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Zr2 front suspension

Joe97281

By Joe97281
in Modifications & Accessories

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215robert Enthusiast

215robert

Posted
Posted
13 hours ago, Epsilon Plus said:

I spent $1,600 shipped for the full swap including skids and one-time-use TTY bolts/nuts. The only thing left to buy is a couple bolts for mounting the rear of the transfer case skid when I mock it up and decide if I can tap threads or use through bolts.

 

Figure ~$2,000 if doing it from stock to finished with a set of Bilstein 5100s.

X2

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UTGOZER
UTGOZER

Boom! Done!! It turned out just as I hoped. Again, thank you to all that have contributed to this thread.

215robert
215robert

Complete minus alignment!

Epsilon Plus
Epsilon Plus

Front & rear ZR2 lift complete!    37x12.5s on GM 18x8s. No rub!

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Epsilon Plus Enthusiast

Epsilon Plus

Posted
Posted

The ZR2 transfer case skid vs the baby Z71 skid. In the process of drilling the rear holes. Going to use through+bolts and nuts. Initially was going to tap M10x1.5 threads for one of the unused front Z71 bolts and add another, but didn't have the right 8.5mm or whatever PITA metric bit.

 

Fits on the 20-23 great, just need to drill rear holes.

 

20240418_190816.thumb.jpg.1541ceebe946c1246936fd221272bbe2.jpg

 

  • 2 months later...
OS RR Enthusiast

OS RR

Posted
Posted (edited)
On 4/12/2024 at 9:45 AM, Epsilon Plus said:

Ride is softer for me because I went from concrete POS 31" Firestones to 37" Nittos with 30% more sidewall. 

 

 

Epsilon, do you have a shot down the side? Internet says your wheels are 18x8 44+ offset. I'm curious to see the difference between those and how the ZR2 wheels poke out (looking around on youtube).

 

Best I can find ZR2 wheels are 18x9 +32.

Edited by OS RR
Dunn Senior Enthusiast

Dunn

Posted
Posted
On 4/12/2024 at 6:45 AM, Epsilon Plus said:

Ride is softer for me because I went from concrete POS 31" Firestones to 37" Nittos with 30% more sidewall. 

 

Still an HD truck. Still feels most things in the road. Even with DSSVs I doubt it softens up more. People that say they ride great are probably justifying their purchase in their minds. It still has a 3,500+ lb payload rear leaf spring that has to compress before the shock even thinks about controlling rebound.

 

The OP that started all this was deep into changing brake lines and all that for the DSSVs. Dunno what happened with that. I still think for the same cost and likely better results King remotes that are at least rebuildable are the more prudent route. If I had a factory ZR2 and one of those leak prone DSSVs crapped on me I'd be trying to sell the other 3 and go to Kings before I spent another $800 for a single shock to maybe make it to 50k. 

 

That's just my $.04 (adjusted for inflation).

I wouldnt waste money on DSSV, they are built to a production pricepoint...there are far better shocks on the market and rebuildable.....without the hassle of re routing lines

 

getting the geometry correct is the important thing....pick the boinger of your choosing

  • 1 month later...
Joe97281 Enthusiast

Joe97281

Posted
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Posted

The official chevrolet and gmc parts websites are having a 35% off sale right now. I got both zrx knuckles shipped to the dealer (free shipping this way) for $225. Probably a good time to get all the conversion parts if you have been on the fence about it. The big discount parts centers might have better prices, but shipping on the heavy items kills the deal. 

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  • 2 weeks later...
GMCnewbie Enthusiast

GMCnewbie

Posted
Posted

I'm looking to make the swap on my '24 Sierra AT4 HD.  I'd love to hear about ride quality from those with the 2500 trucks that made the swap.  I believe Epsilon is the only one that's made a comment on this and it was to say the ride was a bit softer for him.  

 

For those that have completed the swap, has the ride quality improved over stock?  Also, would you do it again?  As in, was it worth it?

Epsilon Plus Enthusiast

Epsilon Plus

Posted
Posted (edited)

A bit softer. Like going from a covered wagon to a Model T. Spring rate is just too high on the torsion bars and rear leafs for the shocks to even be involved in everyday driving unless you are loaded down. The only way I think you can really soften this truck up is with Cognito's comfort ride torsion and leaf set up. -25% rate, but also -25% payload/capability. I'm not willing to un-HD my HD.

 

I'm on 37s with 45psi front, 40 rear and the wife still has to be mindful of slight cracks in the road when taking a drink of her water cup or she'll be wearing it.

 

I would do it again. Price was right. No aftermarket jank. Factory driving characteristics/capability. Perfect for me stance. Fit 37s. Cons are that it is a ton of work for a baby lift. Being that you have a 24 though you might be able to run the DSSVs. Still a mystery on whether all 24s got the hard brake line change to allow for the massive shock bodies.

Edited by Epsilon Plus
  • 2 weeks later...
pewterliftedz Enthusiast

pewterliftedz

Posted
Posted

Has anyone installed the ZR2 upper control arms only?  Along with leveling keys obviously. 
 

Seems like a great alternative to aftermarket arms like cognito.

215robert Enthusiast

215robert

Posted
Posted (edited)

Ride is great! I had my bars cranked 3/4 of an inch before the swap and it did compromise comfort. Would do it again...

Edited by 215robert
Mis spelling
GMCnewbie Enthusiast

GMCnewbie

Posted
Posted
10 minutes ago, 215robert said:

Ride is great! I had my bars cranked 3/4 of an inch before the swap and it did compromise comfort. Would do it again...

Thanks.  Is the ride better now with the new setup versus simply cranking on the torsion keys?

GMCnewbie Enthusiast

GMCnewbie

Posted
Posted
8 hours ago, 215robert said:

Just like Factory!

Good to hear.  One last question... what shocks did you go with?  I had Bilstein's on my Power Wagon and hated how rough the ride was.  Switched to Fox 2.0's and thought they were a huge improvement, but also thought they were a bit softer than I'd prefer.  I'm not a fan of the stock Rancho's on my AT4.  

  • 2 weeks later...
  • 3 weeks later...
GATORB8 Enthusiast

GATORB8

Posted
Posted

@Epsilon Plus

 

Couple questions for you, if you don't mind.  My truck is in transit so I don't have access yet, and am considering ordering a couple things before it shows up so I'll have brand new take off parts to sell.

 

Considering Accutuned King or Fox elite 2.5s, but there's no specific data on correct min/max lengths so I can pick the right ones.  Any chance you took a compressed measurement on the bump stop?  Does the shock act as the droop limit with the ZR2 parts, or is there something else holding it back?  Which length 5100s are you running?

 

Cognito is saying their Comfort Ride Torsion Bars wont work on the ZR2.  You used your stock bars on yours right?  Did you happen to identify if the stock bars are the same between the Z71 and ZR2?

 

 

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