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

blew the tranny

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  #11  
Old 09-06-2010, 12:45 PM
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Originally Posted by DirtyDozen
I have to pass on a warning: If you do pull it apart on your own(and havent dealt with the internals of the 518 before) DO NOT attempt to disassemble the overdrive housing(rear section of the unit) without finding direction on the proper procedure-you need an arbor press to do this safely- the direct spring in there has somewhat of the same potential as the app. spring in a big rig style brake pot, it is bound up in there under somewhere around 1000psi of tension, only a snap ring holding it in there, it'll kill ya if your standing in its way when it comes out
DirtyDozen is very correct in that the overdrive spring can take your blame head off! There are a couple of ways to address the issue with the overdrive section that DirtyDozen refers to.

1- One can get a cage that works with an arbor press (like DirtyDozen speaks of). Placing the OD section in the press with the cage on top allows one to compress the big spring safely while removing the retainer C-rings.

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One can also get a cage that has it's own mounting bracket and allows one to compress the big spring without an arbor press.

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Either way, once the spring is compressed, one simply has to remove the two C-rings to allow full disassembly.

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Lifting the clutch-packs out of the way exposes the overdrive spring.

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NOTE: Prior to reassembly, one will need to align the splines of the clutch-packs and overdrive planetary so as to allow the completed assembly to slide back onto the intermediate shaft. One can use the existing intermediate shaft (if your trans is fully taken apart) or use the tool that comes with the arbor type cage.

BE CAREFUL!
 
  #12  
Old 09-21-2010, 10:56 AM
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ok i've busy but now i'm getting to every one. the guy that said i have a 700r4, first its a dodge and that tranny is for chevy, and they r JUNK. but i stripped the planitary gear and broke the aluminum housing for that broke in two, more or less every thing broke. ok for the fix i got a steel 5 gear planitary, and a 6 gear, billet HD torque converter, borg warner and ray besto clutches, and everything swapped to a second gen 618 tranny. million times better in driving quality and shifting. 2400$
 
  #13  
Old 09-21-2010, 04:23 PM
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you'll be happier with the 618. I had a 1st. gen '93 with the 518, basicly they are a 727 with a forth gear added. I had mine rebuilt 3 times before I got smart and did it right. I kept blowing my forth gear out, finally I spent a bunch of $$$ and picked up a complete rebuild kit from DTS with kevlar frictions and a better torque converter. mine kept burning the overdrive section. I had my tranny completly rebuilt by a good reputable shop I think I was into it about 3k for everything... my motor was warmed up alittle bit with a Banks power pak kit, larger injectors,a haleset turbo, a reworked rotary injection pump advanaced about 1.75 deg. and a straight 4" pipe out the back. this thing would cook... unfortunatly it would cook my overdrive up. I was not towing any heavy loads maybe 10k at the most. those first gens had very few problems but they did eat trannys alot. I finally sold it and bought a ford 6.0... oooooh well now I have a different set of issues. GOOD LUCK.
 
  #14  
Old 09-23-2010, 01:38 PM
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Originally Posted by Randall
ok i've busy but now i'm getting to every one. the guy that said i have a 700r4, first its a dodge and that tranny is for chevy, and they r JUNK. but i stripped the planitary gear and broke the aluminum housing for that broke in two, more or less every thing broke. ok for the fix i got a steel 5 gear planitary, and a 6 gear, billet HD torque converter, borg warner and ray besto clutches, and everything swapped to a second gen 618 tranny. million times better in driving quality and shifting. 2400$
Who makes that torque converter? LIke what's the brand name?
 
  #15  
Old 09-24-2010, 07:53 AM
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Glad you got it going...
 
  #16  
Old 09-24-2010, 01:34 PM
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Originally Posted by crossy's son
Who makes that torque converter? LIke what's the brand name?
not sure of the name brand.
 
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