FJ60 cummins swap questions

[mp_cude]

Hi all, i have access to a low mileage cummins (80k) out of a 93 dodge. It is a sweet deal and could not pass it up even if i did not do the swap.

Question is what are my options...Retain stock drivetrain? Adapters? Use other trans and t-case+axles? Cross members? Is this commonly done, any websites? I would love to have a cummins in my 85, so any help please. Thanks

edit- I believe it is a cummins 59

 

[jessewmcgregor]

i am sorry i have no answers for this but i will be watching this thread closely as i would lide to do a cummins swap as well. just wondering what all is involved

 

[justin85-60]

Sorry, no info. You may get some here, but also try the diesel section. You should most definitely get an answer there.

 

[Scotty]

Hit up 4BTswaps.com They have a 6BT section.

Just because I have done a 4BT/700R4 swap before. Take whatever budget you have, then double it, and then add another $3K on top of it just to iron the issues out. A swap like that is NOT done on the cheap. There is nothing cheap about it.

 

[BeerStudd76]

Will a 6BT fit? Also, that hunk of metal weighs 1200lbs (or so) which I'm guessing is more than a stock chasis will bear. Am I wrong?

 

[inkpot]

Howdy! The 6bt Cummins in the Dodge is a very large, heavy engine that can be cranked up to scary amounts of power. My son has one in a 97 3/4 ton 4x4, and it make me drool when he hammers the throttle. It is a lot longer, taller, and heavier than a 2F. Even if you can fit it in your engine bay, you still need extra space for a larger radiator, and the intercooler. It would be really sweet if you can pull it off, but I know I don't have the creativity and cubic dollars to make it happen in my Piggy. Good Luck. John

 

[Coyote808]

It's not a question of whether the chassis can handle the weight, which it will, but will it be able to handle the massive amounts of torque. Those engines are great, and there's a reason they're put in such large vehicles. I'm sure there's somebody out there who has one in their rig.

As for cost, if you can get the engine for the down and cheap, don't do it. Because it will cost a lot more than what you think. Ask yourself the questions you should when considering any major repairs. And then double that amount then then double it again, then double it one more time to be safe. In short, multiply your purchase cost of the engine by 8x for a rough guesstimate of the cost of the whole swap. If you're dead set on a diesel swap, further research would definitely be required, and you may want to move this idea over to the diesel section. Just keep asking yourself,"Is this trip really necessary."

 

[DBS311]

Yes, there have been several of the 6bt swaps into a 60 series. You will need to go SOA to fit the Cummins, so be prepared for the cost of that in addition to dropping the engine and trans in. Speaking of trans, which would you use? There is an adapter for fitting the NV4500 to the stock split case, so that is something to consider. The axles will be up to the task as long as you don't abuse all that torque.

Do a search in the 60's section for 6bt and I'm sure you will get multiple threads.

 

[BeerStudd76]

Yes, there have been several of the 6bt swaps into a 60 series. You will need to go SOA to fit the Cummins, so be prepared for the cost of that in addition to dropping the engine and trans in. Speaking of trans, which would you use? There is an adapter for fitting the NV4500 to the stock split case, so that is something to consider. The axles will be up to the task as long as you don't abuse all that torque.

Do a search in the 60's section for 6bt and I'm sure you will get multiple threads.

It depends in the engine, too. Most of the BT6s were paired with auto trannies and the 89-93 is not readily converted to a Getrag or NV4500. One would be far ahead of the game to fid an engine with a manual tranny already on it.

 

[BC40]

It's been done before in 40, 55, 60, and 80 series cruisers. Not sure about longterm effects of the setup as far as frame stress and the other remaining cruiser portion is concerned with that much extra power. The 93 version should be a good starting point though as they had great economy, reliability, and still fairly low power output.
I saved this link off pirate, good build thread:
Cummins 6BT in a '55... - Pirate4x4.Com Bulletin Board
Good luck .

 

[Nemesis Gnat]

im pretty sure a guy on mud put one in his 60... i know the thread will pop up if you search for it

https://forum.ih8mud.com/60-series-wagons/67579-shes-cummin-along-nicely.html

https://forum.ih8mud.com/diesel-tech-24-volts-systems/151930-cummins-6bt-conversion.html

 

[boots4]

A 6bt can be done and you probably won't need to turn it up much (or at all) to get a big grin on your face. A lift is pretty much manditory because the cummins are tall engines.

What are your intended uses for the vehicle? What size tires do you want to run?

 

[mp_cude]

It depends in the engine, too. Most of the BT6s were paired with auto trannies and the 89-93 is not readily converted to a Getrag or NV4500. One would be far ahead of the game to fid an engine with a manual tranny already on it.

This motor is already mated to a getrag, and it is in a 79 ford f-350 4x4....the previous owner blew the tranny....I am willing to do whatever it takes to put this in my 85 fj60, though I really like the 79 fords and may just fix/ change out the tranny in it. I will look into putting an H serries motor in, But i know a guy who did that and it was like $10k. I dont know, Toyota is freakin GAY for not giving us Diesels and H55's, freakin Bast*rds....Na i love toyota but they should have given us diesels

 

[arnott1t]

I have an HJ turboed with a H55....I think

 

[BeerStudd76]

This motor is already mated to a getrag, and it is in a 79 ford f-350 4x4....the previous owner blew the tranny....I am willing to do whatever it takes to put this in my 85 fj60, though I really like the 79 fords and may just fix/ change out the tranny in it. I will look into putting an H serries motor in, But i know a guy who did that and it was like $10k. I dont know, Toyota is freakin GAY for not giving us Diesels and H55's, freakin Bast*rds....Na i love toyota but they should have given us diesels

I'm not a FJ60 expert whatsoever but I've done some rounds with Cummins engines and, IMO, if you want a Cummins diesel a BT4 is a much better fit (physically and functionally).

It doesn't take much to get 140-150 RWHP and 350+ ft lbs of torque out of a BT4, it's far lighter, shorter, (just as tall), and just as durable as the BT6.

A 350 4x4 with a BT6 is the schidt. I'd fix the tranny and roll with it,

JMHO

 

[NocalFJ60]

From what I have seen I would look into the 4BT first too. It would give you plenty of power and the ability to do some mods to get the power up if you want. Also the mileage would be better with a smaller engine.