Rear lowering shackles - prior gen fit 2021?

[graywhiteboy]

Do you know what your measurements were prior to the install? I’m thinking of doing this and raising front an inch to make level- also have a 2wd stx but I have the 18” wheels and sits super low in front- going to be changing to 20” fuel wheels- want the leveled off-road look without killing mpg and keep it easy to get in and out of.

The photos show the before and after measurements.

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[nubbles]

Anyone try Ford performance # M-3000-H4A ? Possibly fit since the rear 15-19 shackles work..
https://www.steeda.com/ford-performance-m-3000-h4a-f-150-complete-suspension-lowering-kit

I thought I read that the struts were interchangeable, if that is true then it seems like the springs may be as well. I'm not all that interested in the shackle, but I would like to know if the spring works.

 

[SpaceWhiteF150]

How did you tint your taillights?

 

[SpaceWhiteF150]

This posted 2 weeks ago 3/5 drop on a 21

How did you tint your taillights?

 

[Rockman5159]

Hi! Anyone know if the rear lowering shackles from the previous gen (2015-2020) fit the 2021s? Thanks!

According to what I understand the 2021s are different. My friend tried a set for a 2020 and they wouldnt fit. I had a 2020 f150 FX4 anddid remove the block under the spring and it had absolutley no affect on drivetrain geometry.The 2wd 2015-2020 did not have the block. On my 2020 FX4 it lowered it the exact height of the block. I didnt even have to get shorter bolts.The oem bolts were threaded enough.The 2021 F150 FX4 that I got yesterday hjas what they call a mono-leaf system on the rear were the 2015-2020s had a multi leaf setup. The block on the rear of my 2021 FX4 appears to only 1 1/2" where my 2020 had a 2" block. With just a 1 1/2" drop. If you remove this block you should get an actual 1 1/2 drop without any complication or shimming. I plan to remove mine tommorrow and the oem U bolts also appear to be threaded enough to make uop the difference.The F150s WITH the towing package, have a stiffer mono-leaf spring as opposed to standard spring giving it more arch therefore a higher lift in the rear

 

[Rockman5159]

According to what I understand the 2021s are different. My friend tried a set for a 2020 and they wouldnt fit. I had a 2020 f150 FX4 anddid remove the block under the spring and it had absolutley no affect on drivetrain geometry.The 2wd 2015-2020 did not have the block. On my 2020 FX4 it lowered it the exact height of the block. I didnt even have to get shorter bolts.The oem bolts were threaded enough.The 2021 F150 FX4 that I got yesterday hjas what they call a mono-leaf system on the rear were the 2015-2020s had a multi leaf setup. The block on the rear of my 2021 FX4 appears to only 1 1/2" where my 2020 had a 2" block. With just a 1 1/2" drop. If you remove this block you should get an actual 1 1/2 drop without any complication or shimming. I plan to remove mine tommorrow and the oem U bolts also appear to be threaded enough to make uop the difference.The F150s WITH the towing package, have a stiffer mono-leaf spring as opposed to standard spring giving it more arch therefore a higher lift in the rear

anything more than 3 inches up or down requires shimming of Diff

 

[Rockman5159]

anything more than 3 inches up or down requires shimming of Diff

I removed the 1.5" blocks on my 2021 FX4 today lowered exactly 1.5" on the rear and it actually raised the front about 3/4".I had plent of threads on my existing u-bolts. it worked out really well. there is also a company that I found that makes the 2" lowering shackles for a 2021 and 2022 F150. MAX TRAX Suspension store. they are $93.75 per pair and readily available

 

[RedundanT]

According to what I understand the 2021s are different. My friend tried a set for a 2020 and they wouldnt fit. I had a 2020 f150 FX4 anddid remove the block under the spring and it had absolutley no affect on drivetrain geometry.The 2wd 2015-2020 did not have the block. On my 2020 FX4 it lowered it the exact height of the block. I didnt even have to get shorter bolts.The oem bolts were threaded enough.The 2021 F150 FX4 that I got yesterday hjas what they call a mono-leaf system on the rear were the 2015-2020s had a multi leaf setup. The block on the rear of my 2021 FX4 appears to only 1 1/2" where my 2020 had a 2" block. With just a 1 1/2" drop. If you remove this block you should get an actual 1 1/2 drop without any complication or shimming. I plan to remove mine tommorrow and the oem U bolts also appear to be threaded enough to make uop the difference.The F150s WITH the towing package, have a stiffer mono-leaf spring as opposed to standard spring giving it more arch therefore a higher lift in the rear

I used ebay Crown 2" shackles and they fit fine, with trimming of the bed support for clearance. Left the blocks in mine till I get some 2.5 degree shims since the block appears to be tapered.

 

[Rockman5159]

I used ebay Crown 2" shackles and they fit fine, with trimming of the bed support for clearance. Left the blocks in mine till I get some 2.5 degree shims since the block appears to be tapered.

i have some shims as well gonna put then in tomm

 

[Efrommel]

Are the ford performance available for the 2021? or are the same for the 2020?

 

[cashton]

Alas! Finally found and installed the 2015-2021 Ford F-150 2wd/4wd 1.5-2" Rear Lowering Shackles - PRS-413710. Easy install. Looks great. I do feel the front end a little light while driving but something I'll get used to. Also, I will need to adjust the headlight down a bit...

Did the shackles lower the rear 1.5 or 2 inches?

 

[HSV_MIkeJ]

From looking at my 2021 and from what I have read, using the 2" drop shackles on a 2021/22 would require cutting into the bed support brace, since the leaf spring would hit it.

 

[RedundanT]

Had to trim a little for my Crown 2" nit that bug of a deal.

 

[Alex_Bo]

Did the shackles lower the rear 1.5 or 2 inches?

Who knows. I didn't measure. Besides, 1/2" is almost indecipherable.

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