I've been realy impressed with the A343F i keep treating it harder and harder as I go. if you lock up the converter to early you can float it on demand but that is to be expected with the torque numbers cummins puts down. that is where a nice trans computer comes into really fine tune your lock up for economy and power without over doing it. lcok up early with low TPS input and unlock quick with TPS input before the torque hits. just takes some time to tune right. i'm 15k in on a 250k trans untouched other than a shift kit (just plan on this you'll flare shifts without it). you have to listen to the trans you'll know if it's tuned right. you should have firm quick shifts without flaring and reving then it's not expected.
Diesel Swap: Cummins VS GM 6.5
- Thread starter Blake Loggins
- Start date
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JaketheSSnake
SILVER Star
Well this thread pretty much killed my dreams of putting a Cummins in my 80 
. I had no idea the kit was 10k, that's crazy. I think I could do most of it on my own other than making a trans/transfer case adapter and I know it'd be a lot of work, but I can't see spending that much on just the swap parts.
. I had no idea the kit was 10k, that's crazy. I think I could do most of it on my own other than making a trans/transfer case adapter and I know it'd be a lot of work, but I can't see spending that much on just the swap parts.
- Thread starter
- #43
Are you running the Compushift Trans controller? My FJ80 is a 93. I thought the 93's were mechanical trans? Thanks
maxamillion2345
Franken-80
Well this thread pretty much killed my dreams of putting a Cummins in my 80
Go the route of @Mr Cimarron then. Nv4500 to split case.
Piece it together yourself. Plenty of info and resources here on MUD to get you going. I bought most of my parts before I brought it in for install. I could do everything myself at this point now that my skills are improved from 4 years ago.Well this thread pretty much killed my dreams of putting a Cummins in my 80
i'm running a PCS TCM-2000. i believe you have the A442F in the 93 which is electronically controlled and has a non integrated trans computer but it's not programmable so you will need an aftermarket to do it right. i used the Toyota computer for a little over a year and made it work but it is not ideal i got it tuned to where it would up shift well enough but had to manually down shift if i didn't come to a stop and many other quarks.
Which Cummins did you buy and from where? Isnt Cummins offering a complete.swap.kit that was announxed at SEMA 2016?
12V 1990 cummins from a w250 truck,bought it from a farmer out in ohio.I don't know anything about a Cummins swap kit from SEMA.Sounds expensive
bloc
SILVER Star
There have been a handful of threads in this forum about new EPA-compliant turbodiesel engine packages that cummins will be offering soon. The consensus is that they are very expensive and unless you get the most powerful version they'll have trouble motivating an 80-series. But yes, they are cool. Not at all relevant to what the OP wants to do though.. so we definitely shouldn't start debating them here (too)
You asked about power and weight.
My 12v 6BT / NV4500 swapped truck has a stock tune circa 1995 Dodge Ram and a stock fuel plate on it, I'm running 35"s, a 4" OME lift with Comp Coils / heavies for suspension. It is definitely a heavier truck than stock but with heavy / stiff suspension, the ride quality and handling are really good. It turns progressively and predictably, and so while it doesn't corner like a Porsche 911, it never was going to before anyway, and I've adjusted my driving style to cope with the weight. But the additional weight is overcome easily with the motor. With the stock tune alone, the engine never really has to try all that hard. You can go as crazy as you want turning up the motor, but for me, stock is what I want and need.
With the two bumpers I've got, a rooftop tent and a week's worth of camping gear, it'll still run at 75mph and pass on the interstate no problems. When all my gear is out of the truck and I'm just driving around town, I can out-accelerate nearly any other pickup / work truck / semi with ease. You can get silly power out of Cummins motors - I feel like what I've got is more than enough for how I use my truck, balanced against how much torque I want to put into the rest of the drivetrain.
HOW the power gets applied on dirt, on a trail, or rock crawling has been the game changer for me, and ultimately it's where the truck comes into it's sweet spot. So much power and grip out of the whole platform that it puts a grin on my face every time - accelerating up a loose dirt road in 3rd gear with the turbo whistle and a crazy linear torque curve makes it worthwhile for me, and climbing over 11,000 foot passes, even fully loaded down, is a breeze.
I find the swap to have a lot of character, and while I've spent more than I would have liked, I really, really enjoy mine.
My 12v 6BT / NV4500 swapped truck has a stock tune circa 1995 Dodge Ram and a stock fuel plate on it, I'm running 35"s, a 4" OME lift with Comp Coils / heavies for suspension. It is definitely a heavier truck than stock but with heavy / stiff suspension, the ride quality and handling are really good. It turns progressively and predictably, and so while it doesn't corner like a Porsche 911, it never was going to before anyway, and I've adjusted my driving style to cope with the weight. But the additional weight is overcome easily with the motor. With the stock tune alone, the engine never really has to try all that hard. You can go as crazy as you want turning up the motor, but for me, stock is what I want and need.
With the two bumpers I've got, a rooftop tent and a week's worth of camping gear, it'll still run at 75mph and pass on the interstate no problems. When all my gear is out of the truck and I'm just driving around town, I can out-accelerate nearly any other pickup / work truck / semi with ease. You can get silly power out of Cummins motors - I feel like what I've got is more than enough for how I use my truck, balanced against how much torque I want to put into the rest of the drivetrain.
HOW the power gets applied on dirt, on a trail, or rock crawling has been the game changer for me, and ultimately it's where the truck comes into it's sweet spot. So much power and grip out of the whole platform that it puts a grin on my face every time - accelerating up a loose dirt road in 3rd gear with the turbo whistle and a crazy linear torque curve makes it worthwhile for me, and climbing over 11,000 foot passes, even fully loaded down, is a breeze.
I find the swap to have a lot of character, and while I've spent more than I would have liked, I really, really enjoy mine.
