Transmission swap or beef up - Dodge Cummins Diesel Forum
94-98 Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect...NO ADVERTISING

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post #1 of 15 (permalink) Old 10-07-2019, 10:06 PM Thread Starter
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Transmission swap or beef up

I got a 94 2500 4x4 with auto is it possible to put a 3rd gen 6sp in it? Or what should I do to beef up the transmission to be dependable pulling truck I haul skid steer and hay tractors and equipment I normally use my 06 with 6sp to do the heavy hauling but it is in shop with a large repair bill my 94 has had a transmission rebuilt back to stock specs would it hold up to a 32 ft trailer with a skid steer load for less than 20 mile trips? Might be easier to just fix the 06 and use the 94 for just feeding and light loads

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post #2 of 15 (permalink) Old 10-08-2019, 10:53 AM
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Yes but you wont be able to pass anyone. Ive been pulling 8-10k, with the occasional 14k trailer with 160 hp and 47rh auto.

I have about 270k on my truck and i have no idea if its been rebuilt or not.

It does fine, slow and steady just get a good trans temp gauge.

Daily driver/ workhorse: 1994 2500SLT 4x4 Auto. Hewitt EGT, Boost, Trans gauges, Under hood Mech FP gauge, Trident fuel lines, Tork Tek OFV, Mag-Hytec DD Transmission Pan, Ford manual hub conversion, Diamond eye 4" turbo back, 37337 Upgrade. 260K

98 2500slt 4x4 ECLB moldy G56, south bend clutch 3rd gen trac bar , boxed control arms, billet tappet cover w/ dual breathers trident fuel lines, Tork Tek OFV, 4' stainless side dump with muffler 240k
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post #3 of 15 (permalink) Old 10-08-2019, 11:49 AM
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I put a 2012 68RFE in my 95, now 96, 2500 about a year an a half ago and couldn't be happier. It was not that difficult, not much modifying at all, and now I have 6 speeds, with a very low reverse, tow haul, manual shifting with a rocker switch, cancel 6th just like the 4th and 5th gens. The cost is way less than an Allison swap as I looked into them first. The other thing I like is when you look at the gear ratios for all of these the 68 has the best spread in my mind. IN an effort not ot highjack this thread if you are interested pm me and I can get you more details.

'96' CCLB SLT, 4x4, 12V, (68RFE, Rev Max TC, VB work), KDP, '98' Spt. Hdlt.,Pwr Tow Mir., gauges, 16*, 4K GSK, 60#'s, TT AOFV, 3pc Ex., PDD 5x12's, HE351cw, AFCLive, TB 4" Ex., BHAF, 265x75x16's, Str. Bx Brace, HD Str., Red-Head, Air Bag's
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post #4 of 15 (permalink) Old 10-08-2019, 01:00 PM
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Quote:
Originally Posted by 63willys View Post
I put a 2012 68RFE in my 95, now 96, 2500 about a year an a half ago and couldn't be happier. It was not that difficult, not much modifying at all, and now I have 6 speeds, with a very low reverse, tow haul, manual shifting with a rocker switch, cancel 6th just like the 4th and 5th gens. The cost is way less than an Allison swap as I looked into them first. The other thing I like is when you look at the gear ratios for all of these the 68 has the best spread in my mind. IN an effort not ot highjack this thread if you are interested pm me and I can get you more details.
if you have time...maybe a quick build thread would be cool to see. never thought about 68RFE for these trucks.

BJ

95 ECLB 4x4, DSS, HD X-over steering, auto., Hell bent 2.5" lvl, Thuren track bar, tabbed KDP, 4" MBRP, Otherwise all stock.
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post #5 of 15 (permalink) Old 10-08-2019, 01:27 PM
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Quote:
Originally Posted by 63willys View Post
I put a 2012 68RFE in my 95, now 96, 2500 about a year an a half ago and couldn't be happier. It was not that difficult, not much modifying at all, and now I have 6 speeds, with a very low reverse, tow haul, manual shifting with a rocker switch, cancel 6th just like the 4th and 5th gens. The cost is way less than an Allison swap as I looked into them first. The other thing I like is when you look at the gear ratios for all of these the 68 has the best spread in my mind. IN an effort not ot highjack this thread if you are interested pm me and I can get you more details.

No build thread?

How evil....

Daily driver/ workhorse: 1994 2500SLT 4x4 Auto. Hewitt EGT, Boost, Trans gauges, Under hood Mech FP gauge, Trident fuel lines, Tork Tek OFV, Mag-Hytec DD Transmission Pan, Ford manual hub conversion, Diamond eye 4" turbo back, 37337 Upgrade. 260K

98 2500slt 4x4 ECLB moldy G56, south bend clutch 3rd gen trac bar , boxed control arms, billet tappet cover w/ dual breathers trident fuel lines, Tork Tek OFV, 4' stainless side dump with muffler 240k
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post #6 of 15 (permalink) Old 10-08-2019, 01:43 PM
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I will probably send a 68RFE after the performance market has had a chance to do to them what they've done with the 47/48s. Not anytime soon though.

