The 3000 series is for 7k and the 4000 series is for 8k. See the MorRyde brochure and or website.

When you changed to IS, did that $3750 include tires and wheels?

Which bearings are included? Timken or Chinese?

I had purchased Goodyear 17.5’s about 3 months before I purchased the RW.. When I got the RW, I had my dealer jack up both and swap wheels and tires.. So the RW had 17.5” tires that had 300 miles on them ( less than if transport delivered from Indiana) ..
I upgraded to Timken bearings when I installed the IS. That was on my dime, MORryde just insta;led them for me, I have a distributor at work that hooked me up.. All I did was hand them to Sergio when at MORryde, he did the rest.

GIP- thanks for your welcomed guidance. Lippert was consulted. The distance between the spring center and hub face is too short per Lippert and was based upon the data label on each of my axles that Lippert reviewed. Michael, at Performace Braking (Ron's previous Titan Brakes business) states that this is the first time he has been told this about a Redwood. As you noted I will dig deeper. As I average about 700 miles or so a year on our 2013 Redwood RL (nearby state park then back to covered storage) the axle and spring upgrade seem to make more sense over the premier IS upgrade for road warriors. Michael is getting me a quote on just upgrading the leaf springs to 4K pounds (4-sets at 4K# each) if they can fit without interference issues to the center hanger.

I have had the IS and disc brakes on our coach for over 5 years now. When we did it in February of 2013' it was $6150 total for the 8k IS and Kodiak disc brakes, installed at MorRyde. Swallowed hard before we made the decision and talked about it quite a bit. After the second time we had an issue stopping with the drums (and yes they were adjusted and not full of grease), and also had stuff moving around in the coach, we did it. At that time, I think Michelle was the only one on the forum that had the IS and I talked to her quite a bit.

I think a big part of your decision needs to be how you are going to use the rig. We knew we were planning on going fulltime and even before that we would be towing a LOT. We made the decision to do it. At the time our coach already had G614 Goodyears so we did not change tires.

Was it money well-spent ? A resounding YES ! Tracy will tell you the same thing. The entire rig feels totally different. Rock steady, absolutely no sway in the crosswinds, even bad ones, and everything feels totally "connected ". Over the years, I have replaced th failing TriGlid pinbox with a MorRyde and also got rid of the 25k Reese hitch that we hated and replaced it with a Comfort Ride Hitch. Even before the hitch and pinbox, the difference was nothing short of amazing. Now with them , there is just more improvement.

In the five years, we have towed more than 33,000 miles after the conversion with absolutely no failures but more importantly, virtually no concerns.other than tires. I changed our Goodyears last summer because of time and went to H rated Sailun. I have minimal maintenance, have no "buggy spring crap suspension " to be concerned with and couldn't be happier. When we are on the road, virtually nothing moved around in the coach and even more impressive is the ride in the truck. Unless we hit a bridge joint that would throw a dump truck, the most we get is a "head bob". Tracy spends most of her time either reading on her iPad or a book. It's that good and that much of a difference.

And for those of you on the East Coast that are familiar with I 95 - going through South Carolina is for us a minor inconvenience, not an "event".

Bottom line, in my case, we have no regrets about spending the money and if there was ever another fifth wheel in the future, it would have IS, Disc and H rated tires or it wouldn't be behind my truck.
As the saying goes, your mileage may vary, but unless you own a rig with it, don't knock it.

Just my opinion

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The 3000 series is for 7k and the 4000 series is for 8k. See the MorRyde brochure and or website.

Not sure where you are seeing that, but the 4000 series are not for the 8K, they don't even work with the 8K. See the last line of the website. (Keep in mind Mor-Ryde is not overly famous for publicizing accurate information). When I did call, they verified the 4000 would not fit the 8K axles

I had one of the first Redwoods with the 8K axle option, including disk brakes and G614 tires. The problem with the 8K springs is that the 2nd leaf is much longer and strikes the schackle (at least on our 2014). Redwood originally sent me a set of the same shackles to fix them, but obviously that didn't fix them. Years later they said they were originally mounting the the spring hangers in the same place as the 7K springs, when in fact the 8K springs are longer. They said the fix was to shorten the shackles in the center and they sent me some shorter ones.

I was getting tired of messing with it after having 3 5th wheels with jacked up Lippert designs, so I made an appointment with Mor-Ryde to get the IS installed, and then just decided to trade altogether for a different approach.

RC - I wouldn't mess with "buggy parts" anymore if you don't have to - just pop for the IS.

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Thank you for posting those photos of leaf spring interference. I had seen those photos before and mentioned that possible interference issue to Michael at Performance Braking yesterday. I will pass the photos along to Michael if that's okay.

I will pass the photos along to Michael if that's okay.

Sure, no problem.

In consultation with Ron (aka titanguy) I replaced my 3.5k springs with 4k Dexter springs and Dexter EZ Flex equalizer. Just crawled under and have no clearance issues with the shackles and leaf.

Paul,
Thanks for the feedback which is encouraging. Michael, at Performance Braking has Atom Ant's interference photos. I am somewhat hung up on the spring issue as MOR/Ryde had to repair the front street side spring while installing the their heavy duty shackle links, bushings and bolts. Our Redwood had about 1,500 miles (3-years old at that time) on it, which includes the factory to dealer mileage. I had a 6 AM appointment at the Elkhart plant with a two hour estimated job. The spring issue added another six hours to the job. To my grateful surprise they stuck to their original dollar quote. As I baby my Redwood, and a very proud owner, a spring failure was alarming. The Escapees weigh-in had me safely under weight on each wheel. I understand from this form the possible cause and decided to beef up the springs to 4K sets prior to the upcoming Shipshewana rally. With the 17.5 inch H-rated tires and upgraded springs (hopefully) the trip should be be less of a white knuckle trip than the previous one when the Bremen, IN RV shop enjoyed my RV for three weeks while repairing the blowout damage (which included adding the buffet and new furniture). The other folks that enjoy my Redwood is the covered storage facility for 9-months a year! When Carol retires in a few years we plan to visit many areas across the U.S. at which time an IS system could be installed.