Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

what gears is everyone running I'm trying to decide?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by slider79blazer, Sep 25, 2001.

  1. slider79blazer

    slider79blazer 1/2 ton status

    Joined:
    Mar 23, 2001
    Posts:
    164
    Likes Received:
    0
    Location:
    littleton,co.
    what gears is everyone running I\'m trying to decide?

    I have a 79 w/400C.I. 350 turbo auto. w/ 3:73 gears 35-12.50-15 mudders. I'm trying to decide if I want 4:11 or 4:56 gears. it is my daily driver so I want it somewhat good on the roads but I want it to hold me back on the trails also. right now the 3:73s don't slow me down at all I have to ride the brakes down the trail. let me know what you all run and are you happy with your choice?

    Thanks

    <font color=blue>whats a 4 letter word for farm wagon?-- ford</font color=blue> [​IMG]

    <a target="_blank" href=http://community.webshots.com/user/slider79blazer>http://community.webshots.com/user/slider79blazer</a>
     
  2. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

    Joined:
    Dec 2, 2000
    Posts:
    5,855
    Likes Received:
    0
    Location:
    Hollister, CA
    Re: what gears is everyone running I\'m trying to decide?

    I have the 700r4 with 33 inch tires and run 4.56.. It is not my daily driver thou.. And I have the overdrive.. Dan

    If it ain't broke.......Don't fix it....
    <a target="_blank" href=http://coloradok5.com/gallery/Gokartergo>KLICK</a>
     
  3. dragricinMT

    dragricinMT 1/2 ton status

    Joined:
    Jul 21, 2001
    Posts:
    135
    Likes Received:
    0
    Location:
    Billings Montana
    Re: what gears is everyone running I\'m trying to decide?

    I'm running 3.73's with 35's. Not bad but I was running 31's with these gears before. I'm going to 4.11's next summer. Going to a 400cid from the 350cid helped but still miss that extra torque.

    78-K5 4"Lift 35"Tires 400SB TH350 NP205
    73 Vega 350SB TH350
     
  4. slider79blazer

    slider79blazer 1/2 ton status

    Joined:
    Mar 23, 2001
    Posts:
    164
    Likes Received:
    0
    Location:
    littleton,co.
    Re: what gears is everyone running I\'m trying to decide?

    I went from 33s to 35s runs great on the road and climbs uphill good but coming down I want to crawl but the gears are just to hi I'm thinking on the 4:11s also.

    <font color=blue>whats a 4 letter word for farm wagon?-- ford</font color=blue> [​IMG]

    <a target="_blank" href=http://community.webshots.com/user/slider79blazer>http://community.webshots.com/user/slider79blazer</a>
     
  5. solowookie

    solowookie 1/2 ton status

    Joined:
    Mar 31, 2001
    Posts:
    3,880
    Likes Received:
    0
    Location:
    Wyoming
    Re: what gears is everyone running I\'m trying to decide?

    with no OD I wouldn't got over 4.10's... I got 35's with 4.10s and at 75 I'm running about 2900 RPM...

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>link to k5's</a>
     
  6. Pugsley

    Pugsley 1/2 ton status

    Joined:
    Jan 16, 2001
    Posts:
    3,556
    Likes Received:
    0
    Location:
    Tucson, Arizona
    Re: what gears is everyone running I\'m trying to decide?

    I'm running 3.73's currently, and plan to go with 4.11's when I get my new axles in.

    Special thanks to those lost from IAFF Locals 94 and 854 - You shall never be forgotten
    <a target="_blank" href=http://pugsley.alloffroad.com>pugsley.alloffroad.com</a>
     
  7. DesertDueler

    DesertDueler 1/2 ton status

    Joined:
    May 23, 2001
    Posts:
    3,106
    Likes Received:
    0
    Location:
    Phoenix, AZ
    Re: what gears is everyone running I\'m trying to decide?

