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Old 01-18-2024, 12:42 PM #1
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04 Limited with X-REAS suspension replacement

Hey all,

I've got a 04 Limited V8 with 213k. It's been riding bouncier lately so I've been researching suspension replacement. I don't wish to raise the runner up and I am planning on upgrading my calipers and rotors to a Gen 5 since I'm having sticking issues.

My runner has the X-REAS suspension and I've read different things. From what I gather in can just disconnect the X-REAS lines from the suspension and replace with Bilstein 5100? Also do I need to replace the springs if they look solid?

Thanks for any info!
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Old 01-18-2024, 01:25 PM #2
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I have an '04 V8 SE. When/if my X-REAS wear out I plan on getting them replaced, if OEM parts are available. I tow a 23' Airstream (about 6,500 lbs) and the X-REAS have performed very well for both ride and handling.

I understand the desire to change if you have a spongy ride but have you considered taking it to a Toyota dealership to have them checked? Maybe there's just a fluid leak and it needs to be repaired and fluid replaced. Just a thought - 2
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Old 01-18-2024, 02:27 PM #3
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I have not taken it to the dealership cause I was trying to just do things myself. Since my mileage is so high I just assumed the suspension would need to be replaced anyway.
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Old 01-18-2024, 04:46 PM #4
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Grab assemblies if possible. I put new/used (6 month old) gen5 assemblies on the front of mine. Got back to normal lift and way better ride over the old assemblies. Cheap way out for an old vehicle.
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Old 01-18-2024, 08:39 PM #5
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I replaced mine with Bilstein 4600's and FJ springs. Your stock springs will be ok as long as they are in good condition, but they may have sagged a little. The 4600's offer a firmer ride, less nose dive and less body roll when cornering. The Bilstiens in general are a little harsh over small road bumps.
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Old 01-19-2024, 02:53 AM #6
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Quote:
Originally Posted by MikeinNH67 View Post
Grab assemblies if possible. I put new/used (6 month old) gen5 assemblies on the front of mine. Got back to normal lift and way better ride over the old assemblies. Cheap way out for an old vehicle.

Interesting. Was there a way to assure they were removed in the proper way so that there was no fluid lost?

Did you replace the 4 shocks only or did you also replace the center controllers as well? If you could share any and all details that would be great! A lot of folks are yanking out their new-like new 5th gen units and this would be a great (and likely affordable) way to replace the tired 4th gen units!
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Old 01-19-2024, 07:51 AM #7
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Quote:
Originally Posted by MikeinNH67 View Post
Grab assemblies if possible. I put new/used (6 month old) gen5 assemblies on the front of mine. Got back to normal lift and way better ride over the old assemblies. Cheap way out for an old vehicle.
What do you mean by assemblies?
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Old 01-19-2024, 07:59 AM #8
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Quote:
Originally Posted by rdruss View Post
I replaced mine with Bilstein 4600's and FJ springs. Your stock springs will be ok as long as they are in good condition, but they may have sagged a little. The 4600's offer a firmer ride, less nose dive and less body roll when cornering. The Bilstiens in general are a little harsh over small road bumps.
Mind giving a link or telling what year FJ springs you used?
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Old 01-19-2024, 08:59 AM #9
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I used '07 FJ springs; P/N 48231-35321
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Old 01-19-2024, 09:03 AM #10
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Quote:
Originally Posted by GCEMSPETE View Post
Mind giving a link or telling what year FJ springs you used?
Let me be more specific:
Rear springs: 48231-35321
Front springs: 48131-35541 and 48131-35551
All for an '07 FJ.
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Old 01-19-2024, 09:09 AM #11
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Quote:
Originally Posted by GCEMSPETE View Post
Hey all,

I've got a 04 Limited V8 with 213k. It's been riding bouncier lately so I've been researching suspension replacement. I don't wish to raise the runner up and I am planning on upgrading my calipers and rotors to a Gen 5 since I'm having sticking issues.

My runner has the X-REAS suspension and I've read different things. From what I gather in can just disconnect the X-REAS lines from the suspension and replace with Bilstein 5100? Also do I need to replace the springs if they look solid?

Thanks for any info!

X-REAS isn't bad, just prohibitively expensive to repair since so many bits all have to come from the dealer and get replaced together. If you want to replace it, just unbolt everything and install new shocks.

1. Replace everything F/R simultaneously. Once you've loosened/removed one X-REAS shock the opposite corner loses pressure too, so it's all or nothing.

2. Springs are optional, though recommended. I replaced everything around 250k and discovered my 1.5" lift was more like 3" over the current ride height. Turns out my factory springs were so worn that they were sagging several inches from where they were supposed to be.

3. Don't forget new top hats with the new shock, as well as inspecting the various bushings and ball joints. Replacing suspension components is cheapest when you already have things unbolted & need an alignment anyway.
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Old 01-19-2024, 09:22 AM #12
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Quote:
Originally Posted by rdruss View Post
I used '07 FJ springs; P/N 48231-35321
I'm assuming any 07 FJ spring would work off RockAuto? Also, what made you decide to replace the springs? What should I look for in mine?
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Old 01-19-2024, 10:05 AM #13
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Quote:
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Let me be more specific:
Rear springs: 48231-35321
Front springs: 48131-35541 and 48131-35551
All for an '07 FJ.
Is there a specific reason you went to FJ springs instead of just 4runner springs?
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Old 01-19-2024, 04:25 PM #14
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Quote:
Originally Posted by Rocket3004 View Post
Interesting. Was there a way to assure they were removed in the proper way so that there was no fluid lost?

Did you replace the 4 shocks only or did you also replace the center controllers as well? If you could share any and all details that would be great! A lot of folks are yanking out their new-like new 5th gen units and this would be a great (and likely affordable) way to replace the tired 4th gen units!
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Originally Posted by GCEMSPETE View Post
What do you mean by assemblies?
Sorry, I should have been more specific. These are the standard assembly with spring, strut and top hat. My truck doesn't have X-reas just giving another option as I understand repairing this system is pricey. Something like the link below. I was watching for them and found some that were on a Gen5 truck for 6 months. They had the same year stamped on them and looked brand new. All you have to do is trim the lower eyelet about 1MM and they fit right on. I see some that come with the rear shocks too.

https://www.ebay.com/itm/14550947521...wAAOSwkFtlgjbM
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Old 01-19-2024, 09:58 PM #15
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Quote:
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Is there a specific reason you went to FJ springs instead of just 4runner springs?
At the time (2016) the FJ springs were being promoted in discussions on here as the way to go and that's why I chose them. Haven't been sorry, although the Bils are a little harsh on road bumps so I have new Dobinson IMS in hand that I will install once the weather turns warmer, they are progressive valved vs. Bils being digressive valved, so I expect a little better road ride.
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