kmb1966ExplorerSep 11, 2018Brazel's Ford V10 Ultrapower Tune - Update!This is an update to an older post regarding my installation of Brazel's Ultrapower Tune. Originally I installed this tune on my 2001 Itasca Suncruiser with(Ford F53 V10) and could not determine any...Show More
PaulJ2ExplorerSep 11, 2018My guess is it keeps the torque converter locked up and allows the engine to lug down a bit more on hills before shifting.
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