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which gear?????

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by shruper, Apr 20, 2000.

  1. shruper

    shruper Newbie

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    Location:
    forest grove,oregon
    4.10's or 4.56?? i have a 700R4, tow a big boat, want the slow crawl and do not want to rev out my daily driver. suggestions?????

    n/a
     
  2. jmpd

    jmpd 1/2 ton status

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    What tire size, motor, trans Etc???
    How big is the boat?
    We need more info
     
  3. shruper

    shruper Newbie

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    forest grove,oregon
    4.10 or 4.56 or whatever??? 86 blazer, stock 350, 700R4 tranny, stock transfer case, 35 in tires and i tow a 4000 lbs. boat w/ trailer. i want the slow crawl, but do not want to rev out my daily driver .

    suggestions??????

    thanks

    n/a
     
  4. 88Jimmy

    88Jimmy 1/2 ton status

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    Location:
    Las vegas, NV
    4.56 gears will work I tow a 6000lbs travel trailer with
    4.56 35" BFG a/t and when I travel its 1000 to 1500 miles at a time. Fact my next trip will be to Seattle in two weeks.

    350 Vortec TPI D60 14Bolt 4"lift 35 BFG A/T
     
  5. '73 K5

    '73 K5 1/2 ton status

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    DUDE. You could get 4.56's WITHOUT an overdrive and your highway RPM wouldn't be that bad with 35's. But since you have an overdrive you should completely get the 4.56's...don't even think about 4.10's. You could even do some 4.88's and still cruise comfortably at 75 mph.

    '73 K5
    Chevy good...Ford bad
     
  6. Udy

    Udy Registered Member

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    Location:
    fairport NY
    Don't make the mistake I made. I had 4.10 installed with 35s and the 700R4. I was worried about highway RPM. Anyway, They were OK until a slight wind or hill. Then I'd have to downshift to drive. Ironically enough, I am having 4.56s installed tomarrow! I am taking a 6 hour trip next weekend through the hills of Pensylvania (Carlisle bound!). I'll surely let you know how it went. I hope I dont wish I had installed 4.88s!
     
  7. getsome

    getsome 1/2 ton status

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    Location:
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    Go with the 4.56. I have the same setup as you but with the 4.10 and it's a dog! I wish like hell that the guy that I bought it from had put the 4.56 in.

    Getsome
     

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