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GEARS POLL

Discussion in 'The Garage' started by MilpitasK5, Dec 11, 2002.

  1. MilpitasK5

    MilpitasK5 1/2 ton status

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    <FORM METHOD=POST ACTION="http://coloradok5.com/forums/dopoll.php"><INPUT TYPE=HIDDEN NAME="pollname" VALUE="1039662763MilpitasK5">


    What gears do you run with 35 inch tires, NP208, 700R4?
    <input type="radio" name="option" value="1" />4:10
    <input type="radio" name="option" value="2" />4:56
    <input type="radio" name="option" value="3" />3:73
    <input type="radio" name="option" value="4" />4:88
    <INPUT TYPE=Submit NAME=Submit VALUE="Submit vote" class="buttons"></form>
    Please reply with any feed back that you have or just let take the poll.
    I'm planning on going 3/4 ton and want to plan it right! /forums/images/graemlins/ears.gif /forums/images/graemlins/ears.gif
    Thanks,
     
  2. zcarczar

    zcarczar 1/2 ton status

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    I would run 4.56, but 4.10's might get you better freeway mileage but less towing power and power around town.
     
  3. MilpitasK5

    MilpitasK5 1/2 ton status

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    Great!! /forums/images/graemlins/thumb.gif That's the feed back I'd like to hear as I will be using my truck for long road trips and occationally be towing a ski boat. I still want to have a good crawl ratio though.
     
  4. Seventy4Blazer

    Seventy4Blazer 3/4 ton status

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    ill have you know my vote for 4.56 is not a true vote, as i dont have 35's nor do i have any thing but an empty housing under my truck.
    BUT if i was to run 35's i would run 4.56. no matter what trans i was to run. cus im like that.
    Grant
     
  5. rockink5

    rockink5 1/2 ton status

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    4.56 will be perfect for 35's. /forums/images/graemlins/thumb.gif But if you ever plan on going bigger than 35's you might want the 4.88's. /forums/images/graemlins/eek.gif I voted 4.56
     
  6. Highlander

    Highlander 1/2 ton status

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    I run that set up or did I now have a 205 but anyway on the Highway at 75 the RPM is like 2300 or 2400 I think
    I don't mind it at all. But for a year or two I thought I had 4.11's in it

    Eric
     
  7. HarryH3

    HarryH3 1 ton status Author

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    I've got 35's and 4:10's on my K5 with a Turbo 400, but I'm planning on installing 4.56's with the 35's and 700R4 on my Suburban. /forums/images/graemlins/thumb.gif
     
  8. zakk

    zakk 1/2 ton status

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    ok, here we go:

    Chris runs a 700R/208 combo. this means he has a 3.0 first gear and when in 4Lo he has a 2.62 reduction. Conversly, he has .70 final drive while in OD

    So if he has 4.10's with the afore mentioned combo, he has a RPM (@ 70 MPH) would be 1929 RPM

    If Chris ran a 4.56 Combo, at 70 MPH he would be running at 2145 RPM

    That difference is only 216 RPM, not a big difference, IMHO.

    If Chris were to go to 4.88 gears, this would be much better to get the RPM's in a decent street performance range. With 4.88 his RPM's at 70 would be 2296

    Now, assuming the constant 700R/208 Combo the crawl rations would be the following:
    4.10 = 64:1
    4.56 = 71:1
    4.88 = 76:1

    So if he decides to go with the 4.88's he can achieve maximum off road perfromance (crawl ratio) while still letting the engine spin a bit.

    Chirs, Greg and I caravaned down to pismo together. I was spinning around 2800 RPM's at 70-75, so that is how i arrived at the arbitrary 70 mph benchmark figure. All trucks that are steetable should be able to run at that speed.

    With the OD engaged, i would say 4.88's, but i voted for 4.10's before tackling the issue at hand.

    Cheers.
     
