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11-24-2021, 10:16 AM #1
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Searching for 351 with 8,000 lb. axles.
This may seem kind of silly, but I'm trying to find a 351/M with the 8,000 lb. axles so I can take some measurements and determine the differences between spring hanger spacing, equalizer spacing, and any other obvious differences. I'm running about 500 lbs. over the GVWR of our 351 and I'm trying to find a reasonable way to address the issue. I'm located in Missouri, near Kansas City, but would be willing to travel to check out the trailer construction.
TIAHoward and Peggy
2019 Momentum 351M, and 2018 RAM Cummins dually 6-speed.
His: 1999 Honda Interceptor
Hers: 2013 Spyder ST-S
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11-24-2021, 02:45 PM #2
I have the 8K axles on my 398M. I am 99.99% sure that they are a straight bolt on. The axle spacing etc. would have to be the same in order for the tires to line up with the wheelwells.
I do think that you may need to beef up the spring hangers, as I do not think they were installing the "V clips" in 2019.Last edited by huntindog; 11-24-2021 at 03:03 PM.
2021 398M Full Body Paint 8k axles. LRH tires. Disc brakes.
Two bathrooms, no waiting 155 fresh, 104 black, 104 grey 1860 watts solar.
800AH BattleBorn Batteries No campgrounds 100% boondocking
2020 Silverado High Country 3500 dually crewcab Duramax Allison
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11-24-2021, 02:54 PM #3
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Thank you. Does the 390M have the option of 7,000 lb. axles, or does it come just with the 8,000 lb. axles?
Perchance are you located near Missouri?Howard and Peggy
2019 Momentum 351M, and 2018 RAM Cummins dually 6-speed.
His: 1999 Honda Interceptor
Hers: 2013 Spyder ST-S
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11-24-2021, 03:13 PM #4
Last edited by huntindog; 11-24-2021 at 03:15 PM.
2021 398M Full Body Paint 8k axles. LRH tires. Disc brakes.
Two bathrooms, no waiting 155 fresh, 104 black, 104 grey 1860 watts solar.
800AH BattleBorn Batteries No campgrounds 100% boondocking
2020 Silverado High Country 3500 dually crewcab Duramax Allison
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11-24-2021, 03:44 PM #5
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Well, that would certainly give us a good reason to spend some time in warmer climes.
Howard and Peggy
2019 Momentum 351M, and 2018 RAM Cummins dually 6-speed.
His: 1999 Honda Interceptor
Hers: 2013 Spyder ST-S
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11-24-2021, 09:48 PM #6
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I just updated to 4000lb Dexter springs. Part #072-079-00 Direct bolt on. I also added sumo springs.
Last edited by Cannon07; 11-24-2021 at 09:52 PM.
2021 351MR
2017 Jayco 377rlbh (sold)
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11-24-2021, 10:18 PM #72021 398M Full Body Paint 8k axles. LRH tires. Disc brakes.
Two bathrooms, no waiting 155 fresh, 104 black, 104 grey 1860 watts solar.
800AH BattleBorn Batteries No campgrounds 100% boondocking
2020 Silverado High Country 3500 dually crewcab Duramax Allison
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11-25-2021, 06:28 AM #8
It's a bolt-in provided you are sure to buy the narrow 4K springs and your wheels will accept the 9/16" studs. You will need the loaded axles, narrow springs, new U-bolts and plates, and a MORryde HD shackle kit to make it easy. You will need to reinforce the hangers or brace them (I prefer the latter). If an 8K axle owner give you their serial number, you can order the identical axle.
Rob & Nikki + Cloverfield
2020 Grand Design Solitude S-Class 3350RL
2015 RAM 3500 Longhorn Laramie Crew Cab, Long Bed, 4x4 Dually Cummins/AISIN
Mountains of Pennsylvania
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11-25-2021, 07:39 AM #9
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11-25-2021, 07:41 AM #10
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Need help with Imagine 2600 RL
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