^ like what they said. The tag you want is the upper right corner. You can also put it on jack stands if the tag is missing, put her in neutral, and see if it turns roughly 4.10 times. The only problem with that is that 3.73 is the most common ratio, and being very close you can confuse them. The driver side door has a sticker. On the part that says axle it, it should say D2 for a 4.10 LSD. For just 4.10 it is 42 on the door sticker under axle.
Not to discourage you, but i thought i finally found the 4.10 with a lsd, and it had the right code, d2, but in fact it had 3.73 with a lsd when i looked at the tag. I was really confused and still am. maybe someone switched, or a factory mess up, or a swap? Just be careful.
You can do the count and turn trick. Turn the axle completely around twice while counting how many times the yoke turns and divide by 2. This gives a better reading for ratios that are as close, like 3:73s and 4:10s.
well had the guy check the axle out all he could find was the assembly code 613b and i had him look in the door and it was a "D4" Limited Slip 3.73 i was so close !!! would it be worth getting and changing the gears? i might be able to get it for 200 ?
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