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Discussion Starter · #1 ·
I have a 2000 dodge ram 1500 with a 5.9 out of a 94 3500 conversion van. I just put it in last night. Problem one 4 wheel drive wont kick in the light on the dash wont come on at all now but the front drive shaft will lock in and the axle won't. Problem 2 is I have a code P0171 which is running lean in bank 1 which I can't figure out why it is doing that neither and I can't figure out the 4x4 issue which I am assuming vacuum but I can't find a leak I sprayed carb cleaner and used propane and no difference. Now I have a grinding noise from where the torque converter bolts to the motor which I am assuming the torque converter is going since the truck once in a while stalls and doesn't down shift but starts right up. Please help me I was suppose to go to mass tomorrow to help my grandparents and now I can't please help......
 

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If you pull the hoses off the axle vacuum motor, you should be able to tell if you have vacuum available for the motor to operate. Make sure the lines didn't get disconnected or switched around during re-assembly of your truck. Also ensure you have vacuum at the post on the engine that you connected to.

As for the P0171....check the O2 sensors. Did you replace any? How about the MAP sensor...is it the 2000 one, or the 94 one ??

Which torque convertor did you install?
 

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EEEWww, Hope that torque converter didn't slide forward, did you have to draw it up to the flex plate, or was it jammed up against it? (front pump damage) 2.Definately lack of vacuum to the axle disconnect. probably that worthless pair of connections on the drivers side front of the tranny crossmember. 3. I'm guessing a smashed upstream o2 sensor, (been there) made mine run rich, VERY rich.A vac leak may also cause you to run lean, but I always get a #8 cyl misfire code with vac leaks.
 

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Discussion Starter · #4 ·
I am using the torque converter from the 2000 and i swapped everything over so I still have the same comp. So I also switched out the flywheels from the 94 motor back to the 2000 to match up to the torque converter.
 

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Screamintrashcan brought a good point. When you bolted it all together, did you have to pull the TC forward to the flex plate, or did you have trouble getting everything to mate up and pulled it together with the bell housing bolts?
 

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Discussion Starter · #6 ·
It moved 1/8th of and inch but it all comes down to the fact now that I am at a lost and took it to a mechanic for the first time in my life which I am very depressed about but I guess it had to be done this sucks..
 

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1/8 of an inch is good. It's when there is no movement that there is an underlying problem with alignment.

Keep us posted as to what the out come is.
 

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Discussion Starter · #8 ·
could it be the 4 wheel driver actuator that is making my issue by running lean and not locking the the front axle in for the 4 wheel drive by the blatter drying up and leaking inside causing an internal leak that you wouldnt be able to find from spraying anything to get the engine to rev up when you use propane, starting fluid, or carb cleaning like it should if there was an external leak???
 

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I have to agree with that scenario being a good possibility. :)
 

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Discussion Starter · #10 ·
Well I replaced the actuator and it will go into 4wd only when I rev the truck up to 2k or more which I believe is a vacuum leak where the vacuum line that goes into the cab broke and I connected it together with a rubber hose with a little bit smaller of an inside diameter than the outside diameter of the vacuum line that broke. I am hoping that it is the only issue left for the vacuum system besides the torque converter needing to be replaced and the trans band being tightened up. Any input on if that quick fix on the vacuum line could be the cause of my issues.
 

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I'd replace the vacuum line. If it broke once, it's likely in poor overall condition and could have a bunch of restrictions and/or leaks down it's entire length. :4-dontknow:
 
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