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suspension guys please help wont flex

8.6K views 101 replies 21 participants last post by  CHEROKEEMUDMAN01  
#1 ·
i am in the process of installing a rustys 8.5 lift. they havent be able to give me any help on phone and im out of ideas.so far i have put in my lca brackets and made crossemeber for the long arm setup. both of the lower arms are at same angle and upper arms are at same angle. i have cut the uca mounts off the long are since my truss made the angles of upper arms wrong (hiem was almost maxed out) and set the so that the heim joint is now straight. i tried to flex the truck wiithout coils in it on jackstands. i can lift the passenger side up to 11 deq angle and then driverside starts coming up. i can lift driverside up to a 7 deg angle and passenger side starts lifting. it seems really tight and bound up but there is no pressure on the bolts or any force of any kind i had to use to assembly it. if i remove the uca's the axle will flex as much as i can jack it up with no prob but as soon as the uca are in its stiff. i thought this radious setup would flex like crazy but its all bound up and im at a loss. here are some pics if anyonr can help with ideas i would really appricate it.

 
#72 ·
Lol i never said i didnt trust the trac bar and this kit was made for a dana 30 with lower steeringunder the knuckle not like my wagoneer setup. I am trying to just make shure its right cause if not i would rather correct it now while its appart and parked. I just would like to make it drive the best it possably can so i can enjoy it . I guess im worried about the twist that is now going to be worston the tierod because of the steeper angle of the draglink.
 
#74 ·
Shure they have sold tons but prob not somany for my setup thats all since there telling me oppsite then what i have been told on here. Im going with what u guys are saying and not doing a ota trac bar right away thats all so i guess thats means i am listening to wghat u guys are saying after all. I really do like everyones insite thats all
 
#79 ·
Holy shit....

I didnt even read all of it but this will be my 5 minutes of gl4x4 for this month.

1- your shit is bound up worse than a senior's center that ran out of prune juice.

2- lower it as much as possible. mock it up at full stuff without springs or shocks, take pictures- ask for advice- take 95% of the advice is BS someone heard from someones friend who knew someone who built a pulling trucks suspension and knows everything about making something that quite literally does not move.

3- now, for the real world "DUH!!!!!!!!!!!" take the bolt out of one of the frame side lower links, drop the same side of the axle about a foot, now you can drink a beer and take another dosage of wheaties for the day.... try to lift the lower control arm that is unbolted and nowhere near where it should be and attemp to put it back into place on the frame bracket. it aint gonna happen. the dual radius arm style front ends some of the less than intelligent self proclaimed experts of designing and making a sellable suspension kit for those vehicles would rather make a cheaper part than a properly functioning system. basically, you need compliance in something (OEM systems are in the large deflection the rubber joints offer) as you replace the compliant joints with rigid joints you force the deflection to come from the next weakest link. in the case, you have a built in sway bar.

4- once you establish where your ride height will be, make the track bar mount on the axle side as high as reasonably possible, find a way to put high steer on it so you can have a vehicle that drives predictably by getting the angles and lengths of the track bar and drag link in a reasonable range for what you are working with.

5- just because the track bar and drag link are paralell it doesnt mean you wont have bump steer. you can get bump steer simply by the amount of sweep the huge angle on the track bar. just like bump steer, the axle shifting side to side means the axle is shifting relative to the body rather than the axle shifting relative to the steering wheel. granted, it's not quite as significant as the typical bump steer that everyone has come to associate with the term but the body still turns relative to the axle as you hit a bump.

6- put bushings in with more compliance, get rid of the dual radius arms in favor of a stock style 4 link with a track bar

7- figure out whats wrong with the kit, sell it, then buy an engineered system, or take on a new project, or pay someone to do it correctly.

8- ill probably show back up in another 6 months-or so.... :thumb:

9- :beer:

10- :beer:

ok, I lied, 5 minutes turned into 3 times that... gotta go!
 
#81 ·
no havent been on, work 2 jobs so making time to get onto here is sometimes spotty specialy when most of the helpful insite has expired. rebuilt front axle asembly late last night and got the front brake lines ordered. hopefully sunday can cut out exhaust on drivers side and rerun it to give me someore clearance for starter removal. going to get tires back on it and see how it flexes and drives and if im not to happy with it then ill start saving again and think about a 3 link setup cause a 4 link will never work with the 318 and 727 trans. driver side has zero room unless i ditch the duel exhaust and im not willing to do that. so guess from here see how it goes, got enough info and insite to make me dangrous for a while and plus i have the special olympicas to start training for
 
#87 ·
well figured id throw up some updates since somany people gave me some good advice. got front end all put togher sitting on her tires. flexed it out with cherrypicker and it actuall had alot more flex then i thought with the trucks weight on it. ( so everyone was right and i was wrong with the jack lmao) trac bar seems ok but the steering isnt going to fly. my tre at pitman arm is maxed out at ride heigth and i cant adj it enough to steer it full left and right so steering has to change. i got some new knuckles and a full crossover steering setup underway to help with the angles (also draglink is at 21deg at ride height). also will have to do a otk trac bar setup. the trac bar has to mount on inside of pass coil spring in order to clear the steering. so i am going to loose the big trac bar drop bracket and mount it to outside a little past unibody in order to keep the longest trac bar i can and with the amount of lift i have it should still be fairly long and go from there. hopefully have some pics up soon got rear getting done thisweekend and then ill turn it around and redo the front so it can hopefully be allaround better off.
 
#88 ·
well its finished finally. thank you guys for all imput and help along the way. i ended up making my own steering and trac bar out of 15/8 1/4 wall dom and comb of heim joint and tre. also changed pitch of upper control arms. i am happy with the results but what is ur guys thoughts. i appricate the imput positive or negitave. the tire is 31" off ground when rear tires started to lift off. new leaf pack so its stiff im shure it will get better since i had only 5 miles on it when i flexed it.
 
#93 ·
i am very happy with the flex. i was just saying everything is stiff still so it will get a little more later thats all. the snorkle looks better i just changed it from 2" the 3" since the v8 didnt like 2". i will paint it black like it was before just havent had the time. im to cheap to buy a nice one since i made that for under $20 lol.
 
#97 ·