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Old 04-28-2019, 12:32 PM   #1
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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?
John.
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Old 04-28-2019, 12:49 PM   #2
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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 .
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