Lowering rear end
Mountain Pass
Joined: Jul 2018
Posts: 164
Likes: 20
Just finished installing PMF 1 1/2" 2.5 degree blocks on the rear of my 2018 F250 SWB 6.7 4X4 Lariat. I had previously installed the 2"OEM blocks(no degree angle) and experienced a driveline vibration around 60mph. I now have zero vibration! It's my thought that the rear axle assembly needs the 2.5 degrees to match the angle of the driveshaft coming from the transfer case. I know there are others that had installed the 1 1/2" 2.5 degree blocks and experienced a vibration, but happily that is not so in my case!
The truck really looks good with only 1/2" rake back to front plus it should now fit in most all parking garages even with the 12.50 35"X18" Ridge Grapplers.
VERY PLEASED!
The truck really looks good with only 1/2" rake back to front plus it should now fit in most all parking garages even with the 12.50 35"X18" Ridge Grapplers.
VERY PLEASED!
5th Wheeling
Joined: Aug 2018
Posts: 33
Likes: 0
Just finished installing PMF 1 1/2" 2.5 degree blocks on the rear of my 2018 F250 SWB 6.7 4X4 Lariat. I had previously installed the 2"OEM blocks(no degree angle) and experienced a driveline vibration around 60mph. I now have zero vibration! It's my thought that the rear axle assembly needs the 2.5 degrees to match the angle of the driveshaft coming from the transfer case. I know there are others that had installed the 1 1/2" 2.5 degree blocks and experienced a vibration, but happily that is not so in my case!
The truck really looks good with only 1/2" rake back to front plus it should now fit in most all parking garages even with the 12.50 35"X18" Ridge Grapplers.
VERY PLEASED!
The truck really looks good with only 1/2" rake back to front plus it should now fit in most all parking garages even with the 12.50 35"X18" Ridge Grapplers.
VERY PLEASED!
super helpful Thanks. My parts arrived today.
I assume you you had about a 2 inch tailgate drop?
Tuned
Joined: Nov 2017
Posts: 264
Likes: 3
From: Bend, Oregon
Just finished installing PMF 1 1/2" 2.5 degree blocks on the rear of my 2018 F250 SWB 6.7 4X4 Lariat. I had previously installed the 2"OEM blocks(no degree angle) and experienced a driveline vibration around 60mph. I now have zero vibration! It's my thought that the rear axle assembly needs the 2.5 degrees to match the angle of the driveshaft coming from the transfer case. I know there are others that had installed the 1 1/2" 2.5 degree blocks and experienced a vibration, but happily that is not so in my case!
The truck really looks good with only 1/2" rake back to front plus it should now fit in most all parking garages even with the 12.50 35"X18" Ridge Grapplers.
VERY PLEASED!
The truck really looks good with only 1/2" rake back to front plus it should now fit in most all parking garages even with the 12.50 35"X18" Ridge Grapplers.
VERY PLEASED!
New User
Joined: Aug 2018
Posts: 9
Likes: 0
2018 F350 Platinum Dually
Have an 18 F350 DRW that I would like to lower the back end on a couple of inches (or whatever amount the new blocks give). I read through the thread and it appears as though the DRW trucks need a different block than SRW? What Ford part number should I look for to accomplish this? Can I lower it a couple inches then still use ride rite or firestone airbags for towing or gooseneck?
Tuned
Joined: Dec 2018
Posts: 483
Likes: 24
Update
Found some missing weights on a rear tire. Balanced and rotated tires. Test drove new F250 at the dealership. My truck is smoother than the new truck. I'm gonna keep the 1.5" blocks. There is a slightly different engine buzz feel than the new one, but it's hardly noticeable. Just gonna enjoy the truck now.
I would appreciate any feedback from others with 1.5" blocks to confirm the driveline is smooth. Thanks.
Found some missing weights on a rear tire. Balanced and rotated tires. Test drove new F250 at the dealership. My truck is smoother than the new truck. I'm gonna keep the 1.5" blocks. There is a slightly different engine buzz feel than the new one, but it's hardly noticeable. Just gonna enjoy the truck now.
I would appreciate any feedback from others with 1.5" blocks to confirm the driveline is smooth. Thanks.
Tuned
Joined: Dec 2018
Posts: 483
Likes: 24
Did you use the PMF 1" blocks 2.5*?
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New User
Joined: Jan 2019
Posts: 5
Likes: 0
Rear blocks
Can you send me Vin for your truck? I found in airlift manual for installing rear bags they had two different trucks in pictures. One was a 18 350 dually with shorter blocks other was like mine. I want to lower rear of my 250 with those blocks but I can't get part number without Vin. I'm going to use airbags to keep truck level when I have my 5th wheel hooked up.