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Old 07-16-2019, 10:19 PM   #1
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Shocks, is there a time you know when change is needed

Our coach rides incredibly well and really no problems to speak of. The one thing we've noticed lately is at highway speeds and going over a bump in the highway we seem to get a lot of porpoising. It doesn't last long but wonder if this is a sign we need to upgrade or change. It's our first coach so we don't have experience to go on.
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Old 07-17-2019, 05:36 AM   #2
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Quote:
Originally Posted by brandss View Post
Our coach rides incredibly well and really no problems to speak of. The one thing we've noticed lately is at highway speeds and going over a bump in the highway we seem to get a lot of porpoising. It doesn't last long but wonder if this is a sign we need to upgrade or change. It's our first coach so we don't have experience to go on.
You are due for sure, my 32 sa benefitted from day 1.

Go with KONI shocks and I would not order from Shock Warehouse. You will have a much better experience from Ultra RV.
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Pete , Stroudsburg , PA. 2017 Tiffin 32 SA 24K Chassis
Sumo Springs, Safe T Plus, F&R RM SB, CHF,R-TB,Front Koni FSD Quad Shocks,Rear Koni FSD Quad Shocks,2019 Jeep Cherokee Trailhawk Elite
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Old 07-17-2019, 08:35 AM   #3
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THAT is exactly what shocks are supposed to minimize. Replace yours with Koni FSD shocks (expensive) and you will notice the difference.
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Old 07-17-2019, 11:15 AM   #4
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Thanks for the replies. Is this something the average person can do themselves? It's been a long time since I replaced shocks in anything. From the videos I've looked at it looks fairly straight forward. Like the idea of shooting the bolts with wd 40 for several days before replacement.
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Old 07-18-2019, 05:24 AM   #5
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Thanks for the replies. Like the idea of shooting the bolts with wd 40 for several days before replacement.
Your Welcome, I would use PB Blaster on the threads instead of WD 40.
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Old 07-18-2019, 08:04 AM   #6
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I talked to a guy on Facebook last week that reported he replaced his shocks with Koni's on his 40' Freightliner-based Phaeton and didn't have to take off any wheels or anything. For the fronts, he just cocked the wheels so that he had easy access to the shock bolts from the side of the coach. He had to crawl underneath for the rears but he didn't have to jack the coach up first. He claims he replaced all 4 shocks in only a couple of hours. Adding a fudge-factor for problems and inefficiencies, I'm planning on a full day for installation. The guy I talked to indicated that having an impact wrench available to bust the nuts loose was a big help. I'm fortunate that I have a large set of pneumatic tools at my disposal for the installation. A 1/2" breaker-bar from Harbor Freight will probably also be a big help.

I have my 4 Koni shocks waiting for my installation in my shed. I've already started hitting the bolts with PB-Blaster (great stuff) every couple of days. I'm hoping the weather cooperates this weekend for my installation.

SIDE NOTE: The discussion I was having with him wasn't directly related to porpoising but more relative to hard jarring I was experiencing when crossing bridge transitions and minor road defects. He felt that I would benefit from a new set of shocks.
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Old 07-18-2019, 11:55 AM   #7
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I replaced the Sachs OEM with Koni shocks this morning on the front of our Bus. It took me about an hour.

On the front axle, you need a 15/16" socket and open end wrench. You will also need a 5/16" hex key and I used some blue loctite when I put on the new nuts.

The bottom nuts are readily accessible, the top nut is harder to get to. I turned the wheels to provide more work room.

Our Bus has 4k miles on it, our previous experience with Konis on our 2011 Allegro Bus was impetus to change. The ride on the 2019 is very good, we look forward to better and quieter pavement transistions.

I used jackstands as an extra safety measure.
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Old 07-18-2019, 03:22 PM   #8
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What is the 5/16" hex key for?
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Old 07-19-2019, 12:05 PM   #9
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What is the 5/16" hex key for?
The Koni shocks have 5/16" socket in the end of the mounting pin so you can prevent the shock from turning as you tighten the mounting nut.

One other thing I used was a strap wrench around the old shock to prevent it from turning while I removed the mounting nut.
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Old 07-19-2019, 10:10 PM   #10
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What torque value on the mounting nuts?
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Old 07-20-2019, 08:11 AM   #11
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Well, I went out this morning before the sun came up and started getting hot and got a set of Koni shocks installed on the front of our '07 Phaeton 40QDH with 55k miles. As reported previously here,the install was straightforward. I didn't have cock the wheels to gain access or do any jacking. I just shimmied under the motorhome as it sat and got them installed. I timed myself. It took exactly 1 hour to install the two fronts. (I had collected the necessary tools in a box the night before so I wouldn't have to hunt around. Now, I need to look at the rear shocks.
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Old 07-21-2019, 10:35 PM   #12
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What torque value on the mounting nuts?
According to the info in the Koni box, 74 ft lbs.
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Old 07-22-2019, 09:13 PM   #13
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According to the info in the Koni box, 74 ft lbs.


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Old 07-23-2019, 07:31 AM   #14
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Originally Posted by Peter M View Post
You are due for sure, my 32 sa benefitted from day 1.

Go with KONI shocks and I would not order from Shock Warehouse. You will have a much better experience from Ultra RV.

I agree - KONI yes and Shock Warehouse - absolutely NOT!
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