seals on these actuators often go bad so i simply replaced the seals and moved on. Wondering if the actuator on my new Tcase could be bad? Thank you for any advice.

 

[Adventurelife]

Most likely cause of this problem is the coupler between the trans and the T-case.
It's easy to crack when pulling a t-case, but it's not always visible without a close inspection, but when the shafts turn they have enough force to open up that crack and let the shafts spin. Causing the exact grinding you are describing.