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Old 12-03-2021, 09:00 AM   #1
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New Owner 2015 Seneca

Hello to Jayco Owners Forum,

I am a new owner of a 2015 Seneca HJ. This site is an amazing resource! Thank you all for your posts. I would like to especially thank ROBBYR and RUSTYNUTS for their posts. Y’all are the Seneca gurus! I definitely owe y’all a couple of cold beers. Your posts have saved me an amazing amout of time and have taught me a ton about this coach. Thank you gentlemen.
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Old 12-03-2021, 06:55 PM   #2
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Congrats on your new score.
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Old 12-03-2021, 10:54 PM   #3
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Congratulations and safe travels!
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Old 12-03-2021, 10:59 PM   #4
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Welcome to the club! You’ll love it.
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2015 Jeep JKU Rubicon

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Old 12-13-2021, 02:20 PM   #5
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What are your thoughts so far in regard to power to weight ratio with that set up when climbing hills?
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Old 12-13-2021, 04:41 PM   #6
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What are your thoughts so far in regard to power to weight ratio with that set up when climbing hills?
I am happy with it so far. I am looking into the Cummins uprate and transmission shift schedule change that has been talked about by other owners on the forum.
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Old 12-13-2021, 04:58 PM   #7
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I am happy with it so far. I am looking into the Cummins uprate and transmission shift schedule change that has been talked about by other owners on the forum.
I had both upgrades, huge difference. But my transmission came (mistakenly) programmed with an "ultra economy" shift schedule as "primary". Our transmission control modules can hold two shift programs but Freightliner/Jayco provided no way to switch between them. It has to be done by hooking the rig up and changing the shift schedule. A number of folks had Allison change the performance shift schedule to "primary". I (and a few others) had a custom performance schedule uploaded provided by Allison. In my case it made my rig perform like a totally different animal. And the extra power provided by a Cummins horsepower/torque uprate was icing on the cake.

I used to be in the line of semi trucks slogging up the long interstate grades with my hazard flashers on. Now I am passing all those trucks. Obviously there are some very long and/or steep hills where I'm slowed below the speed limit, but nowhere near like before!
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