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Message: [QUOTE="6.7 Powerstroker, post: 1494840, member: 25084"] One of the issues I'm having with the streetmax x is while in 6th it sometimes it starts to surge and I have to downshift or just completely lock it out of 6th unless I'm doing 70+. I'm running gear head sotf tuning I got from Powerstroke eng. I asked for revisions like 10 times and they used to say they'd get them. Now I just get no reply at all. I figured I'd change the gearing to get the rpms back up so it didn't feel like it was lugging in 6th at 55-60. [/QUOTE]

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My 1997 F-250

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