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Message: [QUOTE="sethc24, post: 297793, member: 1917"] No it started happening 8 months after i installed the JW valvebody. As for power mods. Pretty basic. 4'" exhaust TB, 6637 and tuning from TDP. No i dont tow heavy. I romp on it sometimes. Not very much though. Tranny has 98,000 miles on it. Gearing is 3.73. It downshifts into 3rd and then the rpms surge up and no power. Some power in 3rd gear and then the rpms surge up again and no power. And it repeats this until you back out of the pedal. Best i can describe it. And the truck does speed up eventually too 120 km/h. The truck in general just seems to lack major power. As for a comparison. Our other truck a 2001 f350 with 7.3 psd, stock auto , 6637 intake and php tuning ( 80 hp dd tune) will absolutely destroy my truck. And thats running the "street" tune from TDP on my truck. [/QUOTE]

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76,000 lbs loaded tanker... no problem..

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