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Message: [QUOTE="Roccafellas, post: 1553962, member: 28554"] Long story short, I’m a mechanic, I would like actual techs or professionals only respond. Thank you. Did up pipes and a tranny on a 6.4 Tranny is a #50 casting from a 6.0, Replaced the TC with a 6.4 TC Cut and spliced in a new TCM connector with the 10mm bolt going through it to the tranny..Old one had broken wires. Now when I drive the truck I get up to 3rd or 4th and it stays and will not shift. It’ll stay at 2500rpm or more and I can’t get over 60kmh Figured it’s stuck in 4x4 low as we used 4x4 low to put the truck up on the ramps when we did the work. Now when we switch the 4x4 switch on the dash, NO LIGHTS, Come on the dash indicating it’s in 4x4 or Low etc.. And the TCASE will not unlock the front driveshaft.. What does anyone think could of happened in the middle of a tranny swap? I was searching a GEM module can cause this. But it worked COMPLETELY FINE. Before. The job. Lights for 4x4 and switch worked perfect. Thanks. Sent from my iPhone using Tapatalk [/QUOTE]

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