U Code Springs with PMF RSK - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 62 (permalink) Old 05-24-2013, 10:24 PM Thread Starter
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U Code Springs with PMF RSK

I am swapping a 96 Dana 60 under my 97 F-250 soon and I would like to achieve a smoother ride while getting minimal lift.
I was wondering if anyone has done U Code (excursion diesel springs) with a 2.25 PMF rsk? Pictures and opinions are appreciated. Thanks!

John
1997 f-250 PSD, CC, SB, 4x4, 3.55s, Dana 60, PMF 2.25" RSK w/ U codes, 315/75/16 Terra Grapplers, RifRaff6637, 3" DP, 4" Diamond Eye, Rosewood 1s, PHP Tuned, EATC, Explorer Wheel w/ SWCs, & More
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post #2 of 62 (permalink) Old 05-24-2013, 10:34 PM
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Re: U Code Springs with PMF RSK

I have them in my CCLB w B code rear, but it is a 460 truck.

I will say it ride a TON better than my CCSB with V and B codes

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post #3 of 62 (permalink) Old 05-25-2013, 01:54 AM Thread Starter
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Re: U Code Springs with PMF RSK

From what ive experienced the diesel 4x4 excursion rode rather well with the U code leafs. Aside from bottoming out on the bump stops. But i'd anticipate them doing well on a truck with more clearance.
Now i know the excursion 4x4 sits about 1 3/4" lower than a 4x4 pickup.
How much lower would you say your 460 truck is from the CCSBD?
Is there any issues with shackle angles or anything of the like with a negatively arched spring?

John
1997 f-250 PSD, CC, SB, 4x4, 3.55s, Dana 60, PMF 2.25" RSK w/ U codes, 315/75/16 Terra Grapplers, RifRaff6637, 3" DP, 4" Diamond Eye, Rosewood 1s, PHP Tuned, EATC, Explorer Wheel w/ SWCs, & More
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post #4 of 62 (permalink) Old 05-25-2013, 12:39 PM
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Re: U Code Springs with PMF RSK

Quote:
Originally Posted by 97Beast View Post
From what ive experienced the diesel 4x4 excursion rode rather well with the U code leafs. Aside from bottoming out on the bump stops. But i'd anticipate them doing well on a truck with more clearance.
Now i know the excursion 4x4 sits about 1 3/4" lower than a 4x4 pickup.
How much lower would you say your 460 truck is from the CCSBD?
Is there any issues with shackle angles or anything of the like with a negatively arched spring?
My CCLB sits about 1/2" lower than the CCSB. But the 460 is about 200lbs lighter than the PSD. With that said, i want to swap out U codes for the V codes in the CCSB

Looking for Blue 40-20-40 seat for OBS. PM me if any known
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post #5 of 62 (permalink) Old 05-25-2013, 02:17 PM
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Re: U Code Springs with PMF RSK

Do you know how has the best risk to use? I am getting a 85 f-350 with a d60/4:10's. Is there anything else I should keep other then the front axle parts?

96 with 320,000, Idm mod,
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Pmf 2.25 rsk sd springs

78 f-150 turbo big block
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post #6 of 62 (permalink) Old 05-25-2013, 02:24 PM
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Re: U Code Springs with PMF RSK

Quote:
Originally Posted by diesel_brad View Post
My CCLB sits about 1/2" lower than the CCSB. But the 460 is about 200lbs lighter than the PSD. With that said, i want to swap out U codes for the V codes in the CCSB
I would be interested to hear how that works out brad. How much do you think wheel base has to do with it?

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Banks Intercooler, Reflexxions Cowl Hood, 17 degree HPOP, 4" Stainless Magnaflow &
Aeroturbine exhaust, Aeroforce OBD Scan Gauge, Truxedo tonneau cover
Dana 60 Precision Metal Fab RSK and SD Springs
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post #7 of 62 (permalink) Old 05-25-2013, 05:04 PM
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Re: U Code Springs with PMF RSK

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Originally Posted by Tom S View Post
I would be interested to hear how that works out brad. How much do you think wheel base has to do with it?
I'm not sure. Between the different springs, 16" of wheel base difference and the dually tires, I say they all play a part in the ride difference

Looking for Blue 40-20-40 seat for OBS. PM me if any known
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post #8 of 62 (permalink) Old 05-26-2013, 01:59 AM
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Re: U Code Springs with PMF RSK

I would also be interested in the results you guys have by going with U codes up front. While the RSK w/ V codes is an improvement over the stock springs and mounting, my RC still seems stiff. I think I could live with a little less lift up front and going back to 285's.

Matt
97 F350 Reg Cab 4x4 PSD/E4OD
87 F250 Reg Cab 4x4 6.9/C-6

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post #9 of 62 (permalink) Old 05-26-2013, 02:55 AM
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Re: U Code Springs with PMF RSK

This is interesting I thought the v codes where the way to go! im so confused. What did the u codes come on?

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post #10 of 62 (permalink) Old 05-26-2013, 03:22 AM
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Re: U Code Springs with PMF RSK

Quote:
Originally Posted by old Smokey View Post
Do you know how has the best risk to use? I am getting a 85 f-350 with a d60/4:10's. Is there anything else I should keep other then the front axle parts?
You may want the F-350 steering Pitman arm. These are no longer available from the dealer.
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