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5.13's with 35's??

Discussion in 'The Garage' started by 85mudblazin, Dec 23, 2004.

  1. 85mudblazin

    85mudblazin 1/2 ton status

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    Will I be over stressing anything with 5.13's??
    Will I be able to cruise at 70 mph??
    Anyone have experience with 5.13's and 35's??
    Thanks alot
    -Chris
     
  2. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    Theoretically with a th350/th400 it would be 3201 rpm @ 65 mph . Your th700r4 will be a bit lower , but not too much :xmas:
     
  3. u2slow

    u2slow 1/2 ton status

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    http://www.4lo.com

    I get ~2500 rpm assuming .73 OD.
    I get ~3500 rpm assuming 1:1.

    Sounds good so long as you have OD.
     
  4. Emmettology 101

    Emmettology 101 3/4 ton status

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    My opinion is it would be too low. I have 35's and 4.56's with a 700r4 and it in OD, 4.88's would've be about right or close to pushin it. I think 5.13's would be too much.
     
  5. Greg72

    Greg72 "Might As Well..." Staff Member Super Moderator

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    It may not have "legs" on the highway, but around town it will sure get up and BOOGIE!!!! :xmas:
     
  6. 85mudblazin

    85mudblazin 1/2 ton status

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    yea I figured it would be a fun ride around town but I was hoping it would be ok on the highway:confused:
     
  7. ratzila

    ratzila 1/2 ton status

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    Nvrenuf had that setup in his dd crewcab & went back to 4.56's.
     
  8. 85mudblazin

    85mudblazin 1/2 ton status

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    hmmmm I am starting to think 4.56's would be better plus they are stronger than the 5.13's:thinking:
     
  9. TWISTEDJACK

    TWISTEDJACK 1/2 ton status GMOTM Winner

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    Keep in mind that the tires won't measure out to 35" so that throw the calculations off.
     
  10. ratzila

    ratzila 1/2 ton status

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    I ran 4.88's with 35sx on my 91 blazer. This was with the 700r4,so overdrive felt like 3rd gear. 4.56's would be a good compromise :thumb:
     
  11. surpip

    surpip 1 ton status

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    thats what i have right now and its terrible on the freeway, but ya around town it scoots, but i pretty much need to keep it in od on any kind of straight away, really winds out the motor, but soon ill be steppin to 40's so it should be fine:xmas:
     
  12. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    Yeah, I ran them for a couple of months but in the end didn't like them - more specifically I didn't like the tranny behavior. I did NOT have any problem with the rpm's on the highway, my complaint was more around town. With the motor spinning faster it always felt like it was in the wrong gear, it was sluggish because it was usually in 3rd quickly and difficult to get it to downshift and STAY there. If I could get it to down shift I had to push hard and then it usually upshifted again right away.

    Something to note is that my motor is a tired stock 350, if I had something stronger that didn't run out of breath around 3500rpm the 5.13's would probably still be in the truck.

    I really think the 5.13 / 35" combo is a good match. I was too lazy to research mod'ing the tranny to accomodate the gears, it was simply easier to put 4.56's in it. A plus for the 4.56's is that my speedo seems to be accurate within about 3~4 mph where it was off by +10 mph with the 5.13's. I could have modified the DRAC to correct the speedo but again the lazy factor kicked in. :surepal: :doah: :whistle:
     
  13. tarussell

    tarussell 1/2 ton status

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    It looks like your running a TH700R4 so I would think the highway RPM's will be liveable .

    I had a Dually with 4.56's and a 32" tall tire ( just for comparison ) and it absolutely scooted around town !!! On the highway it sucked due to the 1 to 1 high gear though.

    I thought NVRENUF's ( John ) truck felt good with the 5.13's and 35's but it did suck that the tranny up-geared as soon as it could - I wish he would have fixed the electronics to work with the 5.13's . The 4.56's in his truck now are a good compramise but I wish it had more gear .

    Tom
     
  14. big94gmc

    big94gmc 1/2 ton status

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    ...... Yea, what they said.

    :D

    I just think 5.13's are too tall for the street with 35" tires (44's, maybe, but not 35's), regardless of if you have an OD transmission or not. 4.56's would be my bet for best compromise 'tween street during the week, and trail on the weekend. But then again, if it's that important to ya to have low 5.13's for the weekend and still cruise at speed during the week, get yourself a GearVendors Under/Overdrive and smack that thing on.:cool:


    (PS, looking forward to ridin' biatch in the Sub on the first, David - now all ya'll head over to LIU and answer my Updated thread!:cool1: :cool1: )
     
  15. nvrenuf

    nvrenuf NONE shall pass! Premium Member

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    5.13 + 44's would be good for street driving but for wheeling more is definitely better. When I ran that set up it was ok but there were still times when more gear would have been nicer, 44's are h-e-a-v-y.
     
  16. jekquistk5

    jekquistk5 Weld nekid Premium Member GMOTM Winner

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    Im deciding between 4.56 or 4.88 buts looks like 4.56 is the better option. Untill i can get a tow rig, 4.56 it is!
     
  17. Hossbaby50

    Hossbaby50 3/4 ton status

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    What axles are the gears going in? If you don't have a D60 front I don't think I would run 5.13's in a 1/2 ton front. Pinion is to small and the gear contact is to low.

    With an OD tranny 5.13's on the street could be ok if you don't do alot of highway for long distance. I have 4.56's with 35" tires with a 700R4 and I wish I had 4.88's.

    4.88's are probably the best gear to run with and OD tranny and 35's unless you have a damn healthy motor.. I got a decent amount of power and wish I had a little more gear.

    Harley
     
  18. Ryan B.

    Ryan B. 3/4 ton status GMOTM Winner

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    good call..

    I have 4.56's and 35" tires on my daily driver.. cruising a little over 55 its around 3,000 rpms.. 75mph is 3500. I wouldn't go much lower without an OD tranny unless you like to only go 55 or 60 on the freeway.
     
  19. reeser

    reeser 1/2 ton status

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    swap in the 5.13 and then get bigger tires in the next couple months, that's what i would do. that way you're only swapping gears once and you save $ in the long run.
     
  20. 85mudblazin

    85mudblazin 1/2 ton status

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    Only if it was that easy, I want to wait till I get a D60 to get bigger tires.
    I am thinking either 4.56's or 4.88's. I have the OD tranny but I think the 5.13's will just be to much with the 35's.
    Yea the gears are going to go in a 14bff rear and a 10b front for know, that is another reason why I would like to stay away from the 5.13's because of strength issues.
     

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