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Finished the Swap.. Having Problems!

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by SAVAGE1, Sep 1, 2001.

  1. SAVAGE1

    SAVAGE1 1/2 ton status

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    I just completed my 3/4 ton swap. The rear is a 14BFF with 4.10's and the front is a D44 with 4.09's. The axles came from different trucks. My problem is when I stick it in 4-H and 4-L, I roll at idle for about 15 feet and the transfer case seems to bind up and the truck stops. This is only at idle speed but when I give it some gas I hear some tire chirping and the truck starts to bounce a little. It feels like I have totally different gear ratios in my axles. So I re-checked the numbers stamped on the ring gear: Rear is 41/10=4.10, Front is 45/11=4.09. What gives? I'm out of ideas. Please help!!

    Truck Specs: 85K5 350 700r4 np208

    Rod
    Alameda, CA
    85 K5 6"ProComp 35"Boggers... and it's still not BIG ENOUGH!!
    <a target="_blank" href=http://coloradok5.com/gallery/K5Jungle>http://coloradok5.com/gallery/K5Jungle</a>
     
  2. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>The fronts were always geared slightly lower than the rear. This was so the front tires would pull instead of getting pushed by the rear.
     
  3. SAVAGE1

    SAVAGE1 1/2 ton status

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    Yeah but is it normal for the truck to start hopping and tire chirping? And it won't cruise at idle speed. It stops after a couple feet.

    Rod
    Alameda, CA
    85 K5 6"ProComp 35"Boggers... and it's still not BIG ENOUGH!!
    <a target="_blank" href=http://coloradok5.com/gallery/K5Jungle>http://coloradok5.com/gallery/K5Jungle</a>
     
  4. Gold Rush

    Gold Rush 1/2 ton status

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    Rod,

    First double check everything again. Are U-joints together right, pinion angles not to much, T-case linkage not bent, etc. Could your t-case shifter be sticking and not putting the case all the way into 4wd? Maybe your t-case is shot? How about putting the truck on 4 jack stands and spining each tire 5-10 times to see if you hear any noises? Let me know after trying these things what you find.

    David

    <a target="_blank" href=http://www.extremeblazer.com>http://www.extremeblazer.com</a>
     
  5. SAVAGE1

    SAVAGE1 1/2 ton status

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    David, I'll check that stuff in the morning. The truck drives fine in 2wd. Right before I did the swap I blew my 10 bolt. I was flexed up pretty good and I gassed it then *BANG*. If the transfer case went bad what part should I look at. Thanks for the help.

    Rod
    Alameda, CA
    85 K5 6"ProComp 35"Boggers... and it's still not BIG ENOUGH!!
    <a target="_blank" href=http://coloradok5.com/gallery/K5Jungle>http://coloradok5.com/gallery/K5Jungle</a>
     
  6. K5RON

    K5RON 1/2 ton status

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    This might be stretching it a bit but what's the possiblity that the front is in high and the rear in low or vice/versa? Don't know if this could happen with a chain drive but it's possible with a worn set of shifter interlocks in a NP205.

    Ron
     
  7. coopertwpk

    coopertwpk 1/2 ton status

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    41/10 IS 3.73 not 4.11!!!!!!!!!!!!!!!!!!!!!!!!!!!!! your doing DAMAGE

    88k5 silverado w4"lift <font color=orange>d44 and corp14ff</font color=orange> with 4.56s
     
  8. DesertDueler

    DesertDueler 1/2 ton status

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    Last time I checked 41 divided by 10 is 4.1
    You might want to check your math or use a calc.

    86 Jimmy 4"lift 35"MTRs Other cars 69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  9. Pugsley

    Pugsley 1/2 ton status

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  10. bigblue

    bigblue 1/2 ton status

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    yeAH coopertwpk ISN'T THE SHARPEST KNIFE IN THE DRAWER ...hehe



    Surfing is Life...
     
  11. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    This may be a stupid question...are you trying out 4 HI and 4 LO on dry pavement? It sure sounds like drivetrain wind-up to me...

    The slight ratio differences and whatever inhereant differences in tire diameter and air pressure will be enough to cause strain in the drivetrain even in a straight line. And yes 10 to 15 feet would be all it takes. I can get the same results in my truck and the ratios are 3.73 front and rear...

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
     
  12. FWP

    FWP CRS

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    Kind of a sanity check, but maybe count the R&amp;P teeth in both axles to make sure what's stamped is really what's there??

    <a target="_blank" href=http://coloradok5.com/gallery/75K5>http://coloradok5.com/gallery/75K5</a>
     
  13. SAVAGE1

    SAVAGE1 1/2 ton status

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    <blockquote><font class="small">In reply to:</font><hr>

    are you trying out 4 HI and 4 LO on dry pavement? It sure sounds like drivetrain wind-up to me

    <hr></blockquote>
    Rene, It was on dry pavement. So you think its normal? I'll check everything else mentioned.
    Thanks guys.

