rattlecan78
03-05-2010, 05:30 AM
has anyone on here ran an inverted shackle like whats on the back of any newer chevy truck? I ask because to get the front end of my sami a little lower and bring my pinion up to an acceptable level I think I'M gonna run that style setup in the front. wondering on pro's and con's, I can't seem to find very much info it seems the full size crowd always goes shackle reversal to get some lift but I never here any comments on how it works as is.
I thought it would also be nice to have the end of my spring up past the bottom of my frame so when backing up there is nothing to hang up on...straight from frame,to spring,to tire...I don't know what to yall think
nacho38
03-05-2010, 10:25 AM
There are a ton of shackle reversal setups on here. Most are running the YJ springs. Have a look at the build threads sticky for some examples.
Hope Springs Hauler
03-05-2010, 10:51 AM
He is not just talking about putting the shackle at the rear of the spring, he is asking about having the spring at the top of the shackleand the hanger at the bottom.
I haven't had a problem with it like that on my truck, but I might be concerned about the bracket trying to rip off of the frame since sami frames seem to be very thin. Also, check for vertical clearance, the shackle mount might need to be where a body mount is or it might interfere with the floor pan.
If you intend to go forward with this, I would try to find a way to limit shackle travel so that it doesn't go much below horizontal to prevent "inversion."
rattlecan78
03-05-2010, 11:13 AM
I have the frame plated with 1/8 inch plate and the front body mount is already removed. I was planning on hanging my shackle off the bottom of my rocker/slider but that required a huge hole in my floor to get my mount up high enough this way I will still have a hole in the floor but much smaller to give my spring room to move. I had wondered about shackle inversion also, it wouldn't be a big deal to make my shackle to keep that at bay.
also the mount will be tied into the cage on the outside edge and welded to the frame on the inside so it should have plenty of support. I'm gonna build my rocker/slider out of 2x3 1/8 wall rectangular tubing.
rattlecan78
03-07-2010, 08:19 PM
no one has any thoughts on this?
I'll get some pics up as soon as I get it done, just gotta fix my welder.
raging squirrel
03-08-2010, 10:27 AM
i think it's a good idea. can't see any real problem with it. the angle of the springs will affect how much the driveshaft collapses and extends, but that's all i can think of to watch right now.
How wide of an axle are you running? The problem I see is the tire hitting the spring when it turns. I know most already have issues with tires hitting springs with it under the frame rails. Outboard it to get it on the side of the frame, and you lose more space.
rattlecan78
03-08-2010, 12:25 PM
I'm running d60 front and 14 bolt rear, full width with H1 wheels I'm good on spring clearance.
what do you think as far as shackle angle? I was thinkin near vertical or leaned back a little but not quite sure what to do there.
Baratacus
03-08-2010, 01:18 PM
if you're changing the pinion angle of the differential, you need to change the angle of the transfer case. Keep the pinion at the same angle when you lift it so you don't mess up your drivetrain geometry.
rattlecan78
03-08-2010, 04:18 PM
I'm not trying to raise the pinion angle because it is so high, only because I screwed up when I measured my front spring mount and thought my rear spring eye would be further forward than it is,and therefore mounted higher on the frame.
so since I screwed up my pinion angle is only at 2 degrees or so, I just wanna get it up to 8 or 9.
I also like the idea that the end of my spring will be above the bottom of the frame, so it won't get hung up on anything it should slide straight from frame to spring to tire.