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4.56 Gears

Discussion in 'The Garage' started by csnutrition, Sep 30, 2004.

  1. csnutrition

    csnutrition Registered Member

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    Location:
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    Question? Just installed 4.56 gears on Blazer with 35's, 350ci engine, turbo 350 tranny, NP203 case. The truck seems to feel like it wants another tranny gear at about 40-50mph. Does anyone know appox RPM's at 50-60mph and is it safe to drive at that speed, i.e.stress engine, for 70-80 mile trip?
     
  2. big pappa b

    big pappa b 3/4 ton status

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    HERE is a chart. Shows about 2800 or so with what you have
     
  3. smokkey1

    smokkey1 1/2 ton status

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    Los Angeles, CA

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