Do we have any QT experts in the room?
I just rebuild me engine, put it back in and got it running, but now the Jeep won't drive.
I can hear the big 'clonk' as she goes into R or Low 1. I checked the vacuum lines and found the rubber had split and snapped off by the control mechanism on the transfer case.
I put new hoses on and can feel vacuum, but she won't lock and drive. Two weeks ago when I was driving her, I had no problems.
Could the diaphram have gone all of a sudden?
I have a 76 Chief as a spares car which also has a QT, however I notice that there are only two vacuum lines at the transfer case end, where my 78 has three. The third runs to another vacuum source on the manifold, in addition to the glove box switch vacuum source.
Is this normal does anyone know?
Also has anyone tried and tested a mechanical switch. I don't mind crawling under the car to lock the transfer case - I would much rather that, than be at the mercy of some vacuum pipe and a diaphram in the middle of nowwhere, 100 miles from water!
I have checked, http://jubileejeeps.org/quadratrac/index.htm
but that does not answer all my questions, very good as it is though.
Thank you in anticipation.