BW 1339 Emergency Drive Vacum Hose/Dial assembly

[barillms]

I swapped in a TH 400 and BW 1339 w/low range into my '81 Cherokee along with Dana 44s front and rear etc.. OK. I had a garage do the tranny/T.C. swap out of a "parts" '79 Wagoneer. They did the swap, but didn't take the Emergency Drvie activation assembly (glove box dial, and whatever else is attached to it) out of the old parts wagon.
Is there an open hole in the top of my BW 1339 where the vacum hose is supposed to go? What can I do to avoid any future problems?
Can I get a new assembly and hook it up myself, if so, where? How does this Emergency Drive work exactly? This is strictly a woods Jeep. Any help would be very very great! Thanks, IFSJA member.

[J4GRAND]

I've got an extra e-drive switch in my box o' parts. Yours for $10 shipped.

[BIGYELLOW78J10]

So long as nothing was destroyed in the transfer, you should be able to hook everything right up, provided you get the switch and hoses from the parts rig. But, unless you switched the dash or wired in the indicator light, you'll have no way to know what mode you are in. The 1339 is a full time transfer case. While in mormal mode, the transfer case works like a limited-slip differential, transferring power in differing amounts to wherever it is needed. When the vacuum switch is activated, a shifter is moved and the transfer case is in emergency mode. In E-drive the front and rear shafts are spun at the same rate, as in many conventional 4wd cases. This works fine off road, but on road leads to difficulty turning, wheel chirp and failure. THE QUADRATRAC SHOULD NOT BE DRIVEN ON FULL TRACTION SURFACES, LIKE A ROAD, IN E-DRIVE. So, I'd suggest finding the hoses, dial-switch, and wiring in an indicator light off the existing switch in the QT unit. Alternately, you can make a manual shift unit. Search for QT and porkchop. Or if you never think you'll nee one of the modes, you can just leave it. You could also make a very rudimentary "switch" by running one manifold vac source and a vac hose to each port on the actuator located on the right side of the Q-trac. By swith the vacuum I think you should be able to switch modes, since that is all the switch does anyway. But you still need to know what mode you are currently in. If I were you I would get in touch with the garage. I feel the switch should have been included. But i guess it all depends on what you paid and how well you know the folks. Good Luck and keep asking questions.

Daniel Toon

[Bob Barry]

I've recently re-hooked my vacuum-selector up; it was pretty easy to figure out when I was in E-drive, since it would bind up in corners. I actually had the vacuum-lines hooked up wrong (it's just two 3/16" lines), so that the TC was in E-drive when the selector was in normal, so I just swapped the vacuum lines and everything is peachy-keen.