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Thuren 2" Leveling Kit on 2500 - Before and After Measurements

Electronut

Electronut

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Just finished this wrenching and not sure if anyone ever shared the results but figured I would on my rig. Brand new truck with 80 miles recorded on odometer. Measurements taken on OEM stock setup and then again when changed over to Thuren 2" Front coils, Thuren Track Bar, Fox ISP 2.0 shocks tuned directly from Thuren, and Thuren links in rear since I have Ram Air from factory. Measurements are from center wheel hub to top of fender.

Stock OEM setup
Passenger Side:
Rear - 25 3/4 inches
Front - 24 3/4 inches

Drivers Side:
Rear - 25 9/16 inches
Front - 24 3/4 inches

After Thuren Products Install
Passenger Side:
Rear - 27 2/16 inches
Front - 27 inches

Drivers Side:
Rear - 26 3/4 inches
Front - 27 inches

In summary, front lift was exactly 2 1/4 inches. But I'm sure will settle little more after some driving. The rear dims on my truck were weird from the start being driver and passenger side were already roughly 1/4 inch difference. I tried adjusting the rear drivers side up another 1/4 to 1/2 inch by slighlty extending that side air link but little bit I threaded out it didn't trick the sensor to fill the bag little more. I'll drive the truck a little and let things settle and will fiddle with some more. By eye you can't tell that 1/4 inch difference anyway and would rather a little bit of a higher rake though when towing our travel trailer even though Ram Auto Leveling should keep as it is. I'm just being particular about.

Perhaps this helps others that need real stats.
 
Looking for some feedback on ride. vehicle is 22' 2500 Laramie CCSB, I have Thuren 2" level coils, Fox shocks all the way around, Thuren sway and track bars. Not happy with ride, especially at the rear. I did not swap rear coils, as I plan on towing a 5'er. What am I missing? tire pressures are also down to help with ride. Im bouncing around a lot. TIA
 
Leonm228 said:
Looking for some feedback on ride. vehicle is 22' 2500 Laramie CCSB, I have Thuren 2" level coils, Fox shocks all the way around, Thuren sway and track bars. Not happy with ride, especially at the rear. I did not swap rear coils, as I plan on towing a 5'er. What am I missing? tire pressures are also down to help with ride. Im bouncing around a lot. TIA
Click to expand...
You pretty much did the same build as me. I have rear factory air though which is harsher than coils so can't compare. Haven't driven it since installed the Thuren Sway Bar and Fox 2.0 ATS Steering Damper but happy with the ride thus far.

What tires you running and at what PSI? If I were you I would have changed out to the softer rear Thuren coils as well. Nice pair up to their Fox tuned shocks. That will definitely further help the rear harshness.
 
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Leonm228 said:
Looking for some feedback on ride. vehicle is 22' 2500 Laramie CCSB, I have Thuren 2" level coils, Fox shocks all the way around, Thuren sway and track bars. Not happy with ride, especially at the rear. I did not swap rear coils, as I plan on towing a 5'er. What am I missing? tire pressures are also down to help with ride. Im bouncing around a lot. TIA
Click to expand...
What is your tire pressures unloaded? Pressures down as stated is subjective and you may still be running too high.
What size tire are you running?
 
I am running the stock 285/60r20 Transforce A/T, 60 psi front/55 rear cold.
 
Electronut said:
You pretty much did the same build as me. I have rear factory air though which is harsher than coils so can't compare. Haven't driven it since installed the Thuren Sway Bar and Fox 2.0 ATS Steering Damper but happy with the ride thus far.

What tires you running and at what PSI? If I were you I would have changed out to the softer rear Thuren coils as well. Nice pair up to their Fox tunes shocks. That will definitely further help the rear harshness.
Click to expand...
Running soft rear coils will create too much sag in rear with a fifth wheel, which would then likely require airbags to level truck out.
 
Leonm228 said:
I am running the stock 285/60r20 Transforce A/T, 60 psi front/55 rear cold.
Click to expand...
That’s part of the problem. Need more sidewall and atleast jump to 35”. Also those tire pressures can come down some. Majority of tire companies have tire inflation charts for given size. Rear gives most of the ride qualities feel in trucks. Especially if you address the fronts end suspension.
 
Leonm228 said:
Running soft rear coils will create too much sag in rear with a fifth wheel, which would then likely require airbags to level truck out.
Click to expand...
Well you have some decision making to fix this but involves compromise and/or more money/equipment to correct. If you had the Ram Air from the factory that would have been your answer for the rear sag when you are pulling the 5th wheel but you don't so moot point.

I'm only pulling a 27' Airstream TT which when loaded is only about 7k pounds. Even though I didn't need the factory air I preferred it in the event I was towing heavy or loaded my motorcycle in the bed along with the AS hooked up as the truck would auto level itself. That and I didn't want to have to install another Airlift air bag system in this rig like I had to do previously which was inevitable if I didn't have the factory air. Only downside to the factory air is that the rear ride quality suffers and is more harsh when unloaded compared to a coil setup but for my use it's more pros than cons. Which is now a similar segway to your situation.

