720 SAS help

[fsjeep1]

Anyone have or seen any nissan 720's SAS'd? My dad has an 84 4x4 king cab and we are starting his project, junking the box for a flat deck, exo, bob the frame, new drivers floor pan, and swaping in a solid front toyota axle. We just have to figure out what springs to run for the front and rear, I am a welder/fabricator at work so I have access to a plasma cutter and other fun tools so making up new hangers and such is not hard.

I am not sure what we will have to do for the steering(box, pitman arm, hysteer?) So far my dad plans to run 35" M/T tires, possibly 36" swampers.

Anyone have any suggestions or tech/links that would be of help, that would be very much appreciate


cheers Dwain

[rednekit]

i ran chevy s 10 in the rear and f 150's in the front and i have no complaints
though new hangers will be a must in the front
the rear hangers are wide enough you will have to relocate the mounting hole.

for what it is worth

[Hillclimber]

My buddy and I are doing the planning for a 720 swap. For the rear we already swapped in a nissan H233b, Reason for that is that is that its a bolt on axle, drive shaft fits ect and the gearing is lower than stock(and it was free). For the front we are using a D44 from a Waggy. Steering parts are easily avail, Cheby flat tops, and crossover..
The nissan 4.625 gears and waggy 4.56's should alow u to run 35's.

[GoodOleBoy]

When I did it I used the rears from a YJ, I used stock springs but If you get 2.5 or 3" springs that should give you plenty of room. Most toy guy seem to think stock springs give about 2-2.5 lift on a toy, I assumed about the same for the 720. The springs are cheap and flex is very good. The rears have 6 leafs, the frounts are 5 leaf and have the same dimensions.

[fsjeep1]

what did you guys do for steering then? Did you use the nissan steering box or something different? I have a line on a free front toyota diff housing and some of the other parts for it, and some free springs. We are going to use the factory rear nissan diff, it has welded 4.37's in there now and someone I know has the same gear ratio in a toyota 3rd member.

Thanks again for your guys input

cheers Dwain

[jesusno2]

man if i was doing that swap i'd throw some yota rear springs in the frt they flex good and also move the frt axle ahead 1.5 inches so your tires stay clear of the fire wall plus you get a little lift out of them and their cheap as hell and i would use a yota ps box also to match with crossover steering

[fsjeep1]

sweet, thanks for the input, much appreciate it.

cheers

[justscoutin]

also might look into chevy 57" or 62" rear springs. supposed to be about 3" of lift on a yota, so should be close to the same on the 720. post some pics of your swap, got a 720 4x4 with a diesel in it i've been thinking of swappin a solid axle in.

[fsjeep1]

I will definately keep you posted and I take pics of everything I do. Havent started the SAS yet, just replacing a couple of rotten floor board sections and doing the flatdeck first, then the SAS begins. Pics to come

[fsjeep1]

just picked up a toy solid front axle complete, steering linkage, and rear toy springs and shackles for a steal of a deal, the guy is going to give me a set of 63" rear chevy springs as well, he owns an auto wrecker about 150km away from my house

[GoodOleBoy]

I used the stock steering box its been a while but, I belive the pitman are has a ball joint. We cut it out and made a bushing to replace it with a hole in the center, then use a hemi on that end.

[XterraGuy]

There was a guy here, can't recall his name/handle, that had two or three SAS-ed 620 and 720 trucks in his family. Hopefully he'll show up or someone will remember and ping him.

[fsjeep1]

here are some pics so far of the project





just got the front tacked in and going to start the rear, will make all the gussets and weld everything up at once....more pics to come

enjoy

[projckt_Wldkat]

Keep us updated, I'm getting ready ot start on my own SAS after I do some minor engine work.

[fsjeep1]

will do for sure, been a little slow the last week or so, been sick and also sourcing some parts. I have been playing around with the ideas for the front shaft, I would like to do a square d-shaft up front, using a toy front flange at the diff, and a toy double cardan at the t-case, but the splines and output shaft sizes are different between the nissan and the toyota trucks. Looking at the nissan front and rear output flange yoke, they are different, the front is too small for the toy double cardan, so I think I will use a nissan rear output flange yoke and just redrill the holes offset to match the toy stuff, and go from there. If anyone has any other ideas feel free to share....more to come

Cheers Dwain

[projckt_Wldkat]

Are you still using the stock t-case?

[fsjeep1]

Originally Posted by projckt_Wldkat

Are you still using the stock t-case?

yes, for now at least, next spring dad wants to do a small block swap so we'll probably go dual t-cases when that happens, if he changes his mind about this swap then we'll figure something else out.

[fsjeep1]

Originally Posted by GoodOleBoy

I used the stock steering box its been a while but, I belive the pitman are has a ball joint. We cut it out and made a bushing to replace it with a hole in the center, then use a hemi on that end.

yes the pitman arm is the way you described......what did you use for arms, did you go with a hysteer kit of some kind and then just change the one end at the pitman arm, or did you do something different for arms and linkage assembly? Thanks in advance

[projckt_Wldkat]

Is the driveline a straight shot from the t-case to the front axle? I heard that the Nissan had a center diff, not a left or right side drop. This is great, getting most of my questions now.

[fsjeep1]

the driveline isnt quite straight, but it wasnt from the factory either, I always thought they were, but it was a little offset to the drivers side, now its offset about the same towards the passenger side, I was a little worried about that because the nissan has a funny shaped oilpan, but with the weight on the springs there is a ton of room still between the oilpan and the diff. I used a jack and flexed it out some and it didnt even come close to hitting. Any more questions shoot them my way, if I can answer them I will, but I am just dealing with some things as I go along, steering and d-shafts will be the next thing besides the rear spring swap, and a friend is building me some stainless braided brake lines as well.

[projckt_Wldkat]

Kickass, sorry if I'm jacking your thread, but I am about to do the samething. Looks like you're doing a great job, keep it up.

[fsjeep1]

no worries

[fsjeep1]

I found something interesting today, while searching around for a nissan divorced t-case rear flange yoke to put on the front of the t-case(the front flange yoke is a lot smaller in diameter), I didnt find any nissan stuff at the wrecking yard, but I did find a t-case on the shelf that said it was from an 84 suzuki, and it had the identical flange yoke on it, tried the nissan yoke on the zuki t-case and it matched, just interesting and thought I would share that with others.

[fsjeep1]

Originally Posted by TrooperLX

i was just browsing, good job on your SAS so far. cool project. that is interesting that the yokes match up. with my rig, i put toyota shit into my isuzu, theres alot that matches, like axle width, brakelines, etc.

let's see some more pics. here's a pic of mine.

nice trooper, thanks for the compliment....What did you end up doing for a front shaft on your trooper? Did you end up running the trooper t-case and trans or toyota as well? What steering box are you running? Just curious as to what you did for the pitman arm and linkage, what highsteer arms are you running? Cheers Dwain

one more question....what springs you running front and rear?

[projckt_Wldkat]

Hey TrooperLX, nice looking rig, I saw driving around Lynnwood a couple of times before I left for school.