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Rear-end lift

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Old 02-10-2009, 02:24 PM
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Default Rear-end lift

Hey guys, is this all I need to lift my rear end 2"?

I'm going to get the Cognito for the front and raise it 3", but I also want to lift the rear 2".

REAR 2" LIFT BLOCKS & U BOLTS_88-08 CHEVY_GMC 1500_2500 - (eBay.ca item 310118839045 end time 26-Feb-09 19:46:49 EST)

Anything I should watch out for while installing this? (drive train angles, for example)
 
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Old 02-10-2009, 02:44 PM
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Approx $90?

Check your GM dealer for part #:
15712451 GM blocks
11588342 GM U-bolts
 
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Old 02-10-2009, 04:43 PM
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Originally Posted by Rttoys
Approx $90?

Check your GM dealer for part #:
15712451 GM blocks
11588342 GM U-bolts
Those pretty much the same thing? Just a set of extended GM u-bolts and a second set of blocks?
 
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Old 02-10-2009, 05:23 PM
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You will not have to worry about pinion angle with a 2" block.
 
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Old 02-10-2009, 05:49 PM
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Originally Posted by K50
Those pretty much the same thing? Just a set of extended GM u-bolts and a second set of blocks?

They are the same thing, but it's genuine GM parts, plus it might be cheaper without needing to pay for shipping.

"second set of blocks" ??
You have no blocks right now. The springs sit directly on top of the diff. These block will give you the 2" you want.

Oh ya, and you don't need a "leveling kit" for the front. Your stock torsion bar keys are fully capable enough to lift the front end where you want it.
 
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Old 02-11-2009, 12:28 AM
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Originally Posted by Rttoys
Approx $90?

Check your GM dealer for part #:
15712451 GM blocks
11588342 GM U-bolts

isnt that the z71 blocks with the 3500 u-bolts rear lift trick?
 
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Old 02-11-2009, 09:11 AM
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Originally Posted by Rttoys
They are the same thing, but it's genuine GM parts, plus it might be cheaper without needing to pay for shipping.

"second set of blocks" ??
You have no blocks right now. The springs sit directly on top of the diff. These block will give you the 2" you want.

Oh ya, and you don't need a "leveling kit" for the front. Your stock torsion bar keys are fully capable enough to lift the front end where you want it.
I thought the 3/4 tons already had a set of blocks under the leaf springs, just like a 1" set or something... I could have sworn they did..
It's true I don't NEED a levelling kit, but the Cognito one just looks like it will handle offroad situations much better than the stock configuration....that is unless anyone has a '79 Ford Dana 60 front axle they want to sell me for cheap
 
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Old 02-11-2009, 11:16 AM
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Originally Posted by 2500HeavyDuty
isnt that the z71 blocks with the 3500 u-bolts rear lift trick?
Yep. and that's what I have on mine.

---AutoMerged DoublePost---

Originally Posted by K50
I thought the 3/4 tons already had a set of blocks under the leaf springs, just like a 1" set or something... I could have sworn they did..
Not that I know of. Maybe a 3500 or 3500HD, but I've never seen them on a 2500HD in stock form.
 

Last edited by Rttoys; 02-11-2009 at 11:16 AM. Reason: Automerged Doublepost
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Old 02-11-2009, 11:59 AM
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Cool! Thanks for the tips, I'll check it out, might end up saving some $$ this way!
 
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Old 02-11-2009, 01:23 PM
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Originally Posted by Rttoys
Yep. and that's what I have on mine.

---AutoMerged DoublePost---



Not that I know of. Maybe a 3500 or 3500HD, but I've never seen them on a 2500HD in stock form.

i might have to go do that some day
 

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