    I am putting 4.56s in the Jimmy as we speak. It has 350, 700r4 and 35" Goodyear MTRs. I will be putting 4.10 in the burb shortly. It has 350, 700r4, and 35" BFG MT

    86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  8. slider79blazer

    slider79blazer 1/2 ton status

    Joined:
    Mar 23, 2001
    Posts:
    164
    Likes Received:
    0
    Location:
    littleton,co.
    Re: what gears is everyone running I\'m trying to decide?

    if I put 4:10s in will that slow me down on trails or will the tranny still pull me down fast?

    <font color=blue>whats a 4 letter word for farm wagon?-- ford</font color=blue> [​IMG]

    <a target="_blank" href=http://community.webshots.com/user/slider79blazer>http://community.webshots.com/user/slider79blazer</a>
     
  9. arq

    arq 1/2 ton status

    Joined:
    Jan 17, 2001
    Posts:
    2,017
    Likes Received:
    0
    Location:
    Imperial Valley/Maricopa
    Re: what gears is everyone running I\'m trying to decide?

    I am also debating about what gears to use. I'll probably go with 3.73s, 35s, with a sm465 tranny.

    ARQ.

    offroad baja!!!
    1-72 4x4 CST Blazer
    2-71 4x4 CST Blazer
    <a target="_blank" href=http://coloradok5.com/gallery/ArqDennis>http://coloradok5.com/gallery/ArqDennis</a>
     
  10. white_knight

    white_knight 1/2 ton status

    Joined:
    Feb 23, 2001
    Posts:
    1,171
    Likes Received:
    0
    Location:
    Calgary, Alberta,Canada
    Re: what gears is everyone running I\'m trying to decide?

    410's with 44's and an sm465

    <a target="_blank" href=http://www.whiteknight.scriptmania.com/>http://www.whiteknight.scriptma
    nia.com
    </a>
     
  11. MudFrog

    MudFrog 1/2 ton status

    Joined:
    Feb 23, 2000
    Posts:
    3,236
    Likes Received:
    0
    Location:
    Daleville, Va
    Re: what gears is everyone running I\'m trying to decide?

    I've got 33's with 4.10's and the 700R4

    89 K5 Silverado
    <a target="_blank" href=http://mudfrog.rockcrawler.com>http://mudfrog.rockcrawler.com</a>
     
  12. steve85fla

    steve85fla Registered Member

    Joined:
    Mar 27, 2001
    Posts:
    83
    Likes Received:
    0
    Location:
    palm beach county FL
    Re: what gears is everyone running I\'m trying to decide?

    I'm running 4:56 with 35" tires and a 700r4
    my opinion 3:73 to 4:11 is not going to make a big difference for you, you might want to consider 4:56-you can always go up in tire size
     
  13. Highlander

    Highlander 1/2 ton status

    Joined:
    Nov 25, 2000
    Posts:
    1,204
    Likes Received:
    0
    Location:
    Lakewood Colo
    Re: what gears is everyone running I\'m trying to decide?

    I've got 4:10 with 35 BFG AT's It works alright off road as for the down hill stuff If I'm in 1st gear and Lo-4 It does great.
    Eric

    <a target="_blank" href=http://cethern.tripod.com/erics-home-page-and-other-stuff/>http://cethern.tripod.com/erics-home-page-and-other-stuff/</a>
    AMSOIL Dealer # 529948
    Cethern@interfold.com
     
  14. slider79blazer

    slider79blazer 1/2 ton status

    Joined:
    Mar 23, 2001
    Posts:
    164
    Likes Received:
    0
    Location:
    littleton,co.
    Re: what gears is everyone running I\'m trying to decide?

    eric do you have a automatic or standard?

    <font color=blue>whats a 4 letter word for farm wagon?-- ford</font color=blue> [​IMG]

    <a target="_blank" href=http://community.webshots.com/user/slider79blazer>http://community.webshots.com/user/slider79blazer</a>
     
  15. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

    Joined:
    Feb 17, 2000
    Posts:
    7,385
    Likes Received:
    0
    Location:
    Atlanta
    Re: what gears is everyone running I\'m trying to decide?

