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Rear End - 97 Tahoe

Discussion in 'Chevy/GMC 4x4' started by jmeccia, Jun 22, 2007.


  1. jmeccia

    jmeccia
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    Ok, quick and basic question here.



    I picked up a 97 2-door Tahoe about a year ago knowing it needed some rear end work (there's a whine that was only noticeable on the highway, but now it's present throughout).



    It's the 350 - not the duramax. It is 4x4. I don't think there were any other options then that would have dictated rear end gear ratios, etc.



    So, my questions are:



    1. what is the gearing ratio (373's?)

    2. would anyone like to recommend a retailer for gears?

    3. i need a pinion shaft bearing too, anyway I can look up that part #?



    Thanks for the info.

    -J
     

  2. mudmonkey

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    Assuming it still has the stock ratio, you could look on the sticker in the glove box and get the RPO code for the axle. I *think* GT4 is for 3.73 gears.



    Or you could jack up one tire on the rear and spin it 20 times while someone counts the number of times the driveshaft goes around. Divide that number by 10. It helps to mark the driveshaft with something to make it easier to count.
     

  3. quick10ss

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    i had 3.42s in my 95 tahoe. personally i would go out and find a 14 bolt semi float axle out of a 3/4 ton chevy. 88 to 98 will bolt right in. ive personally experianced and heard of 10 bolts grenading. but if you want to keep it try drive train depot.com or drive train specialists. they have gears and master install kits at decent prices. good luck
     
  4. Bosco

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    :withstupid:



    if you are going to spend money on the rear end. it would cost just as much to upgrade as it would to repair it
     
  5. mudmonkey

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    And here is some photographic proof of this alleged occurance :D:



    This is what happened to my 10 bolt with a Gov-Loc... I'm currently looking for a 14 bolt. If I can't find a 14 bolt SF rear, I will SAS the 'Burb.







    [​IMG]



    [​IMG]



    [​IMG]



    [​IMG]



    [​IMG]
     
  6. 1BadK10

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    wow..good thing i got a 12 bolt rear...lil bit better..not by much..
     
  7. jmeccia

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    wow, great pics - and thanks for the feedback. Yes, I was looking at a 12-bolt complete rear on ebay but missed it by an hour.

    if i hadn't just dropped $250 on new brakes i'd be very tempted, but since cash is a bit tight, I may just look at new gears.



    i'm off to check out the recommended links.



    thanks for all the help.
     
  8. American

    American
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    I broke 2 10bolts on stock tires, and 1 on 33's. I also broke a 10b front on 39.5's but that's a whole different story haha
     
  9. outalne94z71

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    actually the 12 bolt is weaker, the pinion bearings go out on the 12 bolt and it has smaller shafts



    the 10 bolt is fine if you dont have the g80 or the 3:42 gears(pinion head snaps off)
     
  10. outalne94z71

    outalne94z71
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    which 14 bolt sf you need 8 lug or 6?
     
  11. mudmonkey

    mudmonkey
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    6 lug, 3.73 gears
     
  12. NicksRam4x4

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    my lil brother had a 97 tahoe... went through 3 rears on it before finnaly stripping it and leaving it on the side of the road. biggesr POS. those rears in the tahoe are the worst. i know atleast 5 people who have told me the same thing about them. its a common problem. swap it out!!
     
  13. jimmyt83

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    Rebuilding a rear isn't cheap. If I remember correctly, to have my 14-bolt SF rebuilt, it cost me somewhere around $1200. For that price, you can find a good 14-bolt out of a newer wrecked truck. I'd look to upgrade. The SF axle came with 6 lugs, and had either 3.73 or 4.10 gears in them.



    The 14-bolt FF is the 1-ton rear and it has 8 lugs...you'd have to swap the front axle too if you went to it.
     
  14. jimmyt83

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    Oh yeah...in '97, they didn't offer the d-max...if it was a diesel, it would have been a 6.5 turbo diesel...not that it makes a difference for ya.
     
  15. BigXBear

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    I wheeled with my 10bolt with 35's and 3.73 gears for 4years and nothing has even come close to gone wrong with the rear end.



    Find out what the whine is and fix it. I doubt you will blow it up. Just don't be an idiot and go flooring it all over the place offroad and onroad. :rotfl:



    Now if it cost the same as a 14ff swap may cost to fix it swap it out, you can get 8-6lug spacers for the rear. Then when your ready you can do a SAS up front and your done. Or if you never looking into a SAS you can get a 14bolt FF with 8-6lug conversion at most axle shops.
     
  16. jmeccia

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    I believe the whine is the pinion bearing. I had a 98 Z28 with a similar whine. I replaced the pinion bearing... solved.



    At this stage, that is the cheapest solution. The truck has 170K miles on it - it doesn't hit the mud like it use to anymore and now is just driven daily (and enjoyed much). I'd like to get another 100K out of the truck with no problems, so upgrading for power isn't exactly the most relevant (for this truck at least).



    Awesome insight from everyone though.. thanks!



    -J
     

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