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700r4 RRRRRR's

Discussion in 'Chassis / Drivetrain / Suspension / Wheels' started by Dinosport, Sep 13, 2017.

  1. Dinosport

    Dinosport Master Mechanic

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    i might've asked before but I can't find it. I'm in the middle of swapping in a 700r4 on my small block Malibu. It has 308's in it now but I have access to a set of 373's. I have a 26 inch tire so I'm curious if anybody know what kind of rpm will nine looking at doing about 70 on the highway.
    Thanks in advance
     
  2. DRIVEN

    DRIVEN Comic Book Super Hero

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  3. Dinosport

    Dinosport Master Mechanic

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    Oh yes I forgot about those calcuators, Thanks. So it looks like Id be at roughly 23-2400 at 70. I can live with that. Ill bet it will be fun off the line too with those gears.
     
  4. DRIVEN

    DRIVEN Comic Book Super Hero

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    Its a good compromise. I went from TH200/2.29s to 200-4R/3.42 and had the same freeway cruise RPM with waaay better take off. Felt like a whole different car.
     
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  5. Dinosport

    Dinosport Master Mechanic

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    Next thing Ill have to do once the 373's are in is see where speedo reads and find the gear for it to read right or close enough, Thanks
     
  6. 84cutspreme

    84cutspreme G-Body Guru

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    hey just my opinion but i hate the 3.73:1 with my 700. 1st gear is just funky. I actually want to step down. take a look at this article: http://700r4.com/faq/ratiocmp.shtml
     
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  7. DRIVEN

    DRIVEN Comic Book Super Hero

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    Valid point. The golden rule is 10:1 compound gearing. For a 700R4 a 3.23 would be ideal. Come to think of it, my brother's car has 3.73s behind a 4L60E and it does seem a bit short legged in first. He has pretty short tires too though.
     
  8. Dinosport

    Dinosport Master Mechanic

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    Well I was originally looking for 342's but I know somebody that has 373's and wants to trade for my 308's. He'll even do the job for free.
    They need the 308's for circle track.
     
  9. Dinosport

    Dinosport Master Mechanic

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    So basically what where saying here is that the car under normal driving conditions going to roll off the light and shift pretty quick because of the 373's. probably not making it even through the intersection before it shifts into second
     
  10. Kwik_Cutty88

    Kwik_Cutty88 Moderator
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    I have a 700R4 in my car. 28" tire, 3.73's. At around 60-65 mph with the converter locked, cruising RPM's are around 2100-2200. I've been very happy with it. At the track the spread from 1st to 2nd is manageable, I run on 26" tires at the track.

     
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