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Old 12-13-2020, 07:57 PM   #1
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4l85e to 6L90E transmission swap 8.1L engine

Hello,
I have a 2004 Itasca Sunova 27C Workhorse P32 chassis 8.1L Vortec engine 4L85E transmission.
Can the 2004 4L85E transmission be swapped to a 6L90E transmission? Any info would be greatly appreciated.
Tim
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Old 12-14-2020, 09:57 PM   #2
Winnie-Wise
 
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Swapping a modern transmission for an older one can be difficult and expensive. Most require a TCM that communicates over the CANBUS with the ECM and other modules. There might be an aftermarket kit? If not, you would likely need a lot of custom work, equipment and programming. Also, a local company here in San Diego makes over/under drives for motorhomes. Check out Gear Vendors.
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Old 12-15-2020, 09:07 AM   #3
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Thanks Old Navy, I'll check it out.
Tim
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Old 12-18-2020, 05:55 PM   #4
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Has anyone used GEAR VENDORS. There product looks good. Has anyone tried to use GEAR VENDORS multiplier on a 4L85E transmission, p32 Workhorse chassis 2004 27C. Any comments are greatly appreciated.
Tim
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