4bt/cj5
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is the cj5 frame boxed?
a girl locally has a 4bt in the 5 and she said the person who built hers had to reinforce the frame plenty because it wasn't boxed?
i'm not sure if it was overkill but this is what I was told...
if you plan on running a overdrive you might want to check the site by novak because they have the trans lenghts and some usefull info...
i have a 4bt in a cj-7 with a 700r4 and the rear driveshaft is short and there is no room to spare in the front of the engine.
my 2 cents...
john
a girl locally has a 4bt in the 5 and she said the person who built hers had to reinforce the frame plenty because it wasn't boxed?
i'm not sure if it was overkill but this is what I was told...
if you plan on running a overdrive you might want to check the site by novak because they have the trans lenghts and some usefull info...
i have a 4bt in a cj-7 with a 700r4 and the rear driveshaft is short and there is no room to spare in the front of the engine.
my 2 cents...
john
Joined
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329 Posts
Ill echo aboyve comment. The cj5s did not all have boxed frames.....maybe none of them did. That would be to first concern. CJ5s range from 1955 to 1980s. Earlier models had weaker axles (motors didnt produce what they do today) and had low spline counts onthe shafts. Axle upgrades would be nessecary for the power and to support the weight..........much moore heavry then the Iron Duke 4cyl.
Another concern would be drivetrain length. CJ5 is around 88"? I think that would make an auto very difficult..... unless you lengthened the frame
Just some thoughts off the top
Another concern would be drivetrain length. CJ5 is around 88"? I think that would make an auto very difficult..... unless you lengthened the frame
Just some thoughts off the top
Joined
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98 Posts
Wheelbase:
81” pre 1972
83.5” 72-83
76-83 cj5 frames are fully boxed, just like the cj7 & cj8.
CJ5s don’t like Auto transmissions no matter what engine (if 4wd)
Good overdrive transmissions (5spds) are really really hard to fit as well
I have a 78 cj5 factory drive train (6cly, t-18, D-20) and my drive shaft is like 13"
I was contemplating putting my 4BT in my CJ5 but I just completely rebuilt it 5 years ago, so I got an old scout (couldn’t find a good CJ6).
if I were to do it....
It would be best to a 4bt from a ford chassis, with a t-19, then adapting a Dana 18 with a warn overdrive would be easy,
mid 70s Wagoneer Dana 44 axles (both offset to passenger side),
just enough lift to fit the 4BT
The weakest link would be the Dana 18, but if you want good drivability and off-road capability you need overdrive. The warn overdrive only works with the Dana 18 but is one of the easiest ways to get an overdrive into a 5 (assuming you want 4wd).
But then again my 4bt, NV4500 and Bronco Dana 20 is just under 62” long so maybe it could fit, but I doubt it.
Big problem is the depth of the motor but if someone has put one in a 7 then it will fit in a 5 just need some amount of lift.
81” pre 1972
83.5” 72-83
76-83 cj5 frames are fully boxed, just like the cj7 & cj8.
CJ5s don’t like Auto transmissions no matter what engine (if 4wd)
Good overdrive transmissions (5spds) are really really hard to fit as well
I have a 78 cj5 factory drive train (6cly, t-18, D-20) and my drive shaft is like 13"
I was contemplating putting my 4BT in my CJ5 but I just completely rebuilt it 5 years ago, so I got an old scout (couldn’t find a good CJ6).
if I were to do it....
It would be best to a 4bt from a ford chassis, with a t-19, then adapting a Dana 18 with a warn overdrive would be easy,
mid 70s Wagoneer Dana 44 axles (both offset to passenger side),
just enough lift to fit the 4BT
The weakest link would be the Dana 18, but if you want good drivability and off-road capability you need overdrive. The warn overdrive only works with the Dana 18 but is one of the easiest ways to get an overdrive into a 5 (assuming you want 4wd).
But then again my 4bt, NV4500 and Bronco Dana 20 is just under 62” long so maybe it could fit, but I doubt it.
Big problem is the depth of the motor but if someone has put one in a 7 then it will fit in a 5 just need some amount of lift.
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152 Posts
i like my cj7...
it didn't take much fabricating just motor mounts...
i would consider getting a 4bt instead of a 4bta i think there shorter and you might get more clearence with your front diff thats the only problem i ran into with my swap its all jeep parts except for the hydroboost out of a p30 and the 700r4 trans and the 4bta everything else is jeep....
imo-
it didn't take much fabricating just motor mounts...
i would consider getting a 4bt instead of a 4bta i think there shorter and you might get more clearence with your front diff thats the only problem i ran into with my swap its all jeep parts except for the hydroboost out of a p30 and the 700r4 trans and the 4bta everything else is jeep....
imo-
If you were to ask "what is a better vehicle" I'd say a Scout II
But then again I'm a little prejudice on the subject:smokin:
Steve
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329 Posts
Im not sure there is an ideal veichle. There are vehicles that may lend to be better donr vehicles (engine bay dimensions, wheelbase, drivetrain adaptability, etc).
There are many people here with 4bs in a wide range of swaps performed or underway. Some even fabricate conversion parts for cetain applications (Crewcab59 has mounts and crossmembers for fullsize chevys).
A 4b can be shoehorned into about anything. Just plan ahead for what demands you will be placing on the vehicle, what will its functions be, and how much $ you plan to drop. Best of all take something and make it yours. Whatever you drop one in is unique and to mee thats the best part:smile:
There are many people here with 4bs in a wide range of swaps performed or underway. Some even fabricate conversion parts for cetain applications (Crewcab59 has mounts and crossmembers for fullsize chevys).
A 4b can be shoehorned into about anything. Just plan ahead for what demands you will be placing on the vehicle, what will its functions be, and how much $ you plan to drop. Best of all take something and make it yours. Whatever you drop one in is unique and to mee thats the best part:smile:
If you go under "user CP" and edit your profile and add where your located it would be easier to help you find a 4BT.
Steve
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152 Posts
http://www.4btswaps.com/forum/showthread.php?t=12
pics here
let me know if you want to see more
later john
pics here
let me know if you want to see more
later john
I've bought two 4BT's from AvantSalvage . Have not found a source for 4B's anywhere in the SW.
Steve
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152 Posts
this next photo is the reason for the lift and a before photo
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