shackle flip on a 75
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Junior User
Joined: Dec 2003
Posts: 83
Likes: 0
From: hillsboro OR
shackle flip on a 75
so i just added a 4 inch lift to the front of my truck and am now on the rear. I was thinking about just doing a shackle flip and seeing where that got me. I was doing a shackle flip with a buddy on his truck and it did not seem that easy because we needed to move the shackle forward and drill new holes. I was wondering do you always have to drill new holes are have some of you guys just been able to flip it and and bolt it in the old rivit holes. thanks for your help 
Senior User
Joined: May 2004
Posts: 386
Likes: 0
On my 1979 F-250 4x4 that i recently traded to my brother,we just flipped it and put it in the same holes...just used Grade 8 bolts and all seemed to be fine...it might take a little pressure and a strong bar to get it down far enough to get it back in those holes,but it will work..
Post Fiend
Joined: Jul 2003
Posts: 11,945
Likes: 3
From: Spokane, WA
The reason it's best to move the bracket forward and drill new holes is because it gives you a more favorable shacke angle which in turn means a better ride. It's not necessary to do though. If you do the flip with the same holes you'll have a 0 degree angle like this:
https://www.ford-trucks.com/user_gal.../60158.520.390
It can make for a jarring ride. Ideally you want your shackle angle about like this:
https://www.ford-trucks.com/user_gal.../60156.520.390
What I suggest to most people is to just go ahead and do the flip using the rivet holes. Ride on that for a while and see how it feels. If it's too bumpy and jarring then drill new holes and move the bracket about 2" forward. Either way it's not much work. The drilling will take less than 5 minutes per side.
https://www.ford-trucks.com/user_gal.../60158.520.390
It can make for a jarring ride. Ideally you want your shackle angle about like this:
https://www.ford-trucks.com/user_gal.../60156.520.390
What I suggest to most people is to just go ahead and do the flip using the rivet holes. Ride on that for a while and see how it feels. If it's too bumpy and jarring then drill new holes and move the bracket about 2" forward. Either way it's not much work. The drilling will take less than 5 minutes per side.