When your loaded with the 5th wheel that harshness/bouncing will go away and truck will smooth out. However your not towing 100% of the time your driving the truck so you have to evaluate how important the ride is to you when you are unloaded.

1. To me, the PSI your at seems OK. It's more the OEMs being the issue. They are not good tires. Bashed all over this forum. I also have the OEM 20" Night Edition wheels on my truck but I added 35" Nitto Recon Grapplers. Really like the tire BTW. Tires would improve your ride quality right there.

2. Get air bags in and change to softer rear Thuren Coils. That's what I would do if I were you. I have the Airlift system that I installed myself in our Chrysler Aspen including the onboard compressor with remote keyfob controller and also the phone app. Awesome system. You have total control of how much lift/PSI you want/need on the fly right from the driver's seat. OEM tires you can try keeping if you go this route as the suspension upgrade should compensate what the tires can't provide for improvement.

Me personally I would do 1.and 2. but that ups the cost more significantly. If your budget can handle it then do both. If not, I'd personally go with option #2.
firemansdiesel said:
That’s part of the problem. Need more sidewall and atleast jump to 35”. Also those tire pressures can come down some. Majority of tire companies have tire inflation charts for given size. Rear gives most of the ride qualities feel in trucks. Especially if you address the fronts end suspension.
Click to expand...
What he ^^^^said.
 
Electronut said:
Well you have some decision making to fix this but involves compromise and/or more money/equipment to correct. If you had the Ram Air from the factory that would have been your answer for the rear sag when you are pulling the 5th wheel but you don't so moot point.

I'm only pulling a 27' Airstream TT which when loaded is only about 7k pounds. Even though I didn't need the factory air I preferred it in the event I was towing heavy or loaded my motorcycle in the bed along with the AS hooked up as the truck would auto level itself. That and I didn't want to have to install another Airlift air bag system in this rig like I had to do previously which was inevitable if I didn't have the factory air. Only downside to the factory air is that the rear ride quality suffers and is more harsh when unloaded compared to a coil setup but for my use it's more pros than cons. Which is now a similar segway to your situation.

When your loaded with the 5th wheel that harshness/bouncing will go away and truck will smooth out. However your not towing 100% of the time your driving the truck so you have to evaluate how important the ride is to you when you are unloaded.

1. To me, the PSI your at seems OK. It's more the OEMs being the issue. They are not good tires. Bashed all over this forum. I also have the OEM 20" Night Edition wheels on my truck but I added 35" Nitto Recon Grapplers. Really like the tire BTW. Tires would improve your ride quality right there.

2. Get air bags in and change to softer rear Thuren Coils. That's what I would do if I were you. I have the Airlift system that I installed myself in our Chrysler Aspen including the onboard compressor with remote keyfob controller and also the phone app. Awesome system. You have total control of how much lift/PSI you want/need on the fly right from the driver's seat. OEM tires you can try keeping if you go this route as the suspension upgrade should compensate what the tires can't provide for improvement.

Me personally I would do 1.and 2. but that ups the cost more significantly. If your budget can handle it then do both. If not, I'd personally go with option #2.

What he ^^^^said.
Click to expand...
Thanks! I may look into the rear coils, and had planned on a better tire. I am guessing the current Fox shocks for stock coils are useless with the soft rear coils? Im sure there is info on here also, but is there anything to gain with the rear track bar swap?
 
Leonm228 said:
I am running the stock 285/60r20 Transforce A/T, 60 psi front/55 rear cold.
Click to expand...
You're definitely over inflated for unloaded weight. My Rebel has the same size tires (though they're DuraTracs, not Transforce's) and at my stock weight using the tire pressure charts I'm down to 45 front, 40 rear, and that leaves me with still an extra 300 # of capacity on the front axle and 500# on the rear.
 
Leonm228 said:
Thanks! I may look into the rear coils, and had planned on a better tire. I am guessing the current Fox shocks for stock coils are useless with the soft rear coils? Im sure there is info on here also, but is there anything to gain with the rear track bar swap?
Click to expand...
The Fox shocks are definitely helping the rear. They are valved better than the cruddy Mopar shocks. Call Chris @Thuren to be sure but you should be fine. Remember their shocks are tuned to run with their softer coils.

As for rear trackbar, ask Chris on that too. Many folks have done it but not sure how much that will benefit. That item would help for more when you are under load I think. I started investigating that mod and didn't think was worth the cost and the improvement result to install for my trucks use.
 
jsalbre said:
You're definitely over inflated for unloaded weight. My Rebel has the same size tires (though they're DuraTracs, not Transforce's) and at my stock weight using the tire pressure charts I'm down to 45 front, 40 rear, and that leaves me with still an extra 300 # of capacity on the front axle and 500# on the rear.
Click to expand...
You do anything for the annoying air pressure warning light at those PSI's?
 
Leonm228 said:
is there anything to gain with the rear track bar swap?
Click to expand...
It helps the side to side wiggle that the rear coils and geometry that some feel when towing, and/or in general. If you get bored and want to spend some money on your truck down the road, then go for it.
 
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