cansled

Timbrens work in the same principle in that they raise the back of the truck to help level it out and take some of the sag off of the springs. The main difference is that they are non-adjustable and replace the axle bump stops with a progressive style rubber spring that is attached with a bolt in the same location as the original bounce stops. Unloaded they sit a couple of inches above the axle and do not make contact with the axle. When you lower the camper they make contact with the axle padse and take some of the pressure off the springs. ... increasing ride height. Some complain they notice a difference in ride quality unloaded but I haven't. What I meant in my previous post was you could easily remove them for the winter or when you're not using them if you wanted to.

See my post below. Went from a 2015 LTZ (conventional shocks) to 2018 Denali (magnetic shocks) and noticed the same problem. I was totally surprised by the ride difference. I couldn't find an air bag solution to work with Denali, so the solution for me was to put on Timbren SES to raise the ride height when towing, putting the shocks back into their sweet spot. Towed all summer including a two week trip with no problems. Ride quality was virtually the same unloaded, except on very harsh large bumps as you could tell the Timbren's might of come in contact with the axle. They are very easy to remove for the rest of the season if you choose to when done camping. (one bolt per side). Good luck.

Michigan and Northern Ontario. Wish I could help you there. I have a different wheel and tire combo for the winter. I have not found better traction in the winter than running dedicated winter tires. Mine are Hankook Winter iPike tires and would never go back to all season in the winter. It is not only about moving ahead, but stability, tracking, and stopping as well. This way I get to run the tires I want in the summer and not worry about winter traction. Yes I have an up front cost, but each set lasts longer because I only run them half a year at a time.

Yeah that's CR for you. There are many reports of how well these tires work off-road elsewhere. Lets face it, other than winter many of these tires will see 90% asphalt during their lifetime. I just wanted a extra traction without sacrificing road manors. I think these Continental Tires do a great job of meeting those demands.

Here is a link to the CR report found on Continental's website comparing the AT tires including the Falken, GY, Mich, Yoko, others people are talking about: http://www.continentaltire.com/sites/default/files/consumer-reports/CR_TerrainContact.pdf

Here are the Continental ATs on my truck (285/45/22). I have about 3000 miles on them now and all of the positive reports on these tires so far are true. Very quiet, softer ride than my Bridgestone Duelers, aggressive styling, balanced great, and awesome wear rating. Consumer reports ranked them the best AT tire....I know I'm not a fan of CR either, but after reading the reviews, seeing them in person, and installing them, I am sold on them so far. Here are some pics.

Well put on the Timbren's and the ride quality when towing has dramatically improved. The truck only drops about 2 inches with the trailer hooked up and I think that the Timbren's put the height in the 'sweet' spot for the Magnetic shocks as I could 'feel' the suspension working with a much softer ride. Without the trimbrens the drop was much more significant, putting the shocks near the bottom half of their travel increasing the firmness of the shock. Feels much more like my 2015 now. Still have some fine tuning with WD hitch and more miles to compare, but I am much happier now. IF that was the problem I am surprised as I thought the Magnetic shocks were BETTER, because they "can tighten and loosen when necessary, the system allows the best of all worlds: a firm, tight ride when cornering and a comfortable, loose feel over bumps."! PS.....I have driven it for a week with timbrens installed, Going over railroad tracks and frost cracks on Michigan roads and have not noticed any change in ride quality when not towing. I will keep you updated once I put more miles on. Thanks.

2018 GMC Denali

Timbren helper springs came in today. So I will try this out first to see if it brings the shocks back into the "sweet spot". However, this bothers me as GM says the Magnetic Ride adjusts for all conditions, preserving the ride. They also say 70% of Denali owners tow with their vehicle. This should not be something I have to add, just to make it work right....especially since I didn't need it on the 2015. I will keep you posted on the results. Ron: Is there a way I can check if the axle is twisting myself. I might see if the dealer will let me hook up my trailer to another Denali and see if it feels the same.

It is perfectly smooth unloaded. Loaded it is much harsher than my 2015. My wife and daughter both noticed it and asked me what was wrong with the truck.

Yes same 22 inch wheels. Had the same wheels on my 2015. I am wondering that the weight of the trailer might put the shocks closer to the bottom of the travel increasing damping and stiffening the shocks. The only thing I can think about is the magnetic suspension. I wonder if put in a set of timbren helper springs on would increase the ride height putting the magnetic shocks back into their sweet spot.

Just took my first trip towing with my 2018 Denali CC and it rode much, much rougher than my previous 2015 LTZ CC. I am pulling the same trailer with the same WD hitch. All measurements done right with within the same specifications of the 2015 with both the truck and trailer sitting level. The height the trailer dropped the rear 4-5 inches (700 pound tongue), exactly the same distance as my 2015 and NEVER had the same problem. It rode like I had almost no rear suspension travel and the rear shocks were very stiff. Every bump in the rear suspension was felt. When I got out and jumped on the bumper there was very little up/sown movement. It tracked great, no sway, and of course did not porpoise with the stiff shocks. On a flat road it wast perfect. Unloaded suspension functions normal. Anyone have the same issue with this Magnetic Ride Suspension?

I actually have a different truck now that I am leasing and did not put the exhaust on the new truck. However, the thing I miss most about that truck was the sound. I removed both the res and the flapper and was extremely happy. Tried with the resonator and was very disappointed. Not sure how it will sound if you go with the Sport model. Good luck.