CPP Lowering Blocks

[C10Slim]

Does anyone know if CCP lowering blocks are wedged to create proper pinion angle? I put mine in late last night and looks like the pinion is awfully high. I was thinking maybe I didn’t pay attention and put them in wrong? It's either that or I need to find some wedges to correct it.

[SCOTI]

Originally Posted by C10Slim

Does anyone know if CCP lowering blocks are wedged to create proper pinion angle? I put mine in late last night and looks like the pinion is awfully high. I was thinking maybe I didn’t pay attention and put them in wrong? It's either that or I need to find some wedges to correct it.

The CPP blocks are not wedged. There are 'pinion shims' available for truck arms if necessary..... www.stockcarproducts.com. Look under Rear Suspension; truck arm spring mounting parts.

[C10Slim]

Awesome thanks for the quick reply SCOTI!

[dznucks]

Mine are supposed to be here today and i ws going to throw them in this weekend.

Are pinion shims needed? i thought i read that they were not needed.

I have the CPP drop xmember and i am going to use 1.5" cpp blocks.

[C10Slim]

I have the CCP drop member and the 2" blocks and the angle is defiantly off.

Now I am thinking I should have gone with the 1 1/2" blocks because of the scrub line, anyone want to trade blocks?

[kev2809]

do all trucks need pinion shims?

[SCOTI]

No. Not all trucks need them. My 68 swb w/bags & 1.5" blocks didn't use them & I logged 5+yrs of daily use (6K a year min) w/o issue.

[kev2809]

you basically you wont know until you get the blocks in and drive it around?

[dznucks]

kev...thats the scary part.


i ordered the 1.5" blocks. they were a no show today, no brown truck.

the cpp drop member raised the front of the trailing arms, changing the angle of the rearend. how much i dont know...i dont guess the blocks would change that angle, it would just change the height difference from the tranny output shaft.

[dznucks]

damn there aint nothing but texans on this thread.

i'll be in fort worth tuesday for work, austin/dripping springs for the weekend.

[kev2809]

Originally Posted by dznucks

kev...thats the scary part.


i ordered the 1.5" blocks. they were a no show today, no brown truck.

the cpp drop member raised the front of the trailing arms, changing the angle of the rearend. how much i dont know...i dont guess the blocks would change that angle, it would just change the height difference from the tranny output shaft.

hmm, im just gonna run blocks, no drop member for me. i guess ill have to wait and see i guess

Originally Posted by dznucks

damn there aint nothing but texans on this thread.

lol, i didnt even notice that. there seems to be a lot of us texans on this board

[VA72C10]

You can correct the angle by flipping the mounts on the factory crossmember, or better yet, if you're bagging the truck, flip the entire trailing arm crossmember...that will flip the mounts and flip the carrier bearing (lwb)

[SCOTI]

Originally Posted by VA72C10

You can correct the angle by flipping the mounts on the factory crossmember, or better yet, if you're bagging the truck, flip the entire trailing arm crossmember...that will flip the mounts and flip the carrier bearing (lwb)

There's not really a need for this. I had 2600#/7" bags bolted directly to the truck arm & frame on a swb (1pc driveshaft), 1.5" CPP blocks & used every milimeter of a CPP bolt-in notch. The factory truck arm crossmember was untouched nor did I use pinion shims in over 5yrs of daily use.....

Put it together & see what it needs before you create an issue that doesn't exist.

[chevydog66]

I had to shim my 72 GMC lb after installing 2" blocks about 6*.

[VA72C10]

Originally Posted by SCOTI

There's not really a need for this. I had 2600#/7" bags bolted directly to the truck arm & frame on a swb (1pc driveshaft), 1.5" CPP blocks & used every milimeter of a CPP bolt-in notch. The factory truck arm crossmember was untouched nor did I use pinion shims in over 5yrs of daily use.....

Put it together & see what it needs before you create an issue that doesn't exist.

Originally Posted by chevydog66

I had to shim my 72 GMC lb after installing 2" blocks about 6*.

Of course it makes sense to measure out for your specific application. I read 1.5" but was thinking 2 or 3" block which is what most have been doing. If I didn't flip my carrier bearing my pinion angle would have been very bad at ride height with the 2" blocks plus the ECE super trac bar which makes it 2 1/4"

[dznucks]

i am going to have to measure the angles when i get the blocks installed.

You can correct the angle by flipping the mounts on the factory crossmember, or better yet, if you're bagging the truck, flip the entire trailing arm crossmember...that will flip the mounts and flip the carrier bearing (lwb)

do you mean you can correct the angle caused by lowering the truck by flipping the x-member? If so the CPP drop memeber does essentially the same thing?

[SCOTI]

Originally Posted by dznucks

i am going to have to measure the angles when i get the blocks installed.

do you mean you can correct the angle caused by lowering the truck by flipping the x-member? If so the CPP drop memeber does essentially the same thing?

Yes.

[dznucks]

cool. thanks scoti

[SCOTI]

With stock truck-arms & flipped mounts, it's possible the arms will come into contact w/the frame sooner on extreme drops (since the front of the arms would be higher). Something to keep in mind.