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General Discussion
6L80 Tap shift issue
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<blockquote data-quote="tcDawg" data-source="post: 756346" data-attributes="member: 3417"><p>2004 LJ, LY6 with 6L80 trans</p><p></p><p>I originally used a Speartech module for tap shift on a switch, worked fine.</p><p></p><p>Swapped to a Winters Shifter with RADesigns tap shift connectors/resisters about 3 years ago and it has always worked fine. Worked great actually, it is the only way I wheeled...always in manual mode, it was great to always have the gear you wanted.</p><p></p><p>Recently did a Cam swap and higher stall torque converter(also new headers and exhuast). Took it for a Dyno tune and tap shift would not work at the tuners. Tuner did his tune, motor runs well and the trans shifts well in regular auto mode.</p><p></p><p>Went to trouble shooting the loss of tap shift yesterday and cannot figure out why the trans won't shift in manual mode:</p><p>- checked all the tap shift wires at the shifter and at pin 7 in the trans plug, they have the appropriate ohm rating per Rory(RADesign) and Speartech(can't remember the ohm rating at the moment but at the time of testing we had Rory on the phone and he confirmed our ohn rating was correct, something like 1.5 for down shift and 4.425 for upshift.</p><p>- checked with a snap on scan tool and when clicking a down shift or up shift, the scan tool showed that the trans was getting the signal to up or down shift but there was no physical shift of the gear</p><p>- put the old motor and trans tune on, it idled like **** but it ran. Same thing, no manual trans shift.</p><p></p><p>Anyone have any ideas on this?</p></blockquote><p></p>
[QUOTE="tcDawg, post: 756346, member: 3417"] 2004 LJ, LY6 with 6L80 trans I originally used a Speartech module for tap shift on a switch, worked fine. Swapped to a Winters Shifter with RADesigns tap shift connectors/resisters about 3 years ago and it has always worked fine. Worked great actually, it is the only way I wheeled...always in manual mode, it was great to always have the gear you wanted. Recently did a Cam swap and higher stall torque converter(also new headers and exhuast). Took it for a Dyno tune and tap shift would not work at the tuners. Tuner did his tune, motor runs well and the trans shifts well in regular auto mode. Went to trouble shooting the loss of tap shift yesterday and cannot figure out why the trans won't shift in manual mode: - checked all the tap shift wires at the shifter and at pin 7 in the trans plug, they have the appropriate ohm rating per Rory(RADesign) and Speartech(can't remember the ohm rating at the moment but at the time of testing we had Rory on the phone and he confirmed our ohn rating was correct, something like 1.5 for down shift and 4.425 for upshift. - checked with a snap on scan tool and when clicking a down shift or up shift, the scan tool showed that the trans was getting the signal to up or down shift but there was no physical shift of the gear - put the old motor and trans tune on, it idled like **** but it ran. Same thing, no manual trans shift. Anyone have any ideas on this? [/QUOTE]
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