Full Leaf springs of Traction Blocks?

[w3bb3r04]

So I put a RC 4.5" lift on the truck about a month ago and have terrible axle wrap now, just running an SPD MPD tune. Im also Running RC drop carrier bearing bracket. I feel like Im getting wrap and vibration on initial take off and some on harder shifts. Need opinions on which route to go. The truck is a daily driver with some occasional pulling under 10k pounds.

Option A: Rear lift leaf springs. Not sure what brand I would go for? (Procomp, BDS, ICON, etc). Would be considering a 6" leaf spring with no block or a 4-5" with a small block.

Option B. PMF Fabricated rear blocks. (Current blocks have taper. I read that 2 piece driveshafts need flat blocks? Would be 6" blocks)

Option C. PMF Traction Blocks. Would be bolt on with the 6" blocks.

I have done quite a bit of reading but not really sure which route to go. Don't see a whole lot of complaints out of Icon Lifts with 6" rear blocks so Im not sure if the block is my problem or what.

 

[Layson]

You should call icon and see what they say about their rear leaf setup and how they deal with axle wrap.

 

[w3bb3r04]

You should call icon and see what they say about their rear leaf setup and how they deal with axle wrap.

Is there a reason that even the stage 4 4.5" kits come with blocks? I would think for $7000 it would come with full leafs unless they feel like wrap is not an issue.

 

[sootie]

pmf bolt on traction bars. done.

 

[w3bb3r04]

pmf bolt on traction bars. done.

I'm guessing it would be worth the extra $130 to have the block with that set up as well for added strength.

 

[sootie]

yes

 

[w3bb3r04]

What is the preference on tapered blocks for a 6" block. I have seen a little bit of info on everything. PMF offers flat, 2.5 degree, and 5 degree taper.

 

[sootie]

it all depends on the drive line angles on your particular truck.

 

[w3bb3r04]

it all depends on the drive line angles on your particular truck.

Is the idea to have as straight of an angle as possible at the u joints?

 

[sootie]

no. and i'm not smart enought to start explaining suspension geometry. it has to do with trans angle, pinion angle and overall driveline angle.

 

[w3bb3r04]

no. and i'm not smart enought to start explaining suspension geometry. it has to do with trans angle, pinion angle and overall driveline angle.

LOL I gotcha. Ive done some reading about the pinion angles on mustangs before but Im sure it is similar on these trucks just different numbers. Ill go do some reading I guess!!