FX3 Shock swap questions
Thread Starter
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
FX3 Shock swap questions
Hey all- I sprung a small drip on the front passenger shock of my 91 ZR1. I looks looks like a shock swap is in order as I have 92k on the car. No codes but the age and mileage say "lets go." I have a couple of questions:
I have a brand new (in the box un opened) full set of Bilstein FX3 adjustable shocks that I was saving. I bought these several years ag in anticipation of a swap off my current set. They have been in my garage for probably 4-5 years. Does anyone see any age related issues (seals leaking?) as to why there would be a problem swapping these out?
Are the C4 Corvette shock bushings universal/inter changable that I coudl order from a local part store? I just drive on the street a couple of times a month so a no need for "high performance" bushings.
Also, is there any thing I need to do to set the "clock" on the FX3 shock when I put the Actuator back on or is it self adjusting?
Thank for your help!
I have a brand new (in the box un opened) full set of Bilstein FX3 adjustable shocks that I was saving. I bought these several years ag in anticipation of a swap off my current set. They have been in my garage for probably 4-5 years. Does anyone see any age related issues (seals leaking?) as to why there would be a problem swapping these out?
Are the C4 Corvette shock bushings universal/inter changable that I coudl order from a local part store? I just drive on the street a couple of times a month so a no need for "high performance" bushings.
Also, is there any thing I need to do to set the "clock" on the FX3 shock when I put the Actuator back on or is it self adjusting?
Thank for your help!
Le Mans Master
Joined: Dec 2005
Posts: 8,582
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From: Communist Colorado
I dont think youd have any issues using the ones you bought and stored... IIRC, (been a few years) when I replaced the ones onmmy 90 & 92 ZR-1's, the actuators can be put on in any position. As far as the bushings, Im not 100% sure.... I suppose you could get a few measurements of the ID & OD of the bushings and see if theyre the same.
Drifting
Joined: Jan 2021
Posts: 1,314
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From: Northern California
I agree with the above on all points. If it were me, I would reuse the existing bushings. New ones are only available in polyurethane and they mess with the position of the rear upper shock sleeve, as they are too hard and don't allow an angle for the upper sleeve cover. Then it rubs on the shock body itself, etc...
The shock actuators will do a full travel test at key on, so they read that and reset for full range every time. The chip in the controller is pretty smart about this.
The shock actuators will do a full travel test at key on, so they read that and reset for full range every time. The chip in the controller is pretty smart about this.
Last edited by ajp01; Mar 9, 2025 at 10:25 PM.
Thread Starter
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
Safety Car
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Thread Starter
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
I'll have to shoot you the part number once I get the package (thursday). These are FX3 specific bushings and you are right there is a difference in the hole size as the shaft on the FX3 is slightly larger.