    If you had the 465 I would say the 465's since you will not have the slip. I just put 4.10 in mine with tall 32's. Should be ok with the 35's I'm tunning 3000 rpm at about 65-70 (speedo is off). BigJBear is running 4.65's with 35's and loves them on the trail but for running down the hwy it is turrning some RPM's. He has a 80 with lock up converter so it's not quite as bad as a 79 would be with no lock up. If you do a lot of hwy I would say go with the 4.10's I('m debating 33's or 35's right now.

    I don't need no damn shop manual, I got a pornographic memory.
    <a target="_blank" href=http://communities.msn.com/OffroadK5s>communities.msn.com/OffroadK5s</a>
    75 Jimmy, Dollar
    Grim-Reaper
     
  16. BurbinOR

    BurbinOR 3/4 ton status

    Joined:
    Feb 17, 2000
    Posts:
    5,829
    Likes Received:
    0
    Location:
    Oregon
  17. Sparky87k5

    Sparky87k5 1/2 ton status

    Joined:
    May 6, 2001
    Posts:
    726
    Likes Received:
    0
    Location:
    Lynden, Washington, 4 miles from Canada
    Re: what gears is everyone running I\'m trying to decide?

    4.56's, NV4500 &amp; 33" tires. 65mph = 2200RPM in 5th and 2900RPM in 4th.

    A good firm grip is my idea of gun control!
     
  18. solowookie

    solowookie 1/2 ton status

    Joined:
    Mar 31, 2001
    Posts:
    3,880
    Likes Received:
    0
    Location:
    Wyoming
    Re: what gears is everyone running I\'m trying to decide?

    you know what I haven't done much rock crawling, but I have done a LOT of hill climbing with this thing. I can tell ya what I have absolutely no desire to have a lower geared axles.

    now, in my k5 that has a 700r4 I'm running a 31" tire with 4.10's and I absolutely love the combination. I have OD there though.

    the sm465 has really low gearing... and I also have the np241 which also has really low gearing. now if you got an np205 I would say you gotta drive the thing a bit off-road before you decide.

    my k5 is not a dedicated trail rig because I use it for a lot of daily driving also. I'm not willing to make this thing so trail ready that I don't like the way it drives on the road.

    if it were me a touch higher gearing in the t-case would not pose a problem... when I put this thing in low / low it really creaps. I like the combination I got right now.

    another thing you gotta consider is if you 35" tires are really 35"... unless you are running an interco tire chances are you really don't have a 35" tire. my 35" tires measure exactly 33" so I'll be going to an interco 36" tire when these are run out. I probably will not change the gear ratio either, but we'll see. depends on how well the new engine will turn those tires.

    <font color=blue> Jeff - may the force be with you</font color=blue>
    <a target="_blank" href=http://coloradok5.com/gallery/Jeffs-Stuff>link to k5's</a>
     
  19. michaelm

    michaelm 1/2 ton status

    Joined:
    Feb 2, 2001
    Posts:
    872
    Likes Received:
    0
    Re: what gears is everyone running I\'m trying to decide?

    leave your gears alone so you can fly on the freeway and add a doubler to crawl off road.
    the absolute best combination. wish it had been available when i did my drivetrain the first time and i wouldnt be saddled with 4.88 and 39" tires cruise rpm on the freeway about 2600 rpm 55mph
     
  20. '73 K5

    '73 K5 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    1,763
    Likes Received:
    0
    Location:
    Kansas
    Re: what gears is everyone running I\'m trying to decide?

    4.10's and 33's. I couldn't be happier. I used to have a Jeep with 35's and 4.56's and it was a great combo too. Could still cruise OK on the highway with no overdrive. Get the 4.56's or you'll end up kicking yourself later.

    '73 K5
    Chevy good...Ford bad
     

Share This Page