speedometer gear question

[PaulBZ65]

Hi all. I have a 3.08 rear end in my 87' Monte with the 200-4r. I am looking to swap in a 3.42 rear soon and know the correct gears are 11 and 30 teeth for that. I am wondering if anyone knows what gears might be in my LS's 2004r...just curious if one might be the same as the ones I need, to save a bit of work . TIA!

BTW, the wheel diameters are 25.6" if that matters(16x8 IROCs), stock they came with the neato 195x75x14 hubs which measure out to 25.5" by my calculations.

 

[Nordbert]

Speedo gears

The sheet I got from my GM dealer shows the following gears are to be used in a 200-4r with 3.08 axle and 195/75/14 tires: Drive gear "D" (Red) 12T
8634935. Driven gear "W" (Blue) 30T 25524925. Time to break out that flashlight and inspection mirror!

 

[PaulBZ65]

Thanks!

Looks like the 30 is obviously the same, just what I was wondering about.