04 coil spring air bag experince.........a must do!

Colemanfu

New member
04 coil spring air bag experience.........a must do!

Got to start by saying, I love them and wish I had done this $100 15min. mod when I 1st got the rig!

If you haul, tow or just want to slightly stiffen up the rear end get a set of Airlift 1000's. I also noticed less side to side sway when turning . Just made it feel a bit more solid and less mush. I also have zero sag when hauling - I always hated that low rider look when the truck full. It did give about an inch more lift but that was way too stiff. I did add a 1/2 spacer made from a plastic cutting board on the top of the bag to gain a bit more lift but that's just pure red neck. Just like the lower spacer, same size but was not sure how the bag would react to sitting on the nub of a bump stop (there is a gap between the bump stop and spacer. I wanted to make it a flush fit (and 1/2 lift) on the top just like the bottom. Don't know why they dont include a second dics in the kit like the bottom?

Yes, it only took 15 min. to put them in. By nature I always try to find the easy way of doing things and did not want to break down the rear end like I did during the lift (take the springs out drop the sway and pan hard, jack stands) all that crap. I did chuck the front so I did not roll.

I started with the seak knife - cut down the bump stop level with the lift spacer above the coil. Tool out the HiLift and stuck it in the reciever hitch and jacked that sucker up till it was just about off the ground - it started to go side to side and I quickley backed it down. With the tires just touching and the coils at almost max flex I removed the black end cap on the air bag so I could fold and squeez as much air out as I could so I could fit it in between the coils. With the back end jacked up you have about 4 inches above and below the air bag when it's deflated - plenty of room just like if the coil was removed?. I did wait to put the valve on the end of the hose till I lowered the jack. I think that allowed the bags let air in and out and to sit in place and makeing sure nothing was pinching. Put both bags in and ran the lines. There is a stock hole in the lower seat for the coils so no drilling was needed. I put hose up the rear drivers side and out the small hole below the gas cap. All the extra hose fits in below and you can pull out as much as you need to fill up then tuck it back in with just about 3 inches sticking out.


I love the look of it with the bags at about 10-12 psi with the back slightly higher then the front yet not too stiff. At 22psi I had 39 3/4 at the rear wheel fender - 39 1/4 loaded. I had them at 12 and loaded it up with gear for the trip and it only went up to about 20 psi with only loosing 1/2 inch of lift.
I am out of town for the week but will post the pix when I return.
 
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Great post and info. Look forward to hearing any more impressions as you get some miles on it. For $100 + some quality time with your rig it sounds well worth it.
 
Here's another vote for Air Lifts. I installed a set on my '98 4Runner LTD to level the truck when my 4,000# trailer was being towed.

Installation was super easy. I simply jacked up the truck and let the rear axle go to full droop, then folded up the bags and stuffed them into the center of the springs through the gap between the coils. They performed perfectly for the ensuing 5 years and 75K miles I had the truck.

I bought the factory rear air suspension on our '03 and like it, although it was hugely expensive. It appears Toyota has now dropped that system, so it's good to know that Air Lifts will still be an option for me when we replace our '03 with a new 'Runner at 5 years/75K miles.
 
For those of you that have the air suspension or have installed the air bags; do any of you have the '03+ XREAS/Sport suspension on your vehicles? We loaded down our 4Runner with 600+lbs of cargo this past summer on a road trip and I've had 3,500-4,000lb trailers hitched up to my vehicle and every time I have a heavy load in the back, the ENTIRE vehicle ends up being lower, not just the rear. With the way the shocks are linked fore/aft, it actually ends up dropping the front slightly as well as the rear, so the whole vehicle still sits VERY flat/level front to back.

Just an observation I've made with my '03 Sport model while towing and having heavy loads on-board.

Ricky
 
Hi Ricky. We have both the X-REAS shocks and the factory rear air suspension on our '03 LTD. We routinely have some fairly heavy loads (toolbox, large suitcases, full tank of fuel) in the back when towing our ~4,000# trailer, and have no side effects such as you report.

IMHO, this is a great system for towing, utterly transparent and user-friendly. The only side effect I've been able to identify is that the ride gets a tiny bit harsher when the air bags have pumped themnselves up to level the load. This was also the case on my '98 with Air Lifts when I'd put in the 18 psi needed to level the rig. I only wish the X-REAS/air suspension package had been less than the ~$1K it cost.

Regards.
 
15 MINUTES!!!!??? Well you guys definately sold me!!

I too had questions about the AirLift's & Xreas, but that seem to have been answered.

So is there any issues with the VSC & Traction Control? I've noticed mine is sensitive to various loads, and leveling.
 
