different f350 blocks?
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Senior User
Joined: Mar 2006
Posts: 350
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From: Frankford, NJ
different f350 blocks?
i'm probably going to put a leveling kit in my 05, so to really level it out, i'm gonna add an f350 4" block in the rear. i'm getting them direct from ford because we have an account with them. when we called up to get a price, they asked me for the vin#, which i obviously didn't have, because they said 3 different types of blocks are listed. How can they be different?
Posting Guru
Joined: Nov 2006
Posts: 1,296
Likes: 1
From: muskegon mi.
are the drive shafts the same??? they need the vin to get the right angle on the u-joint
Postmaster
Joined: Mar 2007
Posts: 2,612
Likes: 2
From: Dunwoody, GA
From what I've gathered for a How-To I wrote a while back:
If you have one of the following:
Crew Cab Short Bed (156" Wheelbase)
Super Cab Long Bed (158" Wheelbase)
Crew Cab Long Bed (172" Wheelbase)
Then use these part #s:
Blocks: F81Z559
A x 2
U-Bolts: N803770S436 x 4
Nuts: N620485S441 x 8 (You can reuse the old nuts if you wish.)
If you have one of the following:
Super Cab Short Bed (142" Wheelbase)
Regular Cab Long Bed (137" Wheelbase)
Then use these part #s:
Left Tapered Block: F81Z5598FA x 1
Right Tapered Block: F81Z5598GA x 1
U-bolts: 5C3Z5705AA x 4
Nuts: N620485S441 x 8 (You can reuse the old nuts if you wish.)
If you want to shim the drive shaft:
3 1/4" Shims: EOTZ4A209A x 1 (Comes with 3 1/4" shims. If you use more than 1 shim, you will need longer bolts. Most people only use 1 shim.)
If you have one of the following:
Crew Cab Short Bed (156" Wheelbase)
Super Cab Long Bed (158" Wheelbase)
Crew Cab Long Bed (172" Wheelbase)
Then use these part #s:
Blocks: F81Z559
A x 2 U-Bolts: N803770S436 x 4
Nuts: N620485S441 x 8 (You can reuse the old nuts if you wish.)
If you have one of the following:
Super Cab Short Bed (142" Wheelbase)
Regular Cab Long Bed (137" Wheelbase)
Then use these part #s:
Left Tapered Block: F81Z5598FA x 1
Right Tapered Block: F81Z5598GA x 1
U-bolts: 5C3Z5705AA x 4
Nuts: N620485S441 x 8 (You can reuse the old nuts if you wish.)
If you want to shim the drive shaft:
3 1/4" Shims: EOTZ4A209A x 1 (Comes with 3 1/4" shims. If you use more than 1 shim, you will need longer bolts. Most people only use 1 shim.)
Fleet Mechanic
Joined: Apr 2007
Posts: 1,433
Likes: 7
From: NH
You should shim the driveshaft and also add a track bar drop bracket. Check out Readylift for there complete leveling kits. They have the drop bracket/carrier shim/bump extensions as well as the rear block kits.
2005-2009 Ford F250 Super Duty 4wd 2.5" ReadyLift Leveling Kit system
2005-2009 Ford F250 Super Duty 4wd 2.5" ReadyLift Leveling Kit system
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