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.

Are 3:73s enouph for 35s? What will I be reving at on the freeway?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by RyansRod, Oct 5, 2002.

  1. RyansRod

    RyansRod 1/2 ton status

    Joined:
    Jun 13, 2001
    Posts:
    118
    Likes Received:
    0
    Location:
    Bay area CA. USA
    Anyone have this combo. I have a 4L60E, an NP241 case and 3:73s in the rear end.
     
  2. mudhog

    mudhog THEGAME Staff Member Super Moderator

    Joined:
    Nov 6, 2000
    Posts:
    17,899
    Likes Received:
    2
    Location:
    portland oregon
    </font><blockquote><font class="small">In reply to:</font><hr />
    3:73s in the rear end

    [/ QUOTE ] what about the front end /forums/images/graemlins/shocked.gif yes you should do ok my bet is you will wish you had 4:10's but you will have good rpms on the highway /forums/images/graemlins/smile.gif
     
  3. RyansRod

    RyansRod 1/2 ton status

    Joined:
    Jun 13, 2001
    Posts:
    118
    Likes Received:
    0
    Location:
    Bay area CA. USA
    Will it be OK to go into overdrive though? All I'm concearned with is puting as little stress on the transmssion as possible while getting good mileage.
     
  4. mudhog

    mudhog THEGAME Staff Member Super Moderator

    Joined:
    Nov 6, 2000
    Posts:
    17,899
    Likes Received:
    2
    Location:
    portland oregon
    yes it will be ok i wouldnt put it in overdrive when climbing big long hills but just going straight on the freeway yes it will be fine /forums/images/graemlins/smile.gif
     
  5. imiceman44

    imiceman44 1 ton status

    Joined:
    Aug 5, 2002
    Posts:
    15,160
    Likes Received:
    1
    Location:
    Sacramento, CA
    I have 3.54 with 35" and on the highway I am fine although sometimes I downshift manually on steep grades. On the trail, I have to use the throttle more than I like to sometimes but I think I might change to 4.10 or 4.56 when i know that I will be doing more trail and less highway.
    IceMan
     
  6. Z3PR

    Z3PR Banned

    Joined:
    Mar 30, 2002
    Posts:
    19,217
    Likes Received:
    0
    Location:
    Everywhere
    How about the 373's with 36" tires and a TH350/NP-203 combo ???? Will see more highway use then anything else till I get a Dana 60. Then gears will be changed to 4:88
     
  7. wayne

    wayne 3/4 ton status

    Joined:
    Feb 1, 2001
    Posts:
    6,178
    Likes Received:
    0
    Location:
    Carlisle, Pa
    You will get better milage if you do a gear swap. I went from 3:42's and 31's to 4:56 and 35's and was getting better milage. The engine didn't seem to work near as hard as it did when it was stock. I noticed a big gain especially driving in stop and go traffic.
     
  8. Mreetz

    Mreetz 1/2 ton status

    Joined:
    Jun 26, 2001
    Posts:
    1,282
    Likes Received:
    0
    Location:
    Subs of Denver, Colorado
    I had 3:73s and it was fine. I love my 4.11s now tho!!! /forums/images/graemlins/rotfl.gif
     
  9. outlaw612

    outlaw612 1/2 ton status

    Joined:
    Feb 11, 2001
    Posts:
    2,342
    Likes Received:
    0
    Location:
    Springfield, Illinois
    Im running 3.37's and 35's with a 700r4. It drives good for the most part. I have run into some pretty strong headwinds and had to run in D instead od OD. I dont think there is enough power but it doesnt do real bad. Im going to 4.56's and 36's. /forums/images/graemlins/thumb.gif
     
  10. Great78burb

    Great78burb Registered Member

    Joined:
    Sep 24, 2002
    Posts:
    28
    Likes Received:
    0
    Location:
    San Diego, CA
    I have 3.08's and 35's because the previous owner never re-geared. Luckily the motor was rebuilt very well and has plenty of torque. I can still do freeway speeds even uphill without much problem, but I have to use more throttle than I would like when offroad. I am looking forward to upgrading to 3/4 ton axles with 4.10's as soon as I can afford it! /forums/images/graemlins/burb.gif
    Chris
     
  11. efilnikufecin

    efilnikufecin 1/2 ton status

    Joined:
    Feb 27, 2002
    Posts:
    168
    Likes Received:
    0
    Location:
    flint,mi
    i ran 3.73 and 35 in my 91 for about 3 weeks.it was horrible on the e-way the converter would never lock-up unless your going down a hill.i was running 1800rpms at 80 mph.i got 4.56's now and run about 2600 at 80mph now.i think you can damn near run 4.88's and the rpms will still be reasonable at highway speeds.
     

Share This Page