What size is the ring and pinion

[Nimrod_R]

I have a 2004 Tahoe 4.8 L automatic and was wondering what size the ring and pinion gears are? I thought the rear end was supposed to be a 10 bolt, 8.6, 30 spline axles?

I already know I have 3.42 gears and wanted to buy 3.73 or 4.10 but just not sure what size the ring and pinion is before I order some.

 

[sixty9fordkiller]

Im positive (but not too sure if its required or not for 3.73s or not) if you're gonna go up on gear, your gonna need to recalibrate the computer or you'll get the ABS light on in the dash! i.e. hypertech programmer!

 

[Nimrod_R]

I already found the answer to my question, I forgot I had posted this. Its an 8.5 ring and pinion. I know that I have to fix the speedo, I have hp tuners for that. Thanks anyway.........