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55mph at 3000 RPM

Discussion in 'The Garage' started by mountainexplorer, Jun 29, 2004.

  1. mountainexplorer

    mountainexplorer 1/2 ton status

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    55 mph at 3000 RPM turing tires that measure 29.5" tall.

    My thought is 4.10's. The sticker in the glove box says factory 4.56's.
     
  2. joez

    joez 1/2 ton status

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    Are you asking what it is? If so, yes, that would be 4.56 gears.
     
  3. jjlaughner

    jjlaughner 3/4 ton status

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    I'll trade ya 3.73's and an open diff for your diff /forums/images/graemlins/grin.gif I have 4.56 gears but need a carrier /forums/images/graemlins/wink.gif

    I was surprised I was in the DD today 3.08s and 35's with the 700r4 in D (not OD) and it cruised at 1800RPM at 55MPH
     
  4. mountainexplorer

    mountainexplorer 1/2 ton status

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    I'm hoping they are 4.56's, but the last Crew Cab I had that said it had factory 4.56's had been swapped out to 4.10s by someone.

    I could really use the 4.56's more than 4.10's.
     
  5. mountainexplorer

    mountainexplorer 1/2 ton status

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    [ QUOTE ]
    I'll trade ya 3.73's and an open diff for your diff I have 4.56 gears but need a carrier

    [/ QUOTE ]

    These are in a 14 Bolt FF rear and 60 front. What do you need a carrier for?
     
  6. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    [ QUOTE ]
    I was suprised I was in the DD today 3.08s and 35's with the 700r4 in D (not OD) and it cruised at 1800RPM at 55MPH


    [/ QUOTE ]

    I have 33's and same gears , in D I got 1500-1600 rpm @ 55mph . Truck still pulled though . Shifted OD at 65 mph @ 1900-2000 and got back to 1600-1700 /forums/images/graemlins/k5.gif
     
  7. jjlaughner

    jjlaughner 3/4 ton status

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    14bff 4.56 carrier, using a 10bolt /forums/images/graemlins/whistling.gif up front with 4.56's and an auburn, then I have a 14bolt I need to get 4.56's in (I have non-thick gears), so I need a 4.56 carrier. Also need to make the 8lug 6lug but thats another story...
     
  8. joez

    joez 1/2 ton status

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    They are, i did the math before i replyed, dont want to spew false info. if the tires were a true 29.5, and you were doing a true 55mph, actuall rpm's come out to about 2900.
     
  9. mountainexplorer

    mountainexplorer 1/2 ton status

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    Thanks for calculating that for me and giving me the good news. /forums/images/graemlins/grin.gif

    I'm too tired to do any sort of math or use my brain.
     

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