What is a RSK?

[Joe0816]

I've seen people mention rsk on here. What is it, what does it do, and what does it stand for?

[Diesel_brad]

Reverse Shackle Kit.

On the OBS, Ford got REALLY stupid and put the shackle in FRONT of the spring.
the CORRECT location is BEHIND the spring.

a RSK moves the shackle to behind the spring. It corrects the ride and give a lil lift in the process

[m j]

it is a "shackle reversal" everywhere else but in powerstroke land they call it an RSK.
dunno why but I assume someone's marketing ploy

[m j]

Originally Posted by Diesel_brad

Reverse Shackle Kit.

On the OBS, Ford got REALLY stupid and put the shackle in FRONT of the spring.
the CORRECT location is BEHIND the spring.

a RSK moves the shackle to behind the spring. It corrects the ride and give a lil lift in the process

there are reasons to locate the shackle in the front. with the factory, flat or neg arc, springs the front makes a lot of sense.

[CT Performance, Inc.]

I developed the RS-SD mod using SD springs and a RS kit 12-13 years ago, but it Requires a D60 swap. We have helped thousands perform this mod. It will transform a OBS trucks ride. Actually can ride better than any stock SD



We also developed the 99-10 axle swaps with suspension for the OBS.

PM me if I can help.

[Diesel_brad]

Originally Posted by m j

there are reasons to locate the shackle in the front. with the factory, flat or neg arc, springs the front makes a lot of sense.

Then why do the SD(with flat springs) have the shackle in the rear?