You probably found this if you read the faq over on Pirate...
http://home.4x4wire.com/erik/diffs/#T100-Tundra

And you can look at the faq here to see if your axle ratio code is in there.

<img src="/forums/images/graemlins/cheers.gif" alt="" />


'97 4Runner, '06 F350, '86 4Runner, '05 WR450
http://home.4x4wire.com/erik