'95 2500 ECLB 4x4, 334k and paused due to epic transformation in progress.
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post #7 of 15 (permalink) Old 10-08-2019, 02:52 PM
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To all, in my defense, lol, I was so busy, and in a time crunch, and not near a computer I just didn't think of it. The other thing is I can't get pic's to upload any more. I do have a few though. I might also add that most everything just bolted up. The reason I got the 2012 version as it was made for the higher horsepower 6.7L Cummins. I did a lot of research on the 4th and 5th gen sites here also.
I found a site while looking to see which way I wanted to go that went down the list of transmissions that could be used in these trucks. The 68 came out on top for me. I only needed one spacer for the trans mount on the motor. It was about 3/8". You do have to enlarge the pilot hole in the crank to accept the 68 TC. That was easy enough and doesn't hurt anything. Otherwise everything else just bolted up. I did also have to change the input gear in the transfer case to the 28 tooth one that you would have to do with any of the manual swaps and it was off the trans anyway. If you look on this forum I did a thread on the transmission crossmembers as I was looking for something better than my '95 one. It would have worked but in my research I found the 98 one to be better because it was bigger and it still bolted right up to the frame and was the same height as all of them so it was a simple bolt on. There are pic's on that thread of the crossmembers. The shift linkage on the column still works fine I just needed to make a bracket for the trans for the linkage to mount to. Pretty simple really. You will need a TCM but the site I found had a kit for it and he does the programing too.
Maybe the best thing to do here is to give the link to the site and you can then look for ourselves. I would be glad to answer any questions about how the install went as I might be able to save you some time. The costliest part was finding the trans. but still cheaper than an Allison.
Not sure if I am violating any Forum protocols here but here is the site: transmissiontuner.com Jason is who I have dealing with and he is very patient and good to work with.
Hope this helps and I am open to questions. Again sorry about the lack of a build thread.

'96' CCLB SLT, 4x4, 12V, (68RFE, Rev Max TC, VB work), KDP, '98' Spt. Hdlt.,Pwr Tow Mir., gauges, 16*, 4K GSK, 60#'s, TT AOFV, 3pc Ex., PDD 5x12's, HE351cw, AFCLive, TB 4" Ex., BHAF, 265x75x16's, Str. Bx Brace, HD Str., Red-Head, Air Bag's
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post #8 of 15 (permalink) Old 10-08-2019, 03:06 PM
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Sorry but I see a typo. It was the 29 tooth Transfer case gear not a 28 that I had to put in. Also I might add that I now have lock to lock shifts from 3rd up to 6th in Tow Haul and locked in normal 5 to 6. Nice for towing.

'96' CCLB SLT, 4x4, 12V, (68RFE, Rev Max TC, VB work), KDP, '98' Spt. Hdlt.,Pwr Tow Mir., gauges, 16*, 4K GSK, 60#'s, TT AOFV, 3pc Ex., PDD 5x12's, HE351cw, AFCLive, TB 4" Ex., BHAF, 265x75x16's, Str. Bx Brace, HD Str., Red-Head, Air Bag's
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post #9 of 15 (permalink) Old 10-08-2019, 07:09 PM
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https://www.cumminsforum.com/forum/9...t=crossmembers
Here is a link to the crossmember thread I spoke of.

'96' CCLB SLT, 4x4, 12V, (68RFE, Rev Max TC, VB work), KDP, '98' Spt. Hdlt.,Pwr Tow Mir., gauges, 16*, 4K GSK, 60#'s, TT AOFV, 3pc Ex., PDD 5x12's, HE351cw, AFCLive, TB 4" Ex., BHAF, 265x75x16's, Str. Bx Brace, HD Str., Red-Head, Air Bag's
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post #10 of 15 (permalink) Old 10-08-2019, 10:03 PM Thread Starter
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I was thinking of a 6 sp manual shift instead of auto with a south bend clutch that set up in my 06 has never given me a issue but I may have to hold off now driving the 94 to work check engine light came on look down and have no charge put multie meter on batteries while running and no charge there then check the alternator and it has 16 volts at the back of it but not going anywhere from there is that a pcm problem? My tach still working and ac working to make things worse the 06 is in shop with a short in harness somewhere what a day
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post #11 of 15 (permalink) Old 10-09-2019, 11:12 AM
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Sorry to hear about your problems with wiring. That is why I hate it. GRRR.... Not sure about he PCM being the problem. There are a lot of wires between the Alt. and the PCM as I recall.
I wanted something different than a 4sp. especially one with a big jump between 3rd and 4th/OD. As others drive my truck a manual wasn't going to work so an auto was my only choice.
Hope someone with more electrical knowledge hops on here to help you.
Good luck.

'96' CCLB SLT, 4x4, 12V, (68RFE, Rev Max TC, VB work), KDP, '98' Spt. Hdlt.,Pwr Tow Mir., gauges, 16*, 4K GSK, 60#'s, TT AOFV, 3pc Ex., PDD 5x12's, HE351cw, AFCLive, TB 4" Ex., BHAF, 265x75x16's, Str. Bx Brace, HD Str., Red-Head, Air Bag's
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post #12 of 15 (permalink) Old 10-09-2019, 02:54 PM
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There is a master fuse in the PDC linking the alternator to the left side battery. It might be blown.

97 3500, 2 WD, G56, slightly bombed, 1.3 million miles. Started the second million on 8/24/13
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