CPP Lowering Blocks - The 1947 - Present Chevrolet & GMC Truck Message Board Network

C10Slim · 10-23-2009, 09:07 AM

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 · 10-23-2009, 09:14 AM

Quote:

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 · 10-23-2009, 09:24 AM

Awesome thanks for the quick reply SCOTI!

dznucks · 10-23-2009, 09:28 AM

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 · 10-23-2009, 09:33 AM

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** · 10-23-2009, 03:25 PM

do all trucks need pinion shims?

SCOTI · 10-23-2009, 05:44 PM

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** · 10-23-2009, 05:55 PM

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

dznucks · 10-23-2009, 07:53 PM

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 · 10-23-2009, 07:55 PM

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** · 10-23-2009, 10:04 PM

Quote:

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

Quote:

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 · 10-24-2009, 02:07 AM

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 · 10-24-2009, 05:56 AM

Quote:

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 · 10-25-2009, 09:06 PM

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

VA72C10 · 10-25-2009, 09:25 PM

Quote:

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.

Quote:

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 · 10-26-2009, 07:17 AM

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

Quote:

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 · 10-26-2009, 08:57 AM

Quote:

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 · 10-26-2009, 01:52 PM

cool. thanks scoti

10-23-2009, 09:07 AM	#1
C10Slim Registered User Join Date: Jul 2009 Location: Needville, TX Posts: 283	CPP Lowering Blocks 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.

10-23-2009, 09:24 AM	#3
C10Slim Registered User Join Date: Jul 2009 Location: Needville, TX Posts: 283	Re: CPP Lowering Blocks Awesome thanks for the quick reply SCOTI!

10-23-2009, 09:28 AM	#4
dznucks Registered User Join Date: Feb 2006 Location: Smyrna, Ga Posts: 1,647	Re: CPP Lowering Blocks 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.

10-23-2009, 09:33 AM	#5
C10Slim Registered User Join Date: Jul 2009 Location: Needville, TX Posts: 283	Re: CPP Lowering Blocks 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?

10-23-2009, 03:25 PM	#6
kev2809 low n' slo Join Date: Mar 2009 Location: rosenberg, texas Posts: 5,175	Re: CPP Lowering Blocks do all trucks need pinion shims? __________________ 67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____\|__\|__\__ ,.,,,.,.,,.,\|_O _______ O_]

10-23-2009, 05:44 PM	#7
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,064	Re: CPP Lowering Blocks 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. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

10-23-2009, 05:55 PM	#8
kev2809 low n' slo Join Date: Mar 2009 Location: rosenberg, texas Posts: 5,175	Re: CPP Lowering Blocks you basically you wont know until you get the blocks in and drive it around? __________________ 67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____\|__\|__\__ ,.,,,.,.,,.,\|_O _______ O_]

10-23-2009, 07:53 PM	#9
dznucks Registered User Join Date: Feb 2006 Location: Smyrna, Ga Posts: 1,647	Re: CPP Lowering Blocks 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.

10-23-2009, 07:55 PM	#10
dznucks Registered User Join Date: Feb 2006 Location: Smyrna, Ga Posts: 1,647	Re: CPP Lowering Blocks damn there aint nothing but texans on this thread. i'll be in fort worth tuesday for work, austin/dripping springs for the weekend.

10-24-2009, 02:07 AM	#12
VA72C10 VA72C10 Join Date: Mar 2008 Location: Midlothian, VA Posts: 25,267	Re: CPP Lowering Blocks 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) __________________ Looking for a 67-72 swb or blazer project in or around VA.

10-25-2009, 09:06 PM	#14
chevydog66 GM ONLY BABY!!! Join Date: Oct 2003 Location: Fort Wayne, IN. Posts: 1,998	Re: CPP Lowering Blocks I had to shim my 72 GMC lb after installing 2" blocks about 6*. __________________ 2 wrongs don't make a right, but 3 lefts do. 66 Chevelle Malibu 406ci, 573hp, 10.99@121mph 96 Chevy Silverado Z71 72 GMC 1500 Super Custom LS 6.0/4L65 on airride http://www.cardomain.com/ride/707879...mc-c-k-pick-up

10-26-2009, 01:52 PM	#18
dznucks Registered User Join Date: Feb 2006 Location: Smyrna, Ga Posts: 1,647	Re: CPP Lowering Blocks cool. thanks scoti



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