12 Bolt 3.54/3.55 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

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12 Bolt 3.54/3.55

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06-18-2016, 12:09 PM	#1
Howitzer Registered User Join Date: Feb 2012 Location: Calgary, Alberta Posts: 135	12 Bolt 3.54/3.55 I have a 402/700R4 with a lock up converter currently turning 3.08s. It's legs are too long right now on the highway, only getting 1500 RPM at 62 mph. I'm not sure about the 3.73s and I'm worried the 3.42s will still have me below a good bottom end power band area. Does anyone know if they make a 3.54/3.55 for the GM 12-Bolt Truck rear end?

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