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99 Ram 2500 5.9 dsl turbo 4x4 will not engage

Old Jan 16, 2025 | 03:09 PM
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Originally Posted by dodgetruck2
Somebody produces a one piece shaft to eliminated the lockout. I'm not sure if the one piece shaft from late model D60 axles is a direct swap or not. One of the first things I do personally is take the actuator off and you can flip the snap rings on the plunger and it holds the collar over all the time. Basically eliminate the CAD system. Its unreliable and annoying in my opinion, maybe save .5mpg over the life of the truck. Just make sure your front driveshaft is in top condition, as the the constant rotation will be more likely to cause problems.

Don't waste any money or time trying to replace "auto hubs" there's no such thing on these trucks, unless it has an aftermarket lockout conversion, you'll never find any type of locking hub.
You can also get an electrical switch -- from a YJ, is it? -- that'll go in place of the vacuum switch on t-case. Wire your light to that and it'll work again. Otherwise 4x4 light is always on once CAD is forced locked.

However I agree that these systems are more reliable than I'd expect. Still, they are a bit fragile and if you really THINK about it, it's amazing they work as well as they do.
 
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Old Jan 16, 2025 | 09:35 PM
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Originally Posted by HeyYou
I've never really had a problem with the cad system... It's more reliable than the thermal system GM used for a while. (yeah, lets use a heated actuator, that gets buried in snow, and disengages.... yeah, that's a good idea...... somewhere....) Granted, as they age, they require some attention, but the system on both my trucks worked perfectly once I had them straightened out.
Each there own, they have their place and serve their purpose, I just prefer to go without. I was disappointed to find on my 14 that Ram went back to using a mid axle disconnect. Though electronically shifted maybe slightly more reliable? I also greatly enjoy have the 2wd low function backing trailers with this heavy dual disc clutch.
 
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Old Jan 17, 2025 | 09:56 AM
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Originally Posted by dodgetruck2
Each there own, they have their place and serve their purpose, I just prefer to go without. I was disappointed to find on my 14 that Ram went back to using a mid axle disconnect. Though electronically shifted maybe slightly more reliable? I also greatly enjoy have the 2wd low function backing trailers with this heavy dual disc clutch.
Yeah, I suspect having the disconnect likely nets maybe 1 MPG overall..... but, it does reduce wear on the front driveshaft.... for whatever that's worth. How often do you change u-joints in the rear shaft? I think about around 280 bucks to have my front shaft rebuilt with all new u-joints and such. (on my 96... my current truck, seems to be just fine.)
 
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Old Jan 19, 2025 | 07:43 AM
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Originally Posted by HeyYou
Yeah, I suspect having the disconnect likely nets maybe 1 MPG overall..... but, it does reduce wear on the front driveshaft.... for whatever that's worth. How often do you change u-joints in the rear shaft? I think about around 280 bucks to have my front shaft rebuilt with all new u-joints and such. (on my 96... my current truck, seems to be just fine.)
I have very low concern overall for my personal driveshafts. I change the rear shaft joints when they fail. When I buy a new to me truck one of the first steps is pulling the front shaft and at least having it checked as almost no one greases the double cardan joint. If they grease their shafts at all. Yes I believe my last front shaft was around that, though fortunately they've typically been rebuildable, my last 01 with 300k+ that needed a full cardan rebuild, that got a little more pricey.
 
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Old Jan 19, 2025 | 11:06 AM
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It's absolutely true the CVs are neglected in these and THAT is the Achilles Heel. I mean it's seriously a big deal no one talks about and no one thinks about.

I WILL SAY: if your front CV should happen to fail, you really want to disengage front drive so the d/s is not forced to spin. Otherwise you crack the t-case in two and parts for the NP241D are incredibly rare. BTDT:
https://dodgeforum.com/forum/2nd-gen...carnage-2.html
 
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