  9. wayne

    wayne 3/4 ton status

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    I ran 35's with 4:56's and a 700r4 and it worked great. With 4:10's don't expect to use overdrive alot. Heck with the 56's I only used it on the highway.
     
  10. balzackks84

    balzackks84 1/2 ton status GMOTM Winner

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    Hmmmm..... what if i told you i was still running 3.08's? Lets just say i dont recomend it. /forums/images/graemlins/deal.gif
     
  11. SAVAGE1

    SAVAGE1 1/2 ton status

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    I say 4.88's cause I know you'll be going to at least a 36" or 37" tire within a year of the swap. You gotta plan for the future /forums/images/graemlins/thumb.gif In my opinion, 700R4 is only good if you use all the gears, with 4.88's you WILL use them all. Plus it'll give you more get up and go when towing and gettin up the mountain inclines. But what do I know, I ran 42's with 4.10s /forums/images/graemlins/ignore.gif
     
  12. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    4.88's...zakk spelled it out perfectly. The only advantage I can see to 4.56's is a lot of the one ton sets come with em saving you the gear swap expense. If you're gonna have to swap ratio's anyways 4.88's for sure.

    Rene
     
  13. MudbogAD

    MudbogAD 1/2 ton status

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    I ran 4.56's and 35's for awhile and it was nice, but now the new 39.5's need 5.13's /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif
     
  14. K05Aggie

    K05Aggie 1/2 ton status

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    C'mon, somebody vote for 3.73's!
     
  15. zakk

    zakk 1/2 ton status

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    i agree Rene. 4.56's would still be a very good choice if you got them as part of your swap deal. One thing, how commen or 4.56 3/4 ton set ups?

    If he had to regear all of it, 4.88's. I also do not think 4.10's would work at all anymore, after thinking about it.
     
  16. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    4.56 3/4 ton set-ups aren't common at all from what I've seen...so if a re-gear has to be done I'd go 4.88's for sure.

    Rene
     
  17. MilpitasK5

    MilpitasK5 1/2 ton status

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    Well it looks like it slowly became advice to with 4:88s. Sounds rational but I have found some opportinities with a 3/4 ton rear with 4:56s in it already. Maybe I can go that route until I need can afford to go with 4:88s.
    Or since my junk is running fine right now, I may be able to just collect the parts and be patient. Regear with what ever I end up with. hmmmm /forums/images/graemlins/confused.gif
     
  18. Blazinaire

    Blazinaire 1/2 ton status

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    I have been running tbi350/ 700r4/ np208/ 4.56/ w/35''s for almost a year now and am very happy with the results. If gas mileage is an issue, I wouldn't worry about going with 4.56's, I averaged 18.4 MPG over my last 3000 miles of driving /forums/images/graemlins/laugh.gif /forums/images/graemlins/thumb.gif!! I initially thought that the highway rpm's were too high, but then I realized that I was coming from 3.42's before. I plan on going up to 37''s soon and I think that the 4.56's will still pull them with no problems. With anything larger than 35''s, 4.88's would be a good choice, but IIRC you are running 10 bolts F&amp;R and the pinion gets pretty small even at 4.56 /forums/images/graemlins/blush.gif, on my 12 bolt the pinion still has some meat to it, but with the front 10 bolt 4.56 was the lowest that I would feel comfortable running due to the size of the pinion.
     
  19. MilpitasK5

    MilpitasK5 1/2 ton status

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    That sounds like a good set up so far.

    I don't plan on running those gears in my 10bolts. I'm gonna be getting either a 14bolt FF or D60 rear and a D44 in the front.
    Thanks for the input... /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif /forums/images/graemlins/ears.gif
     
  20. VisionxOrb

    VisionxOrb 1/2 ton status

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    Using a transmission calculator this is what I got. now these numbers are if your torque convert actually locks up in OD with a 35 inch and 4.88s ( what i run ) at 65 mph in 1:1 would get 3,046 and in od 2,132 and at 85 3,984 at 1:1 and 2,789 in od.
     

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