OK guys i have been given the run around for month about what i need to do to recalibrate my speedo..i havent put them in yet..what i'm hoping is theres someone with a 92 rs that had 2.73 that has done a swap to 3.73 and can tell me how much the speedo was off and how they fixed it..92 models have speed sensors so i cant use a drive adapter cause theres no speedo cable...i have 17 teeth drive and 37 teeth driven...i have gone through countless combinations trying to get it right or at least close enough..once i start changing the driven i encounter needing a new sleeve too which is about 85 bucks....hopefully someone has done this and can tell me how many mph they are off or were off and what they did to fix it..i've read all the posts about this and they just dont seem to apply to the vss system..thanks guys

 

Try a 15 tooth drive (8642620) and a dark-grey driven (25513051). Yes you will need a new sleeve (25007339).

 

with 255/50r16(26" tall)speedo read exaclty 90 when i was going 70. read 45 when going 35. this was a 2.73 to 3.73 swap.
I never fixed it so i don't know witch new gears you need.
Hope this helps.

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'88 RS (originally 2.8)
New 350, .040 over, ported vette L98s, ported stock tpi.
Old 305 injectors & chip
TES headers, 3.73 gears, 700r4.
Best with 2.8-17.4@77mph
Best with 305-15.0@93mph
Best with 356-13.7@101mph
(Damn the 2.8!)

 

15 tooth and a 45 tooth, like Apeiron said.

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West Coast GM Shootout 2001!
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

Talk to the dealer a gear is cheap only 10-20 bucks if its an auto. just make sure to have all your info correct tire size ect.

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85 Camaro RS 350/350 stealth intake, holley street avenger 670
true dual exhaust. "ButtStang killer"
82 firebird 305 all original - the cat and smog crap."All show No go"