GMT 900 Trucks General Discussion 2007 - 2013 Trucks | General Discussion

Engine Light at +100MPH

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Old 02-18-2011 | 11:26 PM
  #21  
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Originally Posted by USMC45
I plan on putting a Turbo on it in the near future so those 3.42's should come in handy.
That works also!! Never met a pound of boost I didn't like.
Old 02-20-2011 | 11:51 PM
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Got it looked at this weekend. Not exactly sure of everything done, but he changed some of the tables & added 10% more fuel at higher RPM's. Had it up to 115 with no problems, now I just gotta do something about the Driveshaft.
Old 02-24-2011 | 06:09 PM
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i had mine up to 135 once, with 3.42's out back and 265/70-17's. still no vibrations or anything bad....
Old 02-24-2011 | 10:30 PM
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1st gear
3.42 x 4 = 13.68
4.56 x 3 =13.68
2nd gear
3.42 x 2.3 =7.866
4.56 x 1.6 -= 7.29
so having 3.42s in a 6spd is an IDENTICAL first gear to having 4.56 in a 4spd and a more aggressive second gear

so pretty much 3.42s are perfect... especially in a single cab.... i bet that thing moves... btw i love the 3.42 gear in my 6.2L
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