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Old 04-28-2019, 12:32 PM   #1
Holiday Rambler Owners Club
Join Date: Aug 2012
Location: Oak Harbor, WA
Posts: 82
Thumbs down Allison 1000/2100/2500 family limits

Just a little background: Last Christmas we had a valve problem on our 2005 Cummins 5.9 CR engine that required an engine change. Cummins does provide an EGT on those engines and I decided that I wanted one. Since I was spending time in Southern California I decided to have the Banks Power Pack installed. I knew going in that I couldn't use the added power without exceeding the limits of the transmission but it was worth it to me just be able to monitor EGT.

I have read many posts that discus the limits the 2500 transmission and how they can not be upgraded. But as time goes by and I read about these monster Duramax engines in the pickup trucks I can't help but wonder how they are putting all that HP through the 1000 transmission since it is the same basic transmission as the 2500.

Any thoughts?

2006 Holiday Rambler Neptune 37' - New Source Engineering Trailing Arms and REK
2013 Chevy Sparc Toad
1970 Jeepster Commando (future toad???)
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Old 04-28-2019, 12:49 PM   #2
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Join Date: Apr 2011
Location: Powell River, B.C.
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The ratio of power to load is the rest of the story , as the vehicle comes closer to GCWR of the transmission , the harder the excess HP is on the drive line.

A pick up truck with excess HP for a 1000 series would just spin the tires or break a drive shaft/differential, where there is little chance of a motorhome doing the same.

Also ( JMHO of course ) most owners of pick ups with the BIG power , don't care if they're at home in the garage every second weekend repairing/replacing parts, it's all about bragging rites .
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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