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12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

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  #1  
Old 01-25-2009, 11:00 PM
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Default 48RE in 12v?

Can I put a 48RE in my 1998.4 12v? I have a 2005 48RE and converter that worked great when i took it out just sitting on my shop floor free to me. The reason i ask is this is my second 12v truck that has no idea whats going on when it comes to shifting. Ive tried everything replaced all electronics, put in shift kits, adjusted/replaced tps, messed with the TV to no avail still shifts way-way!!!! to early 1-2 at 12mph 2-3 at 20mph 3-4 at 27mph lock up at 40mph and i just cant take it any more i have to downshift manually just to speed up in traffic. I sold my last 12v truck a few years back cause i got so aggravated about the same thing. I plow snow and it stinks manually shifting the stupid thing all day long. This truck has a #100 fuel plate in stock position, no cat-muffler, and a 3k GSK not trying to make a hot rod just improve drivability.
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  #2  
Old 02-03-2009, 09:32 AM
wildbill's Avatar
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Bout the only thing you need is the x-over plate to go from the transmission the engine. Might need drive lines to.

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  #3  
Old 02-03-2009, 09:10 PM
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I know you can just not sure how.
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  #4  
Old 02-03-2009, 09:41 PM
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Theres a way to remove the TPS and replace it with another electronic item that is adjustable for where it shifts. I'm trying to find the article now.

Found it; Replace TPS with a potentiometer. http://www.dieseltruckresource.com/d...&highlight=POT

Racer9's Sig:'96 Ram, 4X4, flatbed, ThurenFab trackbar, 1 ton wheel cylinders, DSS, HD steering.
Motor; #100 plate, TPD 4k GSK, 306hp/743tq.
Exhaust; Schwitzer S300G, 4" downpipe into 5" turnout stacks.
Trans; Intelligent Engineering billet input shaft, Dunrite VB and single disc TC.
The "Toy". '81 Ram 2wd, 4BTA. Now moving under own power! 165hp/488tq!

Last edited by Racer9; 02-03-2009 at 09:58 PM..
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  #5  
Old 02-04-2009, 12:28 AM
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I actually already have a pot for a tps and a new factory tps selectable on the dash via a 3p2t switch only thing it affects on my truck is lockup speed so i usually have it switched over to the stock tps. Now im thinking of taking the guts out of the 48re and O/D unit and sticking it in my 47re case and just buying a good valve body but Id be nice to just stick the 48re right in not making a ton of power and i have a 53 block so i dont really want to push it any how.
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  #6  
Old 02-04-2009, 03:10 AM
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golly, if my trans shifted like yours i'd be happy. mine will go 1-2 at 5mph or less, 2-3 at 10mph. tc will lock as low as 25 in 3rd, and around 35 in o/d. the gears will hold a little longer with around 50% throttle or better. like you i have tried the electronics in trans, tp, messed with t/v cable. it seems to me it might be gov pressure high maybe idk. all shifts are solid feeling, and no slipping. i hate it and have not been able to get any good advise.

jnicewan's Sig:'98 12v, 4x4, swb, quad cab, auto, bd valve body and tc, 4" straight pipe. bd exh brake, banks boost, pyro, trans. afc mods, bought with some banks stuff? waste gate can, fuel plate etc... BHAF. 105k miles and counting
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  #7  
Old 02-04-2009, 08:22 AM
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Originally Posted by jnicewan View Post
golly, if my trans shifted like yours i'd be happy. mine will go 1-2 at 5mph or less, 2-3 at 10mph. tc will lock as low as 25 in 3rd, and around 35 in o/d. the gears will hold a little longer with around 50% throttle or better. like you i have tried the electronics in trans, tp, messed with t/v cable. it seems to me it might be gov pressure high maybe idk. all shifts are solid feeling, and no slipping. i hate it and have not been able to get any good advise.
I see you have a BD valve body, have you contacted them about your problems?
When I did the Transgo kit I had that problem too, but the directions had a "fix" for it. Basically you turn the TV screw, in or out, I can't remember which, to adjust it. You have to drop the pan to do it.
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  #8  
Old 02-04-2009, 09:24 PM
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contacted BD and from what they said i think it stands for big dummy. they offered no advise and didnt have any usefull diag for me. i ordered a re-usable pan gasket because its the 3rd time in 1 month the pan has been off. when im in there i will check/adjust the tv screw and also might try line pressure adjustment too. my line pressure was in spec but maybe i need more???
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  #9  
Old 02-05-2009, 01:23 AM
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Yeah the only reason mine even shifts that high is cause i have the tv cable as tight as it will go. that screw is the throttle pressure adjustment next to the line pressure adjustment screw havent messed with that yet my line pressure was at 65 at idle witch is in spec for the trans go kit but it feels like it needs more.
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