8v92guy said: (quoted from post at 03:15:11 12/17/13) A Allison out of a medium duty truck is defiantly stronger than a dodge trans. It is also not that expensive to do a conversion just converted a 97 12valve to gm turbo 400. $900 for bell housing and flexplate. $300 for used trans would have used alission but space is an issue on this application its in a 74 IH one ton.
An Allison is stronger and it has more "gears". But after you figure the cost of the computer to control the trans, adapter, crossmember modifications(maybe), driveshaft modifications and any special adaptation costs for a transfer case to bolt up(if you have 4wd)... I would figure if you got a steal you could get that stuff at $1000
Then the cost of the trans at somewhere around $2000.
Early 2000's Allisons were rated at around 500 ft-lbs of input so it wouldnt handle much over stock power. So then there's the cost of aftermarket to beef it up.
Thats the way I looked at it. Doing the work myself, for way less than $3000 I can get a pretty mean 47re. Right now it holds 525 ft-lbs no problem.
The later Allisons had 6 speeds and could handle big power. But then so could the new 6 speed trannys behind the new dodges.
This post was edited by PretendFarmer at 04:47:29 12/18/13 2 times.
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