Hello, the probem with my 99 ram 4x4 is this, truck will not engage into 4 high, I tried it in 4 low and I can pretty much tell that it is going into 4 low, although there is NO indicator light coming on either way. I have 1 vacuum hose coming from the CAD to a free hanging end with a plastic nipple on the end, surprised this isnt connected to anything. What do you guys think the problem could be as its not going into 4 high and no light?

 

Well sounds like your vacuum disconnect is toast. Time to order a new one! Common problem on the rams.

 

Where is that located? You mean the piece at the end of the hose? Sorry but Im not familiar with that.

 

The switch is located on top of the t-case.

Josh

 

You might want to read through this thread and do a search for others. Very common problem with these trucks.

https://dodgeforum.com/forum/2nd-gen...078-no-x4.html

 

Thanks, I did more checking and found some very brittle vacuum lines so Ill start with that, have about 4 hours before the blizzard arrives here in rhode island so Im gonna try to beat the clock, again thanks for the help guys.

 

get the posi-lok.....

 

My Ram will go into 4hi easy but won't shift over to 4lo

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Check your linkage.

Josh