727 or 904 behind Cummins in a Ram Truck
 

Will a Mopar 727 or 904 transmission (sb or bb bellhousing) work behind a 5.9L cummins engine?

I'm thinking the OEM application would be a 1991 or 1992 dodge pick-up.

Thanks,

Chris

Re: 727 or 904 behind Cummins in a Ram Truck
 

Chris,

I don't believe so. I have had 3 Dodge diesels, a 98, 02 and an 05. All three trans were different.

The 02 trans was a joke. Maybe someone else might know.

#5457

Curt Rees

Re: 727 or 904 behind Cummins in a Ram Truck
 

Chris,

I beleive the 1st generation of Dodge diesels, 1989 through--??, came with Allisons. My 02 was a Chrysler (junk) product.

I am not sure of the year that the Allisons were dropped. Again, maybe someone else might shed some light.

#5457

Curt Rees

Re: 727 or 904 behind Cummins in a Ram Truck
 

The bell housings are different it will have to be the 727 for a cummins. Chrysler put a 727 in the first gen cummins trucks. They didn't go to the overdrive until I think 91.

Re: 727 or 904 behind Cummins in a Ram Truck
 

I think I would look at some of the truck pulling sites, or forums and ask them. Its pretty common for them to make 800-1200 hp with a cummins and run some sort of automatic.

Re: 727 or 904 behind Cummins in a Ram Truck
 

If you are going to be pulling a trailer with it, I would put the 6 speed manual in it. We had one with the auto and it would not live so it got sold. bought a second with a 5 speed that kept loosing 5th gear untill it went out of warranty and I fixed it so the nut would not come loose. And one other with a 6 speed with no problems what so ever. The 5&6 speed now have over 350K and 250K on the odometers with no other problems but that POS automatic no mater what we did it would not make it more than 50K without coming apart and we could no longer afford to risk it when moving cattle so it had to go.

Re: 727 or 904 behind Cummins in a Ram Truck
 

I'm asking the question more for fun than anything, thanks for all the replies.

We have allot of the 6BT cummins engines here at work and we were wondering what it would take to take one to put into another vehicle for street or drag racing purposes.

Personally, I think it would be cool to put one in a 63 wagon, tilt it over some and have a diesel slant six.

Re: 727 or 904 behind Cummins in a Ram Truck
 

A HEAVY slant 6! lol I will bet Mike Jeffery could make it run!

#5457

Curt Rees

Re: 727 or 904 behind Cummins in a Ram Truck
 

Just happened to get suckered into going to Walmart with the wife today. While there I saw a mag that has a roadster rat rod type car with a cummins and running 50lbs of boost and nitrous. Its been 2 hours since I was there and the crs has kicked in and for the life of me I cant remember which trans or the name of the mag but if we go back I will check again and post.

Re: 727 or 904 behind Cummins in a Ram Truck
 

Hot Rod! Allison, if my crs has not kicked in!

#5457

Curt Rees

Re: 727 or 904 behind Cummins in a Ram Truck
 

What's neat and why you see it alot is the Cummins 4BT and 6BTdiesels have been used by Dodge, GM and Ford in various chassis over the years (a long time) and the key item is the adaptor plate....this isn't an after market item, but a necessary piece to make the engines compatible for all the different manufacturers.....bread trucks were/are great places to find these engine/trans combos and since Ford and GM both built them the chassis would usually have the 4BT and either one of the matching trannys with the appropriate adaptor plate (the 4BT and 6BT generally use the same adaptor.....if you go on EBAY and do some general searches on 4BT, 6BT in parts there usually is some things there to let you see what these are......


D. L. Rambo

Re: 727 or 904 behind Cummins in a Ram Truck
 

I forgot I had this web site in my favorites

http://www.4btswaps.com



D.L.Rambo

Re: 727 or 904 behind Cummins in a Ram Truck
 

Nice site. My main question is what to use for trans and converter and how much power can be made reliably and without spending a ton of money. Application would be 2wd and probally a car or 1/2 ton pick-up.

Re: 727 or 904 behind Cummins in a Ram Truck
 

Curt,
I with the exception of the Aisen transmissions that come in the new Dodge Cab and Chassis, I don't think any Cummins powered Dodge has ever had anything but a Mopar automatic of some sort behind it. Until the six speed automatic that is now availble, the manual was always the better choice.
Bill

Re: 727 or 904 behind Cummins in a Ram Truck
 

Bill,

I just googled the '89 Dodge diesel pickup options. The 1st generation could be had with a manual or a 3 speed automatic. I could not find anything on what the model of the auto was.

All 3 of the Dodge's I have owned had a Mopar automatic for a transmission. As stated the 2002 trans was junk., I think only produced 1 year.

The best thing about my 2005 is fuel mileage. 22+ at 75 on the interstate! 18+ stop and go.

#5457

Curt Rees

Re: 727 or 904 behind Cummins in a Ram Truck
 

Chris,
To date, the Cummins has had six automatics put behind it. They are:

1) 727-Chrysler built
2) 47RH-Chrysler built-basically a 727 with an OD unit and Hydraulic Governor
3) 47RE-Chrysler built-basically a 727 with an OD unit and Electronic Governor
4) 48RE-Chrysler built-basically a 727 with an OD unit and Electronic Governor-High Torque Capacity
5) AS68RC-Built by Aisin Seiki-Six Speed-Fully Electronic-Has PTO Provision
6) 68RFE-Chrysler built-Six Speed-Fully Electronic

Starting with the 47RH, the alpha-numeric code describes the model designation:
The 4 means 4 forward gears---- a 6 means 6 forward gears
The 7 means high torque capacity-----an 8 would be the highest torque capacity
The R means rear wheel drive
The H means hydraulic control----the E means Electronic Control-----the FE means Fully Electronic Control

As already stated, the Cummins has it's own bellhousing pattern or block plate pattern-however you want to describe it. It is different than the SB and BB patterns. As already stated you could switch the block plate if you wanted to try a Ford or GM transmission.

If you are not going to use a controller, the 727 or 47RH would be your only option as they require no electronics to function.

Send me a PM if you have more questions

Re: 727 or 904 behind Cummins in a Ram Truck
 

You might call A&A Transmission in IN. or check out their web site they are good with automatics especially those Chrys. Phone 317-831-3066 or aandatrans.com or aandatransmission.com

Re: 727 or 904 behind Cummins in a Ram Truck
 

89-91 had a 727 trans. Will fit a Viper or Iron V10 and the Cummins.

Re: 727 or 904 behind Cummins in a Ram Truck
 

Here is what I did. I have a 89 jeep wrangler with a 4bt cummins with twin turbos estimated around 130 hp 550 ftlbs I am using a 700 R4 with the updated (4L60) internal parts, so it has o.d and lock up converter. So you can use anything you want. You just have to make it work or spend around $1600 for the adapters,