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Thread: Replace 65RFE with 66RFE - 2013 Ram 1500 2WD

  1. #41
    Advanced Tuner
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    Sep 2023
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    438
    My 2012 68RFE has well over 3000 parameters on the transmission end of the calibration

  2. #42
    Tuner in Training
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    Dec 2014
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    Quote Originally Posted by VPP1776 View Post
    is your truck 2wd or 4x4?
    2wd

  3. #43
    Tuner in Training VPP1776's Avatar
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    May 2023
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    Sparta, WI
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    Quote Originally Posted by rodslinger View Post
    2wd
    Being a 2wd I feel like it would be a simple physical swap for sure. But the tuning is the only issue I worry about. In theory them both being 6 speeds with the exact same hydraulic function it should work if we could suppress the ratio error codes or properly code the new ratios into the tune. I wish it were as simple as selecting 66RFE from the drop down and copying the gear ratios over in those tables. I know I want to give it a try one of these days, I have a customer with a 2012 1500 that just called me interested in giving it a shot today, so we may see sooner rather than later.

  4. #44
    Tuner in Training VPP1776's Avatar
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    May 2023
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    Update, the customer's truck is running the 66RFE without ratio error codes. Selected 66RFE in the drop down and changed the ratio parameters to match the 66RFE. A simple slip yoke and conversion u-joint had him moving.