Froehlich Suspension Tech Late Model Build, Sneak Preview
Thread Starter
Cherokee Forum Vendor
Joined: Mar 2011
Posts: 1,448
Likes: 2
From: Lynden, WA
Year: 1998
Model: Cherokee
Engine: 4.0
Thanks man. Lol let me know if you need anything to work towards your goal.
1-3/4" too bulky? 1-1/2" tube too dinky? 1-5/8" tube just right.
1-3/4" too bulky? 1-1/2" tube too dinky? 1-5/8" tube just right.
Thread Starter
Cherokee Forum Vendor
Joined: Mar 2011
Posts: 1,448
Likes: 2
From: Lynden, WA
Year: 1998
Model: Cherokee
Engine: 4.0
Thread Starter
Cherokee Forum Vendor
Joined: Mar 2011
Posts: 1,448
Likes: 2
From: Lynden, WA
Year: 1998
Model: Cherokee
Engine: 4.0
Got the rear coilovers mounted up. Picked up 4 90* fittings but went off the front threads for all 4 which are 1/2", the rear are 3/8". So I need to exchange those, put the bump stops on the shafts (which I think will be easier to remove the piston and valving to slide them on verse taking off the lower mount) then bleed and assemble the shocks so I can get them charged. What fluid is everyone using in their shocks?
Gonna be able to keep the cargo area sealed and useable.




Barely cleared the spring when flexed out. Would't have been able to make it work without the wheel spacers.
Gonna be able to keep the cargo area sealed and useable.




Barely cleared the spring when flexed out. Would't have been able to make it work without the wheel spacers.
Thread Starter
Cherokee Forum Vendor
Joined: Mar 2011
Posts: 1,448
Likes: 2
From: Lynden, WA
Year: 1998
Model: Cherokee
Engine: 4.0
Thread Starter
Cherokee Forum Vendor
Joined: Mar 2011
Posts: 1,448
Likes: 2
From: Lynden, WA
Year: 1998
Model: Cherokee
Engine: 4.0
So I took apart my coilovers to add the bumpstops on the shafts and bleed the air I let in when adding the 90 degree fittings on the remote reservoirs.
FOAs instructions and all other instructions I find say to set the internal floating piston at a depth of 8" then push in the seal head and wiper cap. Nowhere could I find anyone specifically stating the shaft exposure when doing this. Everyone seems to just be throwing them in *****-nilly. So I did some testing and I found today that it is indeed VERY important.
On an 18" coilover with a 7/8' shaft, there is 10.83 cubic inches of displacement from fully extended to compressed.
The remote reservoir is about 2.2" inner diameter so to take up 10.83 cubic inches, the IFS would travel 2.85".
This is the issue, the IFS bottoms out in these reservoirs at 8.75". When I installed my seal head, I had the shaft all the way compressed against the wiper cap to help guide the seal head in strait. This means that when I pull the shaft back out it will hydrolock and attempt to pull air pass the seals.
SO if installing the seal head with the shaft completely compressed then the IFS depth should be less than 5.9". If installing with the shaft completely extended then the IFS depth could be a maximum of just under 8.75.
Sound right? So is everyone just assembling these with the shafts extended and this is just general knowledge? Thought I would post it up anyways.
FOAs instructions and all other instructions I find say to set the internal floating piston at a depth of 8" then push in the seal head and wiper cap. Nowhere could I find anyone specifically stating the shaft exposure when doing this. Everyone seems to just be throwing them in *****-nilly. So I did some testing and I found today that it is indeed VERY important.
On an 18" coilover with a 7/8' shaft, there is 10.83 cubic inches of displacement from fully extended to compressed.
The remote reservoir is about 2.2" inner diameter so to take up 10.83 cubic inches, the IFS would travel 2.85".
This is the issue, the IFS bottoms out in these reservoirs at 8.75". When I installed my seal head, I had the shaft all the way compressed against the wiper cap to help guide the seal head in strait. This means that when I pull the shaft back out it will hydrolock and attempt to pull air pass the seals.
SO if installing the seal head with the shaft completely compressed then the IFS depth should be less than 5.9". If installing with the shaft completely extended then the IFS depth could be a maximum of just under 8.75.
Sound right? So is everyone just assembling these with the shafts extended and this is just general knowledge? Thought I would post it up anyways.
Thread Starter
Cherokee Forum Vendor
Joined: Mar 2011
Posts: 1,448
Likes: 2
From: Lynden, WA
Year: 1998
Model: Cherokee
Engine: 4.0
Alright got all of the cage done I am going to do for now. Got some things to do later like rear tire carrier, slider supports, gussets, ect.



