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Front diff, 3.73 gears

  #11  
Old 02-02-2019, 05:27 PM
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Originally Posted by cleburne red View Post
I have no idea as to what are the most common ratios. If you have your VIN handy, I bet it'll tell, on one of those decoder websites.

You having a SAS done to yours?
I did the SAS a while back. Now I have an enormous pile of leftover parts I need to get rid of, lol.

Originally Posted by christine_208 View Post
My 1999 4wd with AT has 3.73 gears but the best way to check is by the RPO numbers. A quick internet search should bring up the RPO codes for the different ratios. For what it is worth, my rear (and front) axle ratio code is GT4.
Thanks for the info. I'm not with the Blazer right now, so I can't check the code, but I'm going to try the VIN decoder route when I get a few minutes today.

**EDIT**
I tried at least six different VIN decoders, and not one of them told me what gear ratio it had, just what ratios were available (3.08-3.73). So I'll have to wait until I go there.
 

Last edited by Tom A; 02-02-2019 at 05:52 PM. Reason: Added info
  #12  
Old 02-08-2019, 07:59 PM
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Do you still need a differential, or did you get yours fixed? If you still need it, here's my glovebox sticker. See if you can decipher what my ratio is.
 
  #13  
Old 02-08-2019, 09:18 PM
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Originally Posted by Tom A View Post
Do you still need a differential, or did you get yours fixed? If you still need it, here's my glovebox sticker. See if you can decipher what my ratio is
I see a GU6 in there, which is 3.42 ratio. It's all good, though. I reapplied some jb weld, taking the time to actually do it right this time, and it doesn't appear to be leaking. So, fingers crossed, it stays that way.

Thanks for taking the time to check for me, though!
 
  #14  
Old 02-08-2019, 09:26 PM
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Happy to help. Good luck!
 
  #15  
Old 02-14-2019, 03:45 PM
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Standard JB holds up better than Quick,
Years ago I did a freebe for a gal.
A old Toyota car that had a cadavated head from a water port to a cylinder, She was broke and no used head to be found anyways, I sprang for a head gasket and used JB to fill the wash out. Filed it smooth and shaped it to the cylinder shape in the head, 20+ thousand miles later when she sold the car it was still holding strong
 
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