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Thread: 05 2500HD 6.0 4X4 ECSB What Gears?

  1. #21
    Join Date
    Mar 2010
    Location
    Midland, TX
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    479
    Ha, no I don't know much about cleaning equipment. My efforts at washing my truck out here is a lost cause.
    - 5.3 Stock Internals - Cal Speed Stainless LT's - 18" Magnaflow - K&N Drop In - Airaid Intake Tube - Nelson Tune -

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  2. #22
    Join Date
    Apr 2007
    Location
    Utah
    Posts
    71
    I run 38s, have horrible drag due to the hummer body but am light weight ( fiberglass body) and am running 4.56 and tend to run about 2200 to 2300 on the highway at 65. running slow, never past 55 and being very careful with acceleration and doing alot of coasting (I know boring) I have averaged 18mph over a tank or two when I was tracking it.
    1990 K2500 with Hummer Kit Body, LQ4, 4l80e 4x4

  3. #23
    Quote Originally Posted by kdog View Post
    I run 38s, have horrible drag due to the hummer body but am light weight ( fiberglass body) and am running 4.56 and tend to run about 2200 to 2300 on the highway at 65. running slow, never past 55 and being very careful with acceleration and doing alot of coasting (I know boring) I have averaged 18mph over a tank or two when I was tracking it.
    Wow thats amazing, they dont even get that stock. Must be one of those miracle truck that get milage no one else gets.

  4. #24
    Join Date
    Mar 2007
    Location
    Newark, Delaware
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    931
    Gearing trucks with 80E's is kind of tough. You want to gear low to help with the 80E's 2.48 first gear, but you also want to take into account the .75 overdrive. If Stevens calculations are correct, then 5.13's seem to be the better choice, IMO. And when you have a truck that's lifted 8" with 37s, how often are you going to be driving faster than 70mph anyway?
    Big slow mud truck with a TUNE!!!!!!

  5. #25
    Join Date
    Sep 2010
    Location
    middle tennessee
    Posts
    94
    +1 ^
    99 silverado 2500 4x4 ec lb, lq4 with 243 heads, pace setter long tubes, true duals with x pipe and bullet mufflers, comp 222 224 112 cam, 8.1 truck injectors, 4l80e with 2800 stall, 373 gears, 285 75 16 tires, efi live tune in progress, 350rwhp 360tq, 11.8 average mpg mixed driving

  6. #26
    Join Date
    Apr 2007
    Location
    Utah
    Posts
    71
    Quote Originally Posted by 6.0vortecchevy View Post
    Wow thats amazing, they dont even get that stock. Must be one of those miracle truck that get milage no one else gets.
    Yea, I wasn't expecting it and so I kept tracking through several tanks just to be sure. My wife is going to end up in a stock suburban and is not happy that my tank gets better milage. Freak combination, course if I am not tracking and driving careful I am probably not in the same category.
    1990 K2500 with Hummer Kit Body, LQ4, 4l80e 4x4

  7. #27
    Join Date
    Apr 2009
    Location
    Roosevelt UT
    Posts
    26
    not meaning to bring up the argument here---i have 4.10 with a 4" and 305/55/20. was wanting to go with 4.56 but from everyones responses i need lower? i tow quite a bit in the summer with the boat, camper ect... not looking for fuel meilage, that went out the window when i bough this truck. just looking for more off the line performance and not having to see whose slower between me or the loaded semi up the hills! i know this is like putting a band aid on a broken leg but i dont have 60 grand for the new duramax i want.
    09 kawasaki teryx-monster sport
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    98 caravelle 209 br
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  8. #28
    Join Date
    Aug 2007
    Location
    Honeywood, Ontario
    Posts
    6,994
    4.88s
    2006 Silverado
    Little Black Bitch

  9. #29
    Join Date
    Feb 2007
    Location
    Sallisaw OK
    Posts
    2,194
    yeah 4.88's would be good for it blacklt1. 5.13's may be a little too much unless you plan on getting a taller tire at some point.
    1996 gmc ext cab short bed
    6.6L 4l80e
    MY GARAGE

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