cummins auto trans gen 1
- Thread starter Rob
- Start date
I would be very interested in the details on the conversion. i was just trying to stay away from the computer because this application is going to be for offroad use only in a 92 extended cab ctd with 2 1/2 ton rockwells on 46" goodyears. i really wanted a strong 3 sp auto with no computer. some people say there is a allison auto that can be used but i don't know which one to look for. any body got any good ideas, i'm tired of the getrag 5sp
dazedandconfused
Registered User
KTA-Cummins on diesel-central has one of the baddest first gens out thier and he says you can build the 727 torque flight to hold.
Andy
Andy
Ggg
Registered User
The mechanical Allison you are looking for is the AT series, such as the AT545 not any of the new world series. The next bigger is the MT series but I believe they are too big to fit in the trans tunnel. Since you said for off road only I will assume you do not care about highway speeds or economy. Then the choice is simple, A727, it can be built to be one of the most stout trannies ever made. Goerend Brothers in IA is the trans shop to talk to about building one.
SKimballC
Registered User
The 47RH from 94-95 or the 518 from 91(?) to 93 can be used without a computer with a couple of oil pressure switches to control the 3-4 shift and TCC lockup. Pretty much like this-
http://www.transmissioncenter.net/alto_3.htm
Though you could use more appropriate switches for your setup with them big honkin' tires. I talked to a couple transmission guys, one at ATS and one at BD Power who both said that the pressure switches work great, and I found some factory diagrams and the test port on the 47RH is the same as the 518 in the above link.
Though, again, for your application you may not need an OD transmission.
http://www.transmissioncenter.net/alto_3.htm
Though you could use more appropriate switches for your setup with them big honkin' tires. I talked to a couple transmission guys, one at ATS and one at BD Power who both said that the pressure switches work great, and I found some factory diagrams and the test port on the 47RH is the same as the 518 in the above link.
Though, again, for your application you may not need an OD transmission.
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