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What gears for 38's?

Discussion in 'The Garage' started by 84gmcjimmy, Feb 27, 2004.

  1. 84gmcjimmy

    84gmcjimmy 1 ton status

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    What gears for 38\'s?

    Hey, I was wondering what gears I should run with 38's? It's a DD. Thanks
     
  2. Tweetysuarus

    Tweetysuarus 1/2 ton status

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    Re: What gears for 38\'s?

    At least 4:56.JMO! But I wished I had gone with 4:88's or 5:13's.........HHHhhhhhmmmmmmm...........
    Bill
     
  3. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

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    Re: What gears for 38\'s?

    Depends on what motor/tranny combo you have but in most cases 5.13's would be the best. /forums/images/graemlins/thinking.gif
     
  4. TruckNutzDude

    TruckNutzDude 1/2 ton status

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    Re: What gears for 38\'s?

    5.13's if you have an overdrive transmission... 4.88's or 4.56 if you don't. If it was me I'd use 5.13's either way /forums/images/graemlins/waytogo.gif
     
  5. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Re: What gears for 38\'s?

    I've got 4.10s and no complaints. 4.56 would probably be ideal for MPG with 4.88 or 5.13 being the choices for a rig that sees quite a bit of off road use.

    I personally am going all the way to 5.13 if I ever change. Not worth it otherwise if you ask me.
     
  6. GMC

    GMC 1/2 ton status

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    Re: What gears for 38\'s?

    I've got 4.88's with 38's and it's pretty good on the street, but pushing it if you drive very far on the freeway.
     
  7. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    Re: What gears for 38\'s?

    I put 4.56s in my buddies truck with 38s. He has a 350 and 4L60E. We should have gone lower. That being said.

    4.88 /forums/images/graemlins/thumb.gif
     
  8. jakeslim

    jakeslim 1/2 ton status

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    Re: What gears for 38\'s?

    i have 4.10's for my 38's. I am at around 2500rpms at 60mph. Well, that may be off some since I'm using my stock tach to gauge.

    I went with 4.10's since my d60 already had them and I regeared the 14bolt by myself up to 4.10 /forums/images/graemlins/woot.gif
     
  9. Ryan B.

    Ryan B. 3/4 ton status GMOTM Winner

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    Re: What gears for 38\'s?

    38's, no overdrive..
    For daily driving, 4.56
    For a wheeling rig, 5.13
     
  10. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    Re: What gears for 38\'s?

    With my 38s and 4.10s I spin at 1800RPM at 70 MPH, in overdrive.
     
  11. Ryan B.

    Ryan B. 3/4 ton status GMOTM Winner

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    Re: What gears for 38\'s?

    /forums/images/graemlins/frown.gif I don't want to hear you brag about how awsome that NV4500 is. /forums/images/graemlins/thinking.gif /forums/images/graemlins/whistling.gif /forums/images/graemlins/rotfl.gif
     
  12. rockinr4x4

    rockinr4x4 Newbie

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    Re: What gears for 38\'s?

    I'm running 38's with 5.13's and a 700r4, turning about 2600 in overdrive at 70. In my opinion its just about perfect for everyday driving in town, and on the highway.
     
  13. chvyhs

    chvyhs 1/2 ton status

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    Re: What gears for 38\'s?

    I've been running 3.73's with my 38's for about a year now. It's great on the freeway but a little sluggish off of the line, but what more can you expect with a '90 Suburban. Out on the trail I almost always had to go directly to 4low. So I've bought 4.88's to and a doubler to handle things better. Give me another couple of weeks and I'll tell you how things worked out.
     
  14. K5MONSTERCHEV

    K5MONSTERCHEV 1/2 ton status

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    Re: What gears for 38\'s?

    [ QUOTE ]
    /forums/images/graemlins/frown.gif I don't want to hear you brag about how awsome that NV4500 is. /forums/images/graemlins/thinking.gif /forums/images/graemlins/whistling.gif /forums/images/graemlins/rotfl.gif

    [/ QUOTE ]

    HEY, I just said in OD, nothing about my NV 4500. /forums/images/graemlins/rotfl.gif But since you said it, yeah it is AWESOME!! /forums/images/graemlins/peace.gif
     
  15. 78GMC1/2TON4x4

    78GMC1/2TON4x4 1/2 ton status

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    Re: What gears for 38\'s?

    Gear Table /forums/images/graemlins/thumb.gif
     
  16. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Re: What gears for 38\'s?

    [ QUOTE ]
    I'm running 38's with 5.13's and a 700r4, turning about 2600 in overdrive at 70. In my opinion its just about perfect for everyday driving in town, and on the highway.

    [/ QUOTE ]

    Not...gear calc says 2200 rpm at 70 in OD with 5.13's and a 700R-4 running 38's.

    Fix your tach. /forums/images/graemlins/peace.gif

    Rene
     
  17. Derf00

    Derf00 1/2 ton status

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    Re: What gears for 38\'s?

    [ QUOTE ]
    Not...gear calc says 2200 rpm at 70 in OD with 5.13's and a 700R-4 running 38's

    [/ QUOTE ]
    2200 is what ours runs at 70, of course it's a little hard to figure our where 70 is with the speedo off by a large amount. /forums/images/graemlins/thumb.gif
     
  18. rockinr4x4

    rockinr4x4 Newbie

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    Re: What gears for 38\'s?

    My tach reading should be right on since its being read off the ecm in my edelbrock efi unit. The difference could come from me not having a lockup converter.
     
  19. 84gmcjimmy

    84gmcjimmy 1 ton status

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    Re: What gears for 38\'s?

    Would 5.13's work for a daily driver? I have a 350 right now, but I'll be investing in a fo-fitty-fo once I have the funds /forums/images/graemlins/peace.gif Thanks
     
  20. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Re: What gears for 38\'s?

    Should be 2350 rpm without the convertor locked...

    Rene
     

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