Just installed the 4” bds radius arm lift on my 2022. Everything seemed fine until today when I got on the highway. Have a drive line vibration at around 65-70 mph. I’m almost 100% it’s from the drive shaft. Here’s my issue. On these trucks it seems all of the rear lifting blocks are tapered. Even the BDS kit for the 2017-2019. But in 2020, they started shipping with a straight 4.5” block, no taper. Looking at other kits for the current year. Rear blocks are all listed as tapered. What am I missing here. Why does bds send these new block with no taper. Called them today and didn’t get much help. Going to try again Monday. Anybody else have these issues. Debating to just order some rear blocks from a different manufacturer.

I have the regular bed with the one piece driveshaft

 

blocks should absolutely be tapered, especially at that height.
the stock blocks are tapered.

i had a driveline groan upon deceleration at 69-70 mph after installing a 2" flat block from a very well known/respected manufacturer.
after reinstalling the factory tapered block, the groan was gone.
ended up getting another block with 2.5* taper from another manufacturer and they have been perfect

 

Altering the ds angle will absolutely cause issues like that.

 

that’s exactly what I just did. Put the factory blocks back in. Now the truck has that Cali lean. Lol. Need find some blocks fast. Who did you needed up getting your blocks from?

 

remember 20yr ago every truck was nose down like it was about to do some work then the sqautty prerunner look got popular and every truck on the road now is nose up

 

Stock trucks, as long as I can remember, have been nose down. That hasn't changed. Lifted trucks however, going back to the 80's, were level if not rear low in these parts. I have noticed the amount of *** sag has become more extreme over the years. The "Carolina Squat" is rediculas.

 

Here's an option, although I imagine there must be a lower cost alternative.
https://www.pmfsuspension.com/2017-2...cks_p_173.html

 

thanks. Might give them a call Monday. These flat blocks from bds are 4.5” and the truck sat perfect. Others I’ve seen online are 4” or 5”. Anyone know what the taper is off hand?

 

PMF Suspension
Call them, the will give you their suggested * as well for what ever height

 

add a spacer to the carrier bearing

I have a 5" lift with no tapered block and I added a spacer that is almost 1" thick.

 

Following as I am looking to order my 4'' kit this week or next

Looking at the 4'' BDS or ZONE kit as well

 

Did you call them back? They make quality kits, would be surprised if they did not make it right for you. I have a 2020 with the BDS 4" and it is perfect.

 

Beautiful truck!!!
yep, gave them a call and they only make flat blocks for the 2020+. Which from what I’ve read is fine for the long bed but the short beds require a 2.5* taper block. Crazy part is that the 2017-2019 kit from them comes with tapered blocks. Oh well. Ended up ordering a set from PMF and they should be here tomorrow

 

hey. I’m having same issue. Did the PMF tapered blocks fox the issue ??

 

did the PMF blocks end up fixing the problem.
Having the same issue with my 2022 f250