Absence of vacuum causes the control to direct air to the defroster vents a safety issue I am sure. Therefore, there could be new vehicle owners that are unaware of this unique situation. I Dont have any idea where that line runs. Try this link, i found some good diagrams as well as some useful information on tracing and tracking problems. Also follow any other lines that branch off because they may go to a vacuum reservoir storage tank and a leak there will cause the same problem. Therefore, there could be new vehicle owners that are unaware of this unique situation.
I just pulled the broken piece of hose out of the boot, pulled a couple inches of good hose carefully from the firewall and threaded it back thru the boot. It would be the cheapest way to go. The ends of the fork should have plastic tabs on them, they help align the collar and provide a wear surface. Is your front actuator fine, but you don't have vacuum at the actual actuator? It does really matter what you use. Once installed, the front axles will not pull until the transfer case in engaged. The new check valve is much larger, slightly larger and longer than an old 35mm film canister.
Vacuum is what causes the diverter to direct air to the front or floor vents. Reconnect the switch to the wires. Follow it to the vacuum source looking for any breaks, cracks or leaks. . Paid attention as I just bought a 98 2500. If you have a vacuum pump, see if the rod and fork will move with vacuum applied. My Dad has the same one for his 1986 Toyota 4x4 and it has very good vacuum line diagrams.
These tabs wear down quickly and some times just disappear. I would like to add that Rams have two one way check valves, one described in the post above, and one directly off of the passenger side manifold. The affected trucks were built from July 10, 1995 through July 1, 1996. This will replace all the vacuum hoses from the engine bay upper firewall hookup, down to the transfer case, and then has 2 lines going out to connect to the steel lines near the transfer case, that run up to the vacuum actuator. Acceleration can also have an effect on the doors for the same reason. Now move the shift clip on the actuator shaft so that is holds the shift collar in the locked position- I believe it is the end groove for Dodges.
How that works is vacuum from engine is routed to the switch on the transfer case. I would check that, this has not happened to me. If you need to pass another emissions test, you might want to disconnect them again before the test or spend the thousands of dollars replacing parts trying to get the truck to pass. The downside is that there are vacuum lines that can be damaged off-highway, causing the front axle to disengage as well as adding more moving parts to fail. Anyway, thanks again for all the help! This will replace all the vacuum hoses from the engine bay hookup, down to the transfer case, and then has 2 lines going out to connect to the steel lines near the transfer case, that run up to the vacuum actuator.
Make sure the vacuum lines have not come unplugged and that the wires aren't damaged. By connecting them together you create a path to ground for the light. I think you look around the front axel? You can cut into the line anywhere and splice it back together with a piece of vacuum hose. If it is part of the vacuum system it is covered for 7 years unlimited mileage. Good luck I hope this helps. Now for the other-than-original owners: check with your dealer to see if the recall was completed and when. If you know someone with the same car as yours you can copy the setup! If not, you are dismissed as well.
The valve is found under the hood, near the firewall on the passenger side. I checked all the valves and they were fine, but all the suddon I pulled the hose going in the fire wall out and it had been melted in half. The torque converter must engage and slide into the front pump. There should not be more than approx. The return lines also run in this same area. I just had to suffer through the drive up and it finally went in to four wheel drive just before I got there! Take each valve off and blow on each opening of the valve, air should flow through only one opening i. Since the two right shafts aren't connected, the right wheel is free to turn independently of the left.
Also the switch motor bolts to the axle housing with four bolts. This helps to improve fuel economy over non-disconnecting axles, and also allows true shift-on-the-fly engagement of 4wd. When the front axle is locked, you can disengage the passenger side in order to make turns without wheel hop. Engagement does not occur until the splines on the shaft lines up with the ones on the sleeve. Having issues with your 4 wheel drive engaging only when it wants to? Hey guys I had the same with air only coming out of defrost. If there is no reservoir,then look for a vacuum check valve near the firewall,passengers side under windsheild. I havent taken the truck out of 4x4 yet because I am afraid its not going back in! I have taken an air hose and forced the actuator to shift in a pinch how ever you will need to replace that actuator.