Well 15 min to do most the work another 15 just to tinker with running the line put the gas filler and zip tying every thing down. High safety standards! Have not done many mods as of late to the rig so I did slow dow a bit to enjoy messing with the old rig again. Totally geeked out with testing different psi's and measuring amounts of lift. I was just shocked at what a no brainer it was to put them in. Having the stock holes at the spring pad saved much time as well as how far those springs stretched when jacked up.

It did make me wish ......(sign of addiciton) that I had some real sliders to lift from the side to isolate a singel wheel. Could be next on the list - she does get payed off in less than a year???????????
 
khaug said:
Hi Ricky. We have both the X-REAS shocks and the factory rear air suspension on our '03 LTD. We routinely have some fairly heavy loads (toolbox, large suitcases, full tank of fuel) in the back when towing our ~4,000# trailer, and have no side effects such as you report.

IMHO, this is a great system for towing, utterly transparent and user-friendly. The only side effect I've been able to identify is that the ride gets a tiny bit harsher when the air bags have pumped themnselves up to level the load. This was also the case on my '98 with Air Lifts when I'd put in the 18 psi needed to level the rig. I only wish the X-REAS/air suspension package had been less than the ~$1K it cost.

Regards.

I wouldn't necessarily call it a 'side effect'... I was mainly just mentioning that when I load up my 4Runner, the stock XREAS suspension (without air bags) does a great job of leveling the vehicle by itself. That's the whole point of airbags is to level out the vehicle, right? Why not allow it to level out lower than stock (where it would be more stable, anyways) when you have a heavy load on it? From what I've seen, when you have XREAS, air bags don't seem to be needed.

Now, TeryT may have a difference experience on the extreme end of towing with his almost-30-foot camper, but for most of us that are towing 5,000lbs or less, it shouldn't really be necessary. Again, I'm not referring to SR5's or Limiteds without XREAS.

Ricky
 
RickyCRX said:
Now, TeryT may have a difference experience on the extreme end of towing with his almost-30-foot camper, but for most of us that are towing 5,000lbs or less, it shouldn't really be necessary. Again, I'm not referring to SR5's or Limiteds without XREAS.

Ricky
My ultralight is 26'. Being an ultralight it only comes in at around 4600 loaded, so it is well under the GCWR.

The tongue weight is the bigger issue, as it is around the 700 lb. max. I'm definately leaning in the direction of these nifty air bags!
 
TeryT said:
My ultralight is 26'. Being an ultralight it only comes in at around 4600 loaded, so it is well under the GCWR.

The tongue weight is the bigger issue, as it is around the 700 lb. max. I'm definately leaning in the direction of these nifty air bags!

Yeah, as I mentioned; you're on the extreme end of towing what these vehicles are rated for. That's some substantial tongue weight...

TeryT: I notice you have an '03 model V8; did you ever replace the hitch receiver with a better frame-mounted one, or did you get one of the later-model '03s that already has the newer hitch design? Mine's the old style receiver (vehicle was manufactured in 10/02, if I remember right) and I just recently decided to purchase a round tube frame-mounted receiver from Hidden Hitch. It should arrive this week and I'm going to replace mine since I'll be doing some heavier towing in the near future... I'll be taking a friend's car from San Antonio to Fort Worth and back in February for a race event; the car hauler itself is around 2,000lbs empty, the car is about 3,600lbs... I don't feel comfortable towing that much with the V6-style receiver (which is only rated to 5,000lbs). I'm sure it would do it, but I would feel better about having the stronger receiver.

Ricky
 
RickyCRX said:


TeryT: I notice you have an '03 model V8; did you ever replace the hitch receiver with a better frame-mounted one, or did you get one of the later-model '03s that already has the newer hitch design? Mine's the old style receiver (vehicle was manufactured in 10/02, if I remember right) and I just recently decided to purchase a round tube frame-mounted receiver from Hidden Hitch. It should arrive this week and I'm going to replace mine since I'll be doing some heavier towing in the near future... I'll be taking a friend's car from San Antonio to Fort Worth and back in February for a race event; the car hauler itself is around 2,000lbs empty, the car is about 3,600lbs... I don't feel comfortable towing that much with the V6-style receiver (which is only rated to 5,000lbs). I'm sure it would do it, but I would feel better about having the stronger receiver.

Ricky
I got the later year 03, with the heavy weight dist. hitch receiver.
 
Re: 04 coil spring air bag experience.........a must do!

Colemanfu said:
Got to start by saying, I love them and wish I had done this $100 15min. mod when I 1st got the rig!

