1st Generation Dodge Cummins 89-93 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with Rotary Injection Pumps

vacuum 4x4 motor

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Old 01-05-2010, 09:20 PM
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Default vacuum 4x4 motor

Ok heres a ? on my 4x4 shift fork.when engaging into 4wheel does it pull the collar toward the tire to engage the outer shaft,or does it pull in over the inner shaft?my 4x4 indicator doesnt work and i dont haver the truck at my house so im just wondering,because its not engaging.
 
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Old 01-05-2010, 09:30 PM
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ummm first gens have manual hubs buddy. no slip collar
 
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Old 01-06-2010, 05:04 AM
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Your kidding.my 85 has manual hubs retrofitted and the vacuum engage 4x4.Ive seen it referred here as the CAD system
 

Last edited by stillcummin; 01-06-2010 at 05:07 AM.
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Old 01-06-2010, 04:13 PM
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really! i got a three friends with these trucks an we all have lock outs, so i stand corrected
 
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Old 01-06-2010, 04:40 PM
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Originally Posted by seandonato73
really! i got a three friends with these trucks an we all have lock outs, so i stand corrected
X2 All the ones that I worked on when i was wrenchin from what i remember (that was 6yrs ago) was the man lock outs Im not sure
 
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Old 01-06-2010, 04:44 PM
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well look at it like this i have a 90, zach has a 91, steve has a 89 and a 92, and one of the guys i work with has a 93, so i got all the first gen years covered between me and the guys i know... now all of them are w250's the 89 is auto an the rest are stick. all of them have lock out hubs. but thats only five trucks, and other then that i haven't really seen any around my area.
 
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Old 01-06-2010, 05:27 PM
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im trying to figure a way to lock this thing and use the hubs.i might tack weld a collar on the shaft of the rod extended
 
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Old 01-06-2010, 05:50 PM
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my buddys jeep has that... we just made a space for either side of the shift fork to keep the coller in place... works really well. what axle is in the front of your truck, you may be able to get a solid axle out of a junk yard, that would eliminate the week split axle.
 
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Old 01-06-2010, 07:12 PM
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Ill bet he has a dana 44,look where it sez "my diesel"on the upper right.It say's "85 Ram Prospector"! The 1/2 and 3/4 ton trucks used a vacuum disconect I believe from 85 on, my 84 Ramcharger has auto hubs. You could get a housing out of any 80-84 pu or rc,I think the 74 to 79 housing will work also. 1/2 and 3/4 ton housings are the same. You will also need the drivers side axle shaft. Or just swap in a dana 60 THAT'S what I'd do.
 

Last edited by 440warwagon; 01-07-2010 at 06:16 PM. Reason: another mistake!
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Old 01-06-2010, 08:44 PM
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Originally Posted by 440warwagon
Ill bet he has a dana 44,look where it sez "my diesel"on the upper right.It say's "85 Ram Prospector"! The 1/2 and 3/4 ton trucks used a vacuum disconect I believe from 85 on, my 84 Ramcharger has auto hubs. You could get a housing out of any 80-84 pu or rc,I think the 74 to 79 housing will work also. 1/2 and 3/4 ton housings are the same. You will also need the passenger side axle shaft. Or just swap in a dana 60 THAT'S what I'd do.
so what housings are you talking about?Im trying to delete the vacuum shift fork so why would i use a different housing with the same thing

---AutoMerged DoublePost---

Originally Posted by seandonato73
my buddys jeep has that... we just made a space for either side of the shift fork to keep the coller in place... works really well. what axle is in the front of your truck, you may be able to get a solid axle out of a junk yard, that would eliminate the week split axle.
what do you mean by "space"?
 

Last edited by stillcummin; 01-06-2010 at 08:45 PM. Reason: Automerged Doublepost


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