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03-09-2019, 08:45 AM
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#1
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Senior Member
Join Date: Jan 2017
Location: Titusville, FL
Posts: 5,164
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26K Rear Axle Bump Stop
I was under the motorhome yesterday just looking around. It's a Newmar on a 2018 26,000 pound F-53. I noticed that the distance between the top of the rear axle and the bottom of the bump stop is probably a little less than an inch on both sides. That's with the jacks retracted on a perfectly level site. I just weighed at the CAT and am not overweight on any axle or GVWR. Anybody else have one similar and what kind of clearance do you have?
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2023 Grand Design 2600RB, 2022 F-350 King Ranch tow vehicle, Titusville, FL when not on the road
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03-10-2019, 08:59 AM
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#2
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Senior Member
Join Date: Jan 2014
Location: Safety Harbor, FL
Posts: 2,528
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Quote:
Originally Posted by hohenwald48
I was under the motorhome yesterday just looking around. It's a Newmar on a 2018 26,000 pound F-53. I noticed that the distance between the top of the rear axle and the bottom of the bump stop is probably a little less than an inch on both sides. That's with the jacks retracted on a perfectly level site. I just weighed at the CAT and am not overweight on any axle or GVWR. Anybody else have one similar and what kind of clearance do you have?
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My 18k Chassis has about 3 1/2" of travel to bump stop:
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2022 Thor Palazzo 33.5
2016 Jeep Wrangler Unlimited Rubicon Toad - Readybrute Elite Towbar
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03-10-2019, 10:39 PM
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#3
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Senior Member
Tiffin Owners Club Ford Super Duty Owner
Join Date: Jun 2016
Location: Town of Beloit
Posts: 363
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not much
2016 Tiffin 24k chassis and at rest about the same between axle and bumpers , not overweight.
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2016 Tiffin 34PA, 2018 Ford Edge toad, Blue OX rear track bar, Cheap handling fix, Konis, Super Steer retired Ford tech/service manager, No Worry, No Hurry. "Livin The Dream" 
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03-11-2019, 04:34 PM
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#4
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Senior Member
Join Date: Nov 2008
Location: Kennewick, Washington
Posts: 413
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Check the front axel stops, they are probably less than that. That's the reason people complain about a "jarring ride". The axels hit the bump stops because the springs flatten out quickly on the heaver chassis.
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2004 Flair 33R, 336 watts solar, Dometic Sidewise frig. Pan hard bars, front and rear, CHF, Timbrens front and rear, Roadmaster reflex steering dampener. Doug Thorley Tri-y headers, Ultra RV tune.
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03-11-2019, 05:22 PM
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#5
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Senior Member
Join Date: Jul 2014
Posts: 35,446
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Quote:
Originally Posted by wildmanbaker
Check the front axel stops, they are probably less than that. That's the reason people complain about a "jarring ride". The axels hit the bump stops because the springs flatten out quickly on the heaver chassis.
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If the axles were constantly crashing into the bump stops, they would be falling apart.
The harsh ride is because the springs are very stiff and don't flex much at all.
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03-11-2019, 06:43 PM
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#6
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Senior Member
Join Date: Jan 2014
Location: Safety Harbor, FL
Posts: 2,528
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Pretty surprised the heavier chassis is around an inch of travel, that's pretty horrible especially compared to my 18k with 3 1/2" travel front and back
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2022 Thor Palazzo 33.5
2016 Jeep Wrangler Unlimited Rubicon Toad - Readybrute Elite Towbar
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03-12-2019, 09:24 AM
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#7
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Senior Member
Join Date: Nov 2008
Location: Kennewick, Washington
Posts: 413
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Quote:
Originally Posted by jharrell
Pretty surprised the heavier chassis is around an inch of travel, that's pretty horrible especially compared to my 18k with 3 1/2" travel front and back
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That really is not that much travel if you thing about it. Its easy to find out if you are hitting the bump stops. Put children's clay on the top of the spring using tape to try to keep it in place, and take a little ride. See if the clay is still there at the end of the little trip. Ford springs seem to sag very easily.
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2004 Flair 33R, 336 watts solar, Dometic Sidewise frig. Pan hard bars, front and rear, CHF, Timbrens front and rear, Roadmaster reflex steering dampener. Doug Thorley Tri-y headers, Ultra RV tune.
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