i had a 2000 f650 with a cat,the first one blew up and cat replaced it,the new one blew up in 2000 miles and there was no warrenty on it,so they said.
i replaced the cat with a 8.3 cummins and a 10 speed fuller.
the cats suck,as does the warrenty.
beware!!! check with the DOT before you get a F-650 sized truck.
health card,log book,CDL is required if the truck and trailer and load weigh over 29,000 lbs.
also make sure you get the right GVW plates for it.
you do have to go through scales with that size truck.
i sold mine because of all the DOT requirments.
Randy

 

man, i got a health card, log book and cdl a for my ram, havent done any scales yet and have not gotten pulled over with my numbers showing

 

I couldn't tell you for sure. I don't know much about the inner workings of the Allison transmissions. I do know that name is "TRV3000" or "3000 TRV"... I've seen it both ways. I just checked the brochures again to make sure.

It could be what I've been told is just aimed to sell upgraded transmissions. But ever since day one I've been told that the 3000 is not a "medium duty" transmission and if they want a "medium duty" transmission they need to get the 3200. No, I don't know what that means exactly. All I know is that in order to get the high output engines you have to upgrade the transmission. I see what you are saying about the Cummins ISB comparison, though and it makes sense.

One of these days I'm going to do some in depth research as to the difference of the transmissions. All in time, though... right now I'm just marveling in the fact that I'm the only one of our staff that doesn't think the DT570 in the International 4400 we sell is a Detroit Diesel. I learned quick that if I want the correct information I have to go out and get it myself.

 

I would LOVE to see an 8.3 Cummins in our trucks with a 10-speed Ultrashift tranny; or at least a beefy Allison (that could take 600-700HP @ 25000 GCVWR). Does anyone think it could be done? I would naturally be upgrading axles since I know weight would be the first obvious factor. I would want to anyway sine I run 10-lug wheels.

 

There is a picture out there of somone who put an 8.3 in a f250 one time.

 

Any idea where? What tranny?

 

Anyone? Anyone? "Bueller.........Bueller.........Bueller"

 

as of right now, cummins is the only one out there that has been able to meet the new 07 EPA standards. Cat has become way overpriced and their warranty sucks, Detroit (well enough said) and Cummins is the way to go. I built a spec for a customer with a ISB 6.7 and the Allison 2500 and is a 33k GVW truck. I would go with the 3000 series or the 3500 series tranny.

 

If I can remember correctly, somebody is already blowing smoke with a 6.7 with full stock exhaust. He has maybe 70k miles, maybe a tad less!!!! 6.7 might meet standards new, but who knows after a few miles on them

 

My uncle just got a new play truck, F650 with Cat C7 and Allison 3000 auto i believe. It is getting a dually bed on the back. I will be pimping it as soon as its ready!

 

An allison 3000 series would handle the power and torque you would want to put to it. As for the 6.7, there will be an explosion on the market for the commonrail very soon!!!! HINT HINT

 

It was a 7spd Fuller trans. It's been about 3-4 years since it was done. I think the guy was in the Reno, NV area.