How many B code rear spring guys do we have?

Tom S · Jul 10, 2011

I have them on mine and thought it was worth it. Hoping to really enjoy a nice ride with the Dana 60 and the V codes up front.

smokedout250 · Jul 10, 2011

What's the difference? Im looking at doing somee new springs in the rear if I could ever find a d60 worth getting...

rusty1161 · Jul 10, 2011

i have them with RSK/V codes up front. Much better than the worn out springs/bushing.

Rusty

Tom S · Jul 10, 2011

smokedout250 said:
What's the difference? Im looking at doing somee new springs in the rear if I could ever find a d60 worth getting...

The have a better ride because they are a different design. More progressive is how I think of it. They are not bad at all to install.

Rodslinger · Jul 11, 2011

Way nicer ride. Well worth the 2 hours of install time.

gnxtc2 · Jul 11, 2011

Some FYI: B's vs F's

Both are variable rate springs. The B's are 320/670 and the F's are 334/776. These numbers are the deflection rate in lbs/inch. The F's have a considerably higher secondary rate, therefore the F spring will not compress as far as the B under the same load. This doesn't necessarily mean that the spring has a higher total capacity. The F has a rating at the pad of 2695 lbs per spring. The B is rated at 2998 lbs per spring. However, the B will sag more.

You make the decision

Billy T.
[email protected]

OBSWIZ · Jul 11, 2011

F will not ride as good as a B code..

Tom S · Jul 11, 2011

I definately think the B codes ride better then my stock F250 springs did.

97powerstroke · Jul 11, 2011

Are these a dealer only item

Tom S · Jul 11, 2011

Dealer is one choice but used off a SD is another. Finding a set taken off to do a lift at low miles would be nice. I can post up more details on doing this if anyone decided they want to do it.

Tom

97powerstroke · Jul 11, 2011

I am interested in doing this when I rip my truck apart in the fall along with a rsk setup

OBSWIZ · Jul 12, 2011

I did this mod years ago..along with the RS SD swap..maybe 11 years now..you need to redrill the front hanger and the rear shackle to SD bolt size..or redrill them and the spring eyes to std grade 8 bolts. i would also get new shackles from Jeffs Bronco graveyard easyer than installing new bushings..notch the inside of the shackle to clear the SD spring leaf..aprox 3/8" or cut some off the spring. I'd also use new U bolts..play it safe.

Strokersace · Jul 12, 2011

I plan on putting some on my dually. You never hear of anyone putting them on a 2wd so I just may. It rides better than a 4x4 anyway but would be nice to have a bit smoother ride.

I gotta head to the salvage yard this afternoon. Is there any coding or anything I need to look for? Anyway to tell if the door/sticker has been removed?

Tom S · Jul 12, 2011

I am pretty sure Kip has a dually 2wd drive and did them

Strokersace · Jul 12, 2011

Guess I'm not sure who Kip is... I was just meaning that most on the forums are putting them in 4x4's.

Any idea on what to look for code wise if the door sticker is missing to find a set in the salvage yard?

Tom S · Jul 12, 2011

I do not know what to tell you on how to figure out a B code with out the door code. The only one I can think of that might know would be Cary T he is really good with that stuff.

Strokersace · Jul 12, 2011

Yeah, I was hoping he'd jump back on here this afternoon. I'm not gonna buy any today, but figured I'd do some looking to see if the salvage yard even had some.

Tom, did you put any different shocks on the rear when you switched to the b codes?

Tom S · Jul 12, 2011

Nope, same yellow Bilstein shocks. I am going to the other series ones from Cary when I add in the F-350 block and do the front.

AZStang · Jul 12, 2011

gnxtc2 said:
Some FYI: B's vs F's

Both are variable rate springs. The B's are 320/670 and the F's are 334/776. These numbers are the deflection rate in lbs/inch. The F's have a considerably higher secondary rate, therefore the F spring will not compress as far as the B under the same load. This doesn't necessarily mean that the spring has a higher total capacity. The F has a rating at the pad of 2695 lbs per spring. The B is rated at 2998 lbs per spring. However, the B will sag more.

You make the decision

Billy T.
[email protected]