T-14 and D18 oiliing....

[Project71-5]

I know that the 14 and 18 have common holes between them which allows them to share oil. However as I was creeping up my driveway yesterday in 4wd I noticed that it became difficult to shift. It began to act like it did when I was unaware that the tranny and transfer case shared, hence I didn't have them filled all the way up.

So what stops all the oil from pooling in the transfer case on steep long hills, thus making it difficult to shift? Vice versa for the oil going to the tranny on long descents. Has anyone blocked these passages to prevent this or is it something to live with until I get an SM420 :twisted:

[69CJ]

Hi Joe:

These was a pretty good thread on the old board that discussed just this. I don't recall anyone saying they actually plugged these holes. While a long incline may cause some of the gear oil to travel backwards, I'm not sure that means all of it would or even could. One interesting question that never got answered on the other thread was whether the main shaft was acting somewhat as a pickup or pump, helping to move the oil from one box to another.

Perhaps it's just the design of the times - I don't really know. But you'll surely improve upon it once you get that 420 in there. :mrgreen:

[SULLY]

I dont` know too much on the subject , but have heard a couple different things about attempting to improve on the problem. One was from a guy who drilled a hole between the too, down lower on the cases ,to help keep the levels even. Because the fluid flows back to the transfercase and tends to get trapped, and the slow return can possibly dammage the needy transmition. Here`s two, in talking to AA they told me when I bought a large hole to small hole adapter ,that it was a good idea to buy there bearring one of the reasons was that it was a sealed bearring and it would eliminate the fuid problem.

[4x4chevette]

Ive always just ran one quart over in any auto that was used on steep inclines such as rock crawling and trail riding.