Thinking of a 4bt or 6bt swap?? help

[GLTHFJ60]

Whats a good auto w od transmisson and transfercase setup??

If you're going with the 6BT, you'll want something that can stand up to the power. I've read that the Ddoge 47rh ( IIRC ) is a good transmission with overdrive and is what came in the Dodge Cummins pickups. No clue what transfer case came with it.

Sounds like if you found a 94-97 Cummins Ram auto that you'd have just about everything you want. I say pick up one of those trucks then swap over the whole drivetrain and you're good to go! Depending on how much you scored the donor truck for, that could be a relatively cheap route. She'll then have one ton axles, which would give you stability, but add a bit more work to the swap.

 

[island45]

Some of us dinosaurs still like the cummins 6at. 6 cyl, turbo diesel, 120 hp in stock form. They were developed for onan gensets and in the 80s cummins offered an automotive version used primarily in UPS and Frito-lay trucks. Pretty much a direct replacement for the 292 chev inline six they took out. The bellhousing is set up for any gm tranny. (or lc adapter)....It's all mechanical and only needs a couple of wires and a fuel line to run. UPS repowered with a gm v6 in the 90s and a bunch of 6ats came on the market. I have one in a 54 gmc dump truck with a turbo 400, another in a '59 ford f350 pickup with an sm465 and a third running on a stand in my shop. They are indirect injected and develop rated hp at 3400 rpm. If nobody stops me, I'm gonna stick the last one in the fj 60 I bought this morning. To see and hear the one I swapped into my f350 last winter, go to youtube and type in (59 f350 with cummins 6at). I talked to a guy who ran one in a fj55 for 15000 miles before he sold it. Don't know the mileage on any of mine, but they all have great oil pressure and no blowby. No big powerhouse, but I get almost 20 mpg in the tank of a pickup. I see them on CL here and there. Good luck in whatever you do. Diesels are awesome.

 

[FLNewt]

Good auto's with OD seem to be the 46rh and 47rh. The latter will have more wiring I believe.

I suggest getting a drivetrain from a truck, I've found that it can be cheaper and easier. But that's only my experience.

 

[69rambler]

Use the A440 that's in there, bolt a 12 valve cummins directly to it, just upgrade the torque converter and bump up the line pressure.

We make the adapters to go from Dodge auto to Landcruiser splitcase too, but really wouldn't recommend that route compared to keeping the original Aisin tranny. Your miles ahead beefing the old Aisin up a bit compared to re-engineering the entire drivetrain downstream of the engine.

 

[FLNewt]

Use the A440 that's in there, bolt a 12 valve cummins directly to it, just upgrade the torque converter and bump up the line pressure.

We make the adapters to go from Dodge auto to Landcruiser splitcase too, but really wouldn't recommend that route compared to keeping the original Aisin tranny. Your miles ahead beefing the old Aisin up a bit compared to re-engineering the entire drivetrain downstream of the engine.

More info please. As far as I know no one makes an adapter to bolt the cummins to the toyota transmission. I've searched high and low to no avail.

 

[69rambler]

We make adapters for the Toyota R150, H42, H55, A440, A442 and A343 transmissions.

 

[StevoJonesFJ60]

I can't imagine those transmissions holding up that great to the torque of the 6BT, especially if he ever decides to turn up the power on the motor which is super easy to do.

For a 4BT I'm sure it would work very well though. And they look very well machined. Do you offer steel and aluminum versions?

 

[69rambler]

I can't imagine those transmissions holding up that great to the torque of the 6BT, especially if he ever decides to turn up the power on the motor which is super easy to do.

That's a valid concern, but the Aisins are a larger and more capable tranny than you'd expect to find in an SUV like the Landcruiser. They're every bit the size of a Dodge auto. The A440 converters are pretty terrible in stock form and should be upgraded to suit the diesel. A 6BT at stock power levels is plenty of power and economy for a Landcruiser without turning it up, but there is room to grow.

The bellhousing adapters are machined from 6061 plate, the flywheels are fully machined forged 1045 steel, the flexplates (not pictured) are coined from chromoly steel. If you're asking whether the bellhousing adapter is available in steel the answer is no. It would weigh 200+ pounds and offer zero advantage to heat treated 6000 series aluminum.

 

[StevoJonesFJ60]

That's a valid concern, but the Aisins are a larger and more capable tranny than you'd expect to find in an SUV like the Landcruiser. They're every bit the size of a Dodge auto. The A440 converters are pretty terrible in stock form and should be upgraded to suit the diesel. A 6BT at stock power levels is plenty of power and economy for a Landcruiser without turning it up, but there is room to grow.

No arguing the fact that 160hp 400ft-lbs should be plenty, but even the the dodge autos don't hold up that great when you increase the power.
The 6BTs can make 300hp practically for free just by tuning the pump, adding a aftermarket pin or plate and upgrading the compressor side of the turbo.
Do you happen to have any specs on the A440 or A442 in regards to max input torque ratings?

 

[OGBeno]

Do you happen to have any specs on the A440 or A442 in regards to max input torque ratings?

Million dollar question. No one seems to be able to find any of this information from either Aisin Seiki or from Toyota engineering.

As the saying goes, install and see when it breaks.

 

[FLNewt]

Very interesting, more info on power handling capabilities?

 

[69rambler]

No arguing the fact that 160hp 400ft-lbs should be plenty, but even the the dodge autos don't hold up that great when you increase the power.
The 6BTs can make 300hp practically for free just by tuning the pump, adding a aftermarket pin or plate and upgrading the compressor side of the turbo.
Do you happen to have any specs on the A440 or A442 in regards to max input torque ratings?