    Rod
    Alameda, CA
    85 K5 6"ProComp 35"Boggers... and it's still not BIG ENOUGH!!
    <a target="_blank" href=http://coloradok5.com/gallery/K5Jungle>http://coloradok5.com/gallery/K5Jungle</a>
     
  14. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Yes it is normal...
    Take it out on some gravel or dirt road and try it out.

    Never drive in 4 hi or 4 lo on dry pavement...the front and rear is locked together and you could damage the drivetrain.

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
     
  15. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

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    I agree with trusty. Put it up blocks and check it out. Or try it out on some dirt...DAN

    If it ain't broke.......Don't fix it....
    <a target="_blank" href=http://coloradok5.com/gallery/Gokartergo>KLICK</a>
     
  16. redbeast

    redbeast Registered Member

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    Im have driven mine in 4hi on pavment before ,not very far or very long, but I dont remember any binding or popping ???? ..My diff is open in frount and a eaton gov lock in the rear with 3.43s.........

    1985 Blazer, 305 soon to be a TBI 350, 700r4, msd ign, 3.43s, headers, 31x10.50x15s
     
  17. coopertwpk

    coopertwpk 1/2 ton status

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    Ok my front is a 44 and the rear is a 14 the count on factory gears is 41/11 which is 3.72 now why dont you guys <font color=red>smell some pretty flowers (offensive statement removed)</font color=red> go count your gears and the 44 I have has 45/11 now thats 4/09 now isnt that just funny that he has special count gears and im screwed and have to regear my rear end.
    <font color=red>uhhhh lets be a little less hostile. you made a math error and going off on others that were pretty civil in pointing out the error was childish.
    Grim</font color=red>


    88k5 silverado w4"lift <font color=orange>d44 and corp14ff</font color=orange> with 4.56s<P ID="edit"><FONT class="small">Edited by Grim-Reaper on 09/03/01 03:32 PM.</FONT></P>
     
  18. SAVAGE1

    SAVAGE1 1/2 ton status

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    &lt;blockquote&gt;&lt;font class=&amp;quot;small&amp;quot;&gt;In reply to:&lt;/font&gt;&lt;hr&gt;&lt;p&gt;Ok my front is a 44 and the rear is a 14 the count on factory gears is 41/11 which is 3.72 now why dont you guys <font color=red>smell some pretty flowers</font color=red> and go count your gears

    <hr></blockquote>

    Where did you get "41/11". Scroll up to my original post. I never said 41/11... it is 41/10 which equals 4.10.

    Anyway, I had the truck up on jacks and checked everything out... and it looks fine. With my 10 bolts I could drive on dry pavement with no problems, that's why I was concerned with the binding problem with the new axles. Anybody else have some input on this. If its just a normal thing I guess I'll just live with it. I just don't want to blow up my Tcase.
    Thanks again guys

    Rod
    Alameda, CA
    85 K5 6"ProComp 35"Boggers... and it's still not BIG ENOUGH!!
    &lt;a target=&amp;quot;_blank&amp;quot; href=http://coloradok5.com/gallery/K5Jungle&gt;http://coloradok5.com/gallery/K5Jungle&lt;/a&gt;<P ID="edit"><FONT class="small">Edited by Grim-Reaper on 09/03/01 03:36 PM.</FONT></P>
     
  19. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    first off, relax a little. this is quoted directly from your earlier post.
    <blockquote><font class="small">In reply to:</font><hr>

    41/10 IS 3.73 not 4.11!!!!!!!!!!!!!!!!!!!!!!!!!!!!! your doing DAMAGE


    <hr></blockquote>

    If it was just a typing error then sh!t happens, but 41 divided by 10 is 4.10...

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
     
  20. K5RON

    K5RON 1/2 ton status

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    -------------------------------------------------------------------------
    Ok my front is a 44 and the rear is a 14 the count on factory gears is 41/11 which is 3.72 now why dont you guys <font color=red>smell some pretty flowers</font color=red> and go count your gears and the 44 I have has 45/11 now thats 4/09 now isnt that just funny that he has special count gears and im screwed and have to regear my rear end.

    88k5 silverado w4"lift d44 and corp14ff with 4.56s
    ---------------------------------------------------------------------------

    Little more fuel---------------Your sig says you have 4.56's! Was up wit dat?

    Ron<P ID="edit"><FONT class="small">Edited by Grim-Reaper on 09/03/01 03:37 PM.</FONT></P>
     

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