ClevelandCruiser
Registered Member
So heres my shackle angle doesnt really look steep enough but i think i will wait and drive it around before i try adjusting it. this is with 63 inch springs. What do you guys think?
CK5
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Shackle Angle at 35*
- Thread starter ClevelandCruiser
- Start date
How flat are the springs with weight on them?
Post another pic from further back.... if the springs are already flat it probably doesn't matter much. Bump or droop is going to pull the shackle "in" from that position, not push it further out.
Post another pic from further back.... if the springs are already flat it probably doesn't matter much. Bump or droop is going to pull the shackle "in" from that position, not push it further out.
Stomis
Professional Amateur
Yikes. Hangar needs to go back a good 6-10in
chevysmithz71
1/2 ton status
X2 or move the front hanger
I'm not so sure... that photo shows a pretty flat spring with that setup. It would be good to see if it truly is.
If the spring IS flat, there is no way the shackle would ever move further back than it is in that photo, and type of suspension motion (either bump or droop) would only make the angle BETTER than the angle shown.
It looks like you didn't modify the frame, so now the shackle hanger doesn't sit flat to the frame. Also, what length shackle are you using?
George_Pimpdaddy
1/2 ton status
did you already move the front hanger forward? if not its time to do that..
Stomis
Professional Amateur
Ummm I'm no expert but when i was reading around to build my solid axle toyota all the rock crawler gurus said a 25-30* shackle angle \ in that direction. Whether the spring is flat or not doesnt make a difference when figuring the proper angle.
Sure if you leave it like that you'll have tons of room for droop but you'll never need it. Thats why theres an ideal angle, otherwise everyone would be running around guestimating whether they are gonna droop or compress more.
That makes no sense. When that spring bumps or compresses what ever you want to call it that angle is not going to get any better. In fact the angle is so bad that I wouldnt be surprised if the spring bottomed out on the hangar and stretched the spring when it flexed good.
I mean when it droops it will get better but it will still be crap vs where it should be. When a spring compresses the shackle pivots towards the rear of the vehicle and vice versa for droop.
Sure if you leave it like that you'll have tons of room for droop but you'll never need it. Thats why theres an ideal angle, otherwise everyone would be running around guestimating whether they are gonna droop or compress more.
I'm not so sure... that photo shows a pretty flat spring with that setup. It would be good to see if it truly is.
If the spring IS flat, there is no way the shackle would ever move further back than it is in that photo, and type of suspension motion (either bump or droop) would only make the angle BETTER than the angle shown.
That makes no sense. When that spring bumps or compresses what ever you want to call it that angle is not going to get any better. In fact the angle is so bad that I wouldnt be surprised if the spring bottomed out on the hangar and stretched the spring when it flexed good.
I mean when it droops it will get better but it will still be crap vs where it should be. When a spring compresses the shackle pivots towards the rear of the vehicle and vice versa for droop.
ClevelandCruiser
Registered Member
im out of town right now so i cant post another pic but i compressed the springs completly flat before i mounted it to make sure it wouldnt bottom out. and no i havent moved the front hanger at all.
If the spring is truly flat then any arching of the spring will cause the eye to eye distance of the spring to decrease. Hence pulling the shackle forward in compression and extension. I know a couple guys with shackle angles that steep in the real world it doesn't seem to matter much. All of the guys I have seen with the shackle that steep run very little up travel. If your wheel base is where you want it and your lift height I would leave it alone. If you are a little low in the rear or want to change your wheelbase then modify it.
I like about 20* shackle angles \ like that pretty much
I like about 20* shackle angles \ like that pretty much
Stomis
Professional Amateur
Spend a little more time thinking about it, I'm sure it will eventually.
I dont see how the suspension cycling two different ways could ever make the shackle move the same way. Explain it if I'm wrong I can swallow my pride.
I'm just saying the shackles on my truck pivot forward when you droop and back when you compress. I dont see how it could ever be any different.
No matter what that hangar needs to go back reguardless of what anyones mothers brothers dogs buddys uncle runs. Proper shackle angle is pitched this way: / off the frame at 20-30* when looking at the truck from passengers side.
the spring negatively arches bringing the shackle back just like it would if it was drooping.
A flat spring can't get any longer than it already is.
The reason a shackle can move backwards is when the effective length of the spring (distance between the springeyes) is increasing. A flat spring will only get shorter with either uptravel or droop.
The reason a shackle can move backwards is when the effective length of the spring (distance between the springeyes) is increasing. A flat spring will only get shorter with either uptravel or droop.
Stomis
Professional Amateur
O super so now we're letting are springs negativly arch? Thats even dumber than leaving the shackle angle like that....
Asked and answered.
This guy won't get better flex by changing his shackle angle....just more lift.
This guy won't get better flex by changing his shackle angle....just more lift.
Stomis
Professional Amateur
Asked and answered.
This guy won't get better flex by changing his shackle angle....just more lift.
Then why do marlin crawler, trail gear, and every person online that I've read say that there is infact and ideal shackle angle for the most amount of flex?
I'm not trying to be a dick just seriously wondering why if shackle angle doesnt matter then why do experts say it does?
ther is an ideal one where its perfect for that particular truck, his shackle can not get any worse so its at the limit and right where it will work allright.
I have changed my shackle angle a couple of times, the shorter the spring the more important it is. I changed my angle (as the result of a trail fix) from about 25* to about 5* back. It made very little difference in overall flex
Stomis
Professional Amateur
Well I guess I'll stop worrying about moving my shackle flip forward an inch and a half for that perfect shackle angle.
