Zr2 front suspension

[KvetL5P]

.

[kylant]

read through the thread. for the parts list, this is what i came up with, what else is needed?

upper and lower control arms

2 diff drop brackets

knuckles

LCA bolts

rear blocks and u bolts

skid plates

 

will not be doing DSSV shocks so i don't believe the brake hoses are necessary.

 

thanks

[KvetL5P]

12 hours ago, kylant said:

read through the thread. for the parts list, this is what i came up with, what else is needed?

upper and lower control arms

2 diff drop brackets

knuckles

LCA bolts

rear blocks and u bolts

skid plates

 

will not be doing DSSV shocks so i don't believe the brake hoses are necessary.

 

thanks

Seems right, only things your missing I believe are the one time use bolts. There is a list on one of the pages.

 

Also can someone confirm that this swap will work on a SRW 3500? I see the u bolts are spec'd to the 3500 size, but if I already have a 3500 would even longer bolts be needed?

[newdude]

53 minutes ago, KvetL5P said:

Seems right, only things your missing I believe are the one time use bolts. There is a list on one of the pages.

 

Also can someone confirm that this swap will work on a SRW 3500? I see the u bolts are spec'd to the 3500 size, but if I already have a 3500 would even longer bolts be needed?

 

 

Yes, assuming you are wanting to install the rear blocks from the ZR2.  

[KvetL5P]

41 minutes ago, newdude said:

 

 

Yes, assuming you are wanting to install the rear blocks from the ZR2.  

Ya, I assume I would need aftermarket U bolts to accommodate the 1 inch block for the 3500 springs?

[Epsilon Plus]

Part numbers:

 

Front:

Upper Control Arms:

Driver : 85144988

Passenger: 85144989

Lower Control Arms:

Driver: 85144990

Passenger: 85144991

Steering Knuckles:

Driver: 85144996

Passenger: 85144997

Differential Bracket:

Driver: 86787383

Passenger: 86787384

Lower Control Arm Bolt (x2): 11549229

 

Rear:

Lift Block x 2: 87844916

U-Bolt (same as 3500HD) x 2: 11610959

Jounce Bumper Extension x 2: 85565250

 

ZR2 Skid Plates:

Front: 85637479

Transfer Case: 85569359

 

[kylant]

perfect. thank you.

 

didi you end up doing anything with the brake lines? if i read correctly, it looks like you did not

[Epsilon Plus]

I didn't because I didn't use DSSVs. The OP never posted on whether he finished the mod or not on his end and what ended up happening with the brake lines. I don't think it's been documented whether all 2024s got the brake line change either so the DSSVs could potentially fit all 2024+ models but there's no info on that.

[kylant]

thank you. i wont use the dssv shocks either. not sure what i will go with. 

[KvetL5P]

45 minutes ago, kylant said:

thank you. i wont use the dssv shocks either. not sure what i will go with. 

Bilstein 5100s seem like a good option.

Edited February 23, 2025 by KvetL5P

[GATORB8]

19 hours ago, KvetL5P said:

Bilstein 5100s seem like a good option.

Since I got some info from this thread, thought you guys may be interested in the shock comparison I started putting together when I got my ZR2 Gasser.

 

[GMCnewbie]

7 hours ago, GATORB8 said:

shock comparison I started putting together when I got my ZR2 Gasser.

Have you swapped out your stock shocks?  If so, which did you choose and how do you like them versus stock?  I purchased the Fox 2.5 HTO shocks for mine, but haven't had time to install.

[Epsilon Plus]

I have 5100s but don't expect amazing results. The springs on these trucks are so heavily sprung that you'll have to be loaded heavy or towing heavy to notice any difference and it will mostly be in control.

[GATORB8]

19 hours ago, GMCnewbie said:

Have you swapped out your stock shocks?  If so, which did you choose and how do you like them versus stock?  I purchased the Fox 2.5 HTO shocks for mine, but haven't had time to install.

I had originally planned to, but have been very impressed with the stock ride on the Multimatics so it'll likely wait until out of warranty shock failure.  From this thread it looks like the brake line routing will have to be redone as part of the swap since most RR shocks utilize the ZR2 location for reservoir mounts.  The 37" fit stock, so I didn't need to swap to accommodate a lift. 

 

Not real learned up on the HTOs, but I'd expect you'll likely get a better ride out of the Foxes than the BS 5100s.  Fox doesn't normally use the stiffer digressive valving.  I didn't see the HTOs as an option on the Fox site last fall when I made the spread sheet.

 

A buddy of mine just swapped his AT4X 3/4 out for an AT4 1 ton, he's got the King RR Adjustibles to put on, so I look forward to his feedback since he'll have direct Multimatic experience.

 

Regarding the BS 5100s, from experience with both on our Jeep, I'd highly recommend springing for the 5160s (same ~2" body with a remote reservoir).  They're normally the cheapest RR option, and I saw significant ride improvement over the 5100s back to back.  

Edited February 25, 2025 by GATORB8

[red44]

On 2/23/2025 at 1:31 PM, KvetL5P said:

Bilstein 5100s seem like a good option.

Agree, never had any issues with Bilstein shocks before. I was a Rancho guy for a while, but they never really lasted longer than 2 years.