Builds fj40 with 4 link fj80 axles project

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Mar 6, 2007
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Well I am about to start my project. I am swaping out axles on my 67 fj40 with 91 fj 80 axles and a 4 link with coils. I have been doing a lot of head scratching and asking a lot of questions to the folks down at a 4 wheel drive shop close to me. They do a lot of 4 link suspensions on the rock crawlers they build. So now I think I am about ready to tackle this thing. I still need to get my DOM tubing and all of my rod ends, springs and shocks, hell I still need everything but my axles. My planed start date actually is going to be April 14th. I that should give me enough time to get all of my parts together and get my brackets made. I did a search in the FAQ and found a guy that did the same thing I plan on doing. Looking at that really helped me with some of the things I had in mind. I will keep eveyone posted and share some pics if anyone is interested and I am always open to any suggestions if anyone has already been through this, Late!:D
 
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Proffitts Cruisers has all the cool brackets you'll need for a 4 link. I just finished mine with fj60 axles, 4 link rear with 1/4 eliptical srings and front SOA using his brackets to out board the front springs. Good luck.
 
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cool thanks for the info. I am trying to figure out how the suspension calculator works but I am not to savy on all of the terms. Anti squat etc etc etc
 
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what are the ideal numbers to shoot for on the design summary when using the suspension calculator? anyone know?
 
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Very nice. Subscribing. Let me know if it moves to the Hardcore Section. Several good threads there.

I am collecting parts to do my 4-link and got my brackets from Ruff Stuff. Have noticed also that Ballistic Fabrication has some good stuff too (just wish they'd have a sale on their forged joints like Dan is for those rod ends - you can't beat that price). Poly Performance. Several others have also been recommended that I can't recollect.

Local guy down here did the Proffitts 4-link rear kit. Works very very well.

Another friend did something similar about 8 years ago - except that he cut the entire rear frame section and suspension out of an FJ80 swapped to his FJ40 frame (cut near to the middle) and then built his own 3-link front end a few years later. The amount of flex that thing has is sik.
 
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BJ40 with sahara 80 axels

i have a BJ 40 with 80 axels with custom coils And the original 5 link suspension for the rear and 3 link cofig for front as the sahara 80. I am planning to convert this to a 4 link system after removing the panhard rods.
The main reason for this is , restricted articulation. But i use this rig on the road and want it to be smooth as possible. Lot of my friends tell me the 4 link system is more suitable for rock crawlers and not for high speed stunts and the rest.
Any IDEAS PLEASE????:
cheers:
 

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