I don't mean to argue here, but there are lots of people, myself included, who own Cummins engines with plenty of miles on them, love driving them everyday and have never touched the screws or modified them in any way. My daily driver has 335,000 miles making 160HP and 400 lb/ft and has never been revved over 2400 RPM in it's life. It has the original clutch pressure plate and disc with 90% life left (at last check to replace the pilot bearing last year)and I tow with it regularly. The truck it's in weighs 5100 pounds which is near the same as your average Landcruiser.

Myself, I don't want a 300HP 12 valve. I find 160 HP can do absolutely anything you can safely do with a pickup. I have logged more seat time in 4BT powered vehicles than most people and have personally towed 16,000 GCVW with a 100% stock 105HP 4BT hooked to a mildly upgraded dodge automatic, 3.55 gears and 31" tires. Even towing that weight it was able to get on the freeway at 60 MPH and went up a very steep grade (7%?) at 40 MPH.

I've turned plenty of diesel screws and driven tons of overpowered diesel pickups. I'm past that point, been there, done it and not interested in blowing intercoolers apart, exploding clutches and snapping axles. I really like the idea of buying a reasonably maintained stock 5.9 mechanical cummins engine and doing nothing bot changing the oil every 5K miles, fuel and oil filters and adjusting the valves every 20K or so and driving it for the rest of my life never needing to worry about it wearing out or being less than perfectly reliable.

The Landcruiser Aisin A440's and A442's closely related brother is the A450-43LE. It would be worth a google search of "A450" to get an idea what tranny is really under your Landcruiser. No, they are not the same transmission, but the comparison is relevant.

 

[StevoJonesFJ60]

I don't mean to argue here, but there are lots of people, myself included, who own Cummins engines with plenty of miles on them, love driving them everyday and have never touched the screws or modified them in any way. My daily driver has 335,000 miles making 160HP and 400 lb/ft and has never been revved over 2400 RPM in it's life. It has the original clutch pressure plate and disc with 90% life left (at last check to replace the pilot bearing last year)and I tow with it regularly. The truck it's in weighs 5100 pounds which is near the same as your average Landcruiser.

Myself, I don't want a 300HP 12 valve. I find 160 HP can do absolutely anything you can safely do with a pickup. I have logged more seat time in 4BT powered vehicles than most people and have personally towed 16,000 GCVW with a 100% stock 105HP 4BT hooked to a mildly upgraded dodge automatic, 3.55 gears and 31" tires. Even towing that weight it was able to get on the freeway at 60 MPH and went up a very steep grade (7%?) at 40 MPH.

I've turned plenty of diesel screws and driven tons of overpowered diesel pickups. I'm past that point, been there, done it and not interested in blowing intercoolers apart, exploding clutches and snapping axles. I really like the idea of buying a reasonably maintained stock 5.9 mechanical cummins engine and doing nothing bot changing the oil every 5K miles, fuel and oil filters and adjusting the valves every 20K or so and driving it for the rest of my life never needing to worry about it wearing out or being less than perfectly reliable.

The Landcruiser Aisin A440's and A442's closely related brother is the A450-43LE. It would be worth a google search of "A450" to get an idea what tranny is really under your Landcruiser. No, they are not the same transmission, but the comparison is relevant.

I'm sorry if I came off as argumentative here, and completely agree with having a reliable engine like a stock 5.9.

The thing that is of concern is that a person might take the time and money to get a 6BT swapped in front of a A440 or A442 just to have it blow up down the line.
I have searched for info about the A450-43LE and apparently it is a "beefed up" version of the other two motors with extra clutches and is stouter in general. Does anyone have any specs at all?
The 5.9 Cummins is going to make a lot of torque very quickly, much faster than the landcruiser motors ever did.

 

[69rambler]

I'm sorry if I came off as argumentative here, and completely agree with having a reliable engine like a stock 5.9.

The thing that is of concern is that a person might take the time and money to get a 6BT swapped in front of a A440 or A442 just to have it blow up down the line.
I have searched for info about the A450-43LE and apparently it is a "beefed up" version of the other two motors with extra clutches and is stouter in general. Does anyone have any specs at all?
The 5.9 Cummins is going to make a lot of torque very quickly, much faster than the landcruiser motors ever did.

The A450 is the same basic transmission with a little more clutch area and a couple slightly larger hard parts. They are used behind <250 HP turbodiesels in 26,000 pound medium duty truck chassis.

Point being the very common A450 has all your A440 extreme power upgrade parts in it in stock form, and they aren't that different.

 

[fj62max]

So is that tranny auto with od and will my transfer case bolt on?? Will that adapter work??

 

[OGBeno]

The A450 is the same basic transmission with a little more clutch area and a couple slightly larger hard parts. They are used behind <250 HP turbodiesels in 26,000 pound medium duty truck chassis.

Point being the very common A450 has all your A440 extreme power upgrade parts in it in stock form, and they aren't that different.

Very interesting. Need to research that unit. Good info.

 

[tclark]

Don't forget that though you may get 20mpg diesel is now dang near $1/gal more than gas, at least around here.

 

[GLTHFJ60]

Don't forget that though you may get 20mpg diesel is now dang near $1/gal more than gas, at least around here.

If you're doing the diesel swap for the MPG gains alone, then you're doing it for the wrong reasons. Going farther per gallon is a bonus IMO.

 

[69rambler]

So is that tranny auto with od and will my transfer case bolt on?? Will that adapter work??

The A440 is what comes in an FJ62. Yes it is overdrive and yes we make adapters to bolt other engines to this transmission.

 

[tclark]

If you're doing the diesel swap for the MPG gains alone, then you're doing it for the wrong reasons. Going farther per gallon is a bonus IMO.

Agreed; just wanted to point that out as that's usually something that at least helps to justify doing something like this.