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Thread: Gears Done... Finally!

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  1. #1
    Join Date
    Feb 2007
    Location
    Sallisaw OK
    Posts
    2,194
    what is the rpm at 70 mph? i am having 4.56's put in mine and probably a 37" tire. ill be getting the same diff covers also. i got the tranny pan which holds an extra 4.5 quarts already, they make some really nice covers. i dont know how well they would do being bashed on rocks compared to a steel cover but they are definitely quality.
    1996 gmc ext cab short bed
    6.6L 4l80e
    MY GARAGE

  2. #2
    Join Date
    Mar 2009
    Location
    Fort Worth, TX
    Posts
    47

    Talking

    Quote Originally Posted by 567234ta View Post
    what is the rpm at 70 mph? i am having 4.56's put in mine and probably a 37" tire. ill be getting the same diff covers also. i got the tranny pan which holds an extra 4.5 quarts already, they make some really nice covers. i dont know how well they would do being bashed on rocks compared to a steel cover but they are definitely quality.
    Definitely go with the 4.88's, after hearing how Steve's truck acts with the 4.88's and 35's, that is the route I would go especially with 37's. I'm just waiting for the money fairy to visit me so I can put them in mine. He keeps visiting Steve instead of me apparently.
    '03 GMC 2500HD CCSB SLT/6.0/AFE Stage 2 Cold Air/Magnaflow Cat Back/ 8in Fabtech Lift/ 37x12.50x17 Cooper Discoverer's/ 17x9 Raceline Wheels/ Debadged/ Vortec Performance Tune (COWL327)

  3. #3
    Join Date
    Feb 2007
    Location
    Sallisaw OK
    Posts
    2,194
    well ive already got the 4.56's just not installed yet. with a 37" it should make it pretty close to stock rpms.
    1996 gmc ext cab short bed
    6.6L 4l80e
    MY GARAGE

  4. #4
    Join Date
    Sep 2007
    Location
    San Antonio
    Posts
    194
    Quote Originally Posted by 567234ta View Post
    well ive already got the 4.56's just not installed yet. with a 37" it should make it pretty close to stock rpms.
    let me have them so I can run them with my 33's lol


    Let me tell you what Melba Toast is packing here allright............

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