If you haul, tow or just want to slightly stiffen up the rear end get a set of Airlift 1000's. I also noticed less side to side sway when turning . Just made it feel a bit more solid and less mush. I also have zero sag when hauling - I always hated that low rider look when the truck full. It did give about an inch more lift but that was way too stiff. I did add a 1/2 spacer made from a plastic cutting board on the top of the bag to gain a bit more lift but that's just pure red neck. Just like the lower spacer, same size but was not sure how the bag would react to sitting on the nub of a bump stop (there is a gap between the bump stop and spacer. I wanted to make it a flush fit (and 1/2 lift) on the top just like the bottom. Don't know why they dont include a second dics in the kit like the bottom?

Yes, it only took 15 min. to put them in. By nature I always try to find the easy way of doing things and did not want to break down the rear end like I did during the lift (take the springs out drop the sway and pan hard, jack stands) all that crap. I did chuck the front so I did not roll.

I started with the seak knife - cut down the bump stop level with the lift spacer above the coil. Tool out the HiLift and stuck it in the reciever hitch and jacked that sucker up till it was just about off the ground - it started to go side to side and I quickley backed it down. With the tires just touching and the coils at almost max flex I removed the black end cap on the air bag so I could fold and squeez as much air out as I could so I could fit it in between the coils. With the back end jacked up you have about 4 inches above and below the air bag when it's deflated - plenty of room just like if the coil was removed?. I did wait to put the valve on the end of the hose till I lowered the jack. I think that allowed the bags let air in and out and to sit in place and makeing sure nothing was pinching. Put both bags in and ran the lines. There is a stock hole in the lower seat for the coils so no drilling was needed. I put hose up the rear drivers side and out the small hole below the gas cap. All the extra hose fits in below and you can pull out as much as you need to fill up then tuck it back in with just about 3 inches sticking out.


I love the look of it with the bags at about 10-12 psi with the back slightly higher then the front yet not too stiff. At 22psi I had 39 3/4 at the rear wheel fender - 39 1/4 loaded. I had them at 12 and loaded it up with gear for the trip and it only went up to about 20 psi with only loosing 1/2 inch of lift.
I am out of town for the week but will post the pix when I return.


Hey Colemanfu,
I have about 2.5" of lift in the back using the OME medium rear coils; do you see any issues with this airbag system working with my setup?
 
HR - For a $100 bucks give it a shot. The bags did included some paper work if you had to retrun them (undamaged). I think the coil you have is a bit longer - 2 or so inches? Right? So the bag is designed for a shorter spring and may not be long enuff to fill it up - width shoudl not be the issue. One idea is to keep the bump stop. It is recomended it is cut off to fit the air bag. In theory alone that should fill the extra space. I would make some kind of disc (see above) that would sit atop the air bag to maintain constant contact with the bump stop. another idea is an air bar that's just longer but the same width - depends if Airlift is willing to work with ya. OME may be able to compare your lifted spring to a stocker and you can get that application.

Clear as mud now right?

Hope it helps a bit.
 
Colemanfu said:
HR - For a $100 bucks give it a shot. The bags did included some paper work if you had to retrun them (undamaged). I think the coil you have is a bit longer - 2 or so inches? Right? So the bag is designed for a shorter spring and may not be long enuff to fill it up - width shoudl not be the issue. One idea is to keep the bump stop. It is recomended it is cut off to fit the air bag. In theory alone that should fill the extra space. I would make some kind of disc (see above) that would sit atop the air bag to maintain constant contact with the bump stop. another idea is an air bar that's just longer but the same width - depends if Airlift is willing to work with ya. OME may be able to compare your lifted spring to a stocker and you can get that application.

Clear as mud now right?

Hope it helps a bit.

Bobby has the lift and the air bags with no problem!

Koz
 
Just got a chance to upload some pix of the air bags. You can see that there is plenty of room to put the bag in with out removing the PHB and SB's. I just stuck my hi lift in the reciever hitch and jacked it up till it about left the ground. No need to take all that crap off and there was a stock hole to run the line thru the seat of the coil spring.
 

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You can see the red neck spacers I added on top and bottom of the bag - just held in place with the wt of the rig.
 

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Thanks! I really like these, and will almost definately do it!

What's a "red-neck spacer?"

I also really like the back-up light. Is that on a switch or automatic?
 
The back up light is just on a switch - I put it on the lower left blank space near the diff lock. It lights up blue when it's on and out of the way so I do not hit it by mistake. Got it at Raido Shack.

If you look close you can see the white spacer on the bottom and the top of the air bag. If you look at the top there is a wee little gap between the revteck spacer and the one I added - just a chunck of cutting board. it started because I did not like how the bag sat on the cut off bump stop - added the lower below the spacer that came with the bags.

Let's see if I have clost up pix.
 

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