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Ron, thats TIMMAH, the kid in the wheel chair from South Park!
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I thought about this with my deuce.. a allison AT545 with 395s would be able to maintain 55mph.. but the length might be a problem.. the tranny in a deuce is pretty short.. if you need measurements from a AT545 let me know, I have one that i removed from a international in flavor of a eaton/fuller..did anyone every do this swap i have a customer looking to put a automatic behind his deuce he is a older vet and he has a bad arm so the shifting is really hard for him so if anyone has any info on a automatic that will work so i can pass it on to him that would be awesome
thank you
The Allison transmission in the A3 is not electronic. No AT540 series trannys where. That also applies to the MT600 series and the HT700 series.Not 100% on this but I thought that it has been said the trans in the A3 is electionic.?. It would be had ($$) to mode that to a muilt. That is not to say that you could not get a different auto to go behind the muilt. On another note I thought (not 100%) that they (military) tryed the auto out of the M135/211 in the M35's. Don't know if it was the reo or the muilt.
Now remeber I'm not 100% on this and I did NOT stay at a Holiday Inn last night
Just to confirm what Jeepsinker said, he is 100% correct. The design for the TX200-6 Allison transmission was sold off to the UK for their FV430s and is under strict regulation from international sale. The LDS465-2 pump was unique and truly irreplaceable even if you had an A1 model IP. I know where an Allison transmission is in good condition but it isn't cheap, I've even called Allison and they said they can still service it despite regulations.The LDS465-2 installed in the 8x8 five ton trucks did have an automatic transmission behind them. From what I understand it was an early Allison product and it worked in conjunction with a special injector pump that would refuel the engine as the trans shifted so it didn't break the trans or burn clutches. The design for the trans was sold to the British military and is now classified. Go figure... Because transmissions are such dangerous things you know...
Yes, all early Allison's have a 1:1 final ratio . They came out with overdrive when they went to the "World" transmissions. All electronic. They found it was easier to control ratios better, just software updates. As far as mating up the new style tranny to an older non electronic engine it's pretty easy. You just need a pedal sensor, an electronic tach, a brake sensor and of course the tranny "ECM" unit.I have researched the mechanical Allison's and the ones that I have found have a 1:1 final drive, no overdrive.
To get an overdrive in an Allison you have to go to an electronic transmission. This would require some custom parts to mate the electronic trans to a mechanical engine.
You could have used the AT545 but you would need a valve body dyno to set the shift points. You could try it by yourself but by the time you finished adjusting and installing the oil pan and oil and checking and adjusting again, repeat until done, you would save yourself money and LOTS of time by using the valve body dyno. It can be done though.Correct me if wrong. I needed a AT1545 for a customers M35a3 and thought about using an AT 545 from a Chev school bus with a 366 v-8 in it. I found out that it would not have shifted because the shift points for a gas v-8 would be so high that the diesel would never rev high enough to get it to shift. I found 2 used AT1545's and used one of them ( especially since the Allison dealer quoted me $6250.00 to rebuild the old AT1545). I still have the other used takeout AT1545 for sale if anyone needs one. Thanks , Paul
The length IS a problem... According to the link provided in post#27 the AT545 measures 27.2", from its SAE#3 bell-housing face to the output flange; vs. the Spicer with only 21.86". That difference is about half the length of the jack-shaft in between the Spicer and the T-case...I thought about this with my deuce.. a Allison AT545 with 395s would be able to maintain 55mph.. but the length might be a problem.. the tranny in a deuce is pretty short.. if you need measurements from a AT545 let me know, I have one that i removed from a international in flavor of a eaton/fuller..
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