Got the OX locker converted over to Air and plumbed it in. I will probably eventually build a mini skid for the cylinder.

Took it out around the block today after I got the new springs on and I am definitely going to need a sway bar. I picked up this torsion bar from an 86 trooper. Matching splines on each end so I can use the adjusting cams and just add arms to them. about 39" long, 7/8" diameter. Now I just need to figure out how long of arms I need to make and where Im going to mount it. :/

I have alot of little things left to do before this weekend. Here is the list.
Fine tune shock preload
Cap the front of the boat sides
Paint cage and undercarriage
Change rear pinion yoke to U Bolt style
Assemble T case shifter and center console
Mount shock reservoirs
Set steering stops
Do exhaust cat back
solder rear passenger harness I cut through while working on fenders
Convert AC to onboard air and hook up lockers.
Wire locker solenoids and switches.



Got the OX locker converted over to Air and plumbed it in. I will probably eventually build a mini skid for the cylinder.

Took it out around the block today after I got the new springs on and I am definitely going to need a sway bar. I picked up this torsion bar from an 86 trooper. Matching splines on each end so I can use the adjusting cams and just add arms to them. about 39" long, 7/8" diameter. Now I just need to figure out how long of arms I need to make and where Im going to mount it. :/

I have alot of little things left to do before this weekend. Here is the list.
Fine tune shock preload
Cap the front of the boat sides
Paint cage and undercarriage
Change rear pinion yoke to U Bolt style
Assemble T case shifter and center console
Mount shock reservoirs
Set steering stops
Do exhaust cat back
solder rear passenger harness I cut through while working on fenders
Convert AC to onboard air and hook up lockers.
Wire locker solenoids and switches.
CF Veteran
Joined: Mar 2012
Posts: 1,785
Likes: 0
From: Holland MI
Year: 2000
Model: Cherokee
Engine: 4.0
Looking good!
In reference to your sway bar, have you read this?
http://www.naxja.org/forum/showthread.php?t=1090855
In reference to your sway bar, have you read this?
http://www.naxja.org/forum/showthread.php?t=1090855
Thread Starter
Cherokee Forum Vendor
Joined: Mar 2011
Posts: 1,448
Likes: 2
From: Lynden, WA
Year: 1998
Model: Cherokee
Engine: 4.0
Looking good!
In reference to your sway bar, have you read this?
http://www.naxja.org/forum/showthread.php?t=1090855
In reference to your sway bar, have you read this?
http://www.naxja.org/forum/showthread.php?t=1090855
You're such a smart guy. I actually saw a write up on pirate from back in like 2008. I dont remember what torsion bar that guy used but thats where I got the idea. Then I remembered I had a body with an old trooper laying around that was a parts rig; started searching around to see if anyone had used those spacific torsion bars to convert to a sway bar and I came across that same thread you linked.
I want to put the sway bar in the rear since when you are climbing, all the weight gets transfered to the rear and thats when you tend to flop. The problem is figuring out where I can mount it in front of the axle without hitting upper or low links during compression and extension.
Why does the anti-roll bar need to be in front of the rear axle?
How about incorporating the bar mounts into a gas tank skid? Arms forward... with end links down to the truss. The arms could be "Z'd" if needed for clearance or ease of attachment.
How about incorporating the bar mounts into a gas tank skid? Arms forward... with end links down to the truss. The arms could be "Z'd" if needed for clearance or ease of attachment.
Last edited by nitropickup; Sep 1, 2013 at 06:36 PM.










