Lift knuckles

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Casey1104

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Can I put 6-inch lift knuckles on my lifted truck that already has a rcx lift kit?
 

1999gmc

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If I'm understanding your question correctly, no you can't. The knuckle lifts leave the upper control arms in stock location and move everything else down leaving the knuckle 4-6" longer than the stock one to make up the space. Where non knuckle lifts have brackets to move everything plus upper control arms down. You could possibly use a 6" knuckle by putting the upper control arms back in stock location and then use the longer 6" knuckles. But on my RCD kit it also widens the track width and uses spacers between the differential and front axle shafts. So you may run into a problem with that also running a lifted knuckle on a non knucike lift kit.

I have an old trail master kit for sale that uses a spacer above the knuckle for the upper control arm hole. So technically it's making the stock knuckle longer, and that kit doesn't widen the track width.
 

Casey1104

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If I'm understanding your question correctly, no you can't. The knuckle lifts leave the upper control arms in stock location and move everything else down leaving the knuckle 4-6" longer than the stock one to make up the space. Where non knuckle lifts have brackets to move everything plus upper control arms down. You could possibly use a 6" knuckle by putting the upper control arms back in stock location and then use the longer 6" knuckles. But on my RCD kit it also widens the track width and uses spacers between the differential and front axle shafts. So you may run into a problem with that also running a lifted knuckle on a non knucike lift kit.

I have an old trail master kit for sale that uses a spacer above the knuckle for the upper control arm hole. So technically it's making the stock knuckle longer, and that kit doesn't widen the track width.
What could i do to fix the problem from cranking up the front end up more to level my truck out?
 

1999gmc

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A smaller block in the rear to lower the rear? Or are the tires to big and rub and thats why you need the torsion bars cranked?
 

Casey1104

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A smaller block in the rear to lower the rear? Or are the tires to big and rub and thats why you need the torsion bars cranked?
No, I just want to crank up my front end but the left side lifts up less than the right side trying to fix that.
 

1BigCarrot

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. . . no you can't.
I disagree, and I say, yes you can because I simply did just that what the OP is asking.


I had a rancho 6" lift already on the truck when I bought it. Due to compliance laws here, I cannot use a modified steering link, so I removed it. I installed the later model 6" lifted BDS knuckles and their UCA's (as they are slightly shorter than stock, which brings your wheel back into spec for wheel alignment otherwise you will run way too much positive camber) which enabled me to install the bigger brake setup that the GMT800 uses.


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1999gmc

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Read my whole response. You can't add a 6" raised spindle to a lift that has dropped upper control arms. I told him he may be able to do it if he put his control arms back in the stock locations, like yours are in the pic. But may run into problems with wider track knuckle lifts(RCD).
 
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I disagree, and I say, yes you can because I simply did just that what the OP is asking.


I had a rancho 6" lift already on the truck when I bought it. Due to compliance laws here, I cannot use a modified steering link, so I removed it. I installed the later model 6" lifted BDS knuckles and their UCA's (as they are slightly shorter than stock, which brings your wheel back into spec for wheel alignment otherwise you will run way too much positive camber) which enabled me to install the bigger brake setup that the GMT800 uses.


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holdddddddd up.... you removed the upper drop bracket, supplemented in lift knuckles from BDS to your rancho kit? This is exactly what I’ve been trying to see achieved and want to do with my god awful Rough Country kit. And BDS would be the easiest ones to use with no track width added. She had godawful angles up front, and the alignment is never right. Mind you, it’s 40s on 24s lol, but if I can get my hands on the knuckles I can get this thing back to 99-100%

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