'92 2.73 to 3.42 gear swap. Speedo question
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Senior Member
Joined: Jan 2000
Posts: 543
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From: My Garage - Chicago
'92 2.73 to 3.42 gear swap. Speedo question
I currently have an open 2.73 rear and will be installing an Auburn pro posi with 3.42 gears. I want the speedo to be dead accurate. What is the best method, speedo gears or speedo calibrator? The 3.42 was a factory option in '92, so wouldn't the exact speedo gears be available? Please help!!
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'92 RS, ZZ4/LO5 10:1 350, Edelbrock 6085 heads, Crane 208/214* 467/482" 112* cam, GM/LT4 1.6 roller rockers, Edelbrock Hi-Flow TPI base, runners & 52mm TB, Accel 24#, SLP/Jet-Hot 1-5/8" headers, Catco 3" cat, Flowmaster 3" catback, Hughes 2500 stall converter, stock 700R4, 1LE driveshaft, SFC, Auburn Pro posi w/3.42, 17x9" ZR1 rims w/BFG tires, Medium Quasar Blue w/white SS stripes, Zaino...
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'92 RS, ZZ4/LO5 10:1 350, Edelbrock 6085 heads, Crane 208/214* 467/482" 112* cam, GM/LT4 1.6 roller rockers, Edelbrock Hi-Flow TPI base, runners & 52mm TB, Accel 24#, SLP/Jet-Hot 1-5/8" headers, Catco 3" cat, Flowmaster 3" catback, Hughes 2500 stall converter, stock 700R4, 1LE driveshaft, SFC, Auburn Pro posi w/3.42, 17x9" ZR1 rims w/BFG tires, Medium Quasar Blue w/white SS stripes, Zaino...
Joined: Jul 1999
Posts: 10,950
Likes: 26
From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Whats your tire size?
Do a search on this board and you'll probably find your answer. Its more than likely a 15 tooth and a 43 tooth.
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1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-
Do a search on this board and you'll probably find your answer. Its more than likely a 15 tooth and a 43 tooth.
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1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-
TGO Supporter
iTrader: (2)
Joined: Feb 2000
Posts: 1,235
Likes: 2
From: Avatar: My 34' 1989 Scarab III w/ twin 454's (502's Started!)
Car: 1989 Wellcraft Scarab III
Engine: Twin 454's
Axle/Gears: Twin Mercruiser Bravo I's
<font face="Verdana, Arial" size="2">Originally posted by Kevin91Z:
Whats your tire size?
Do a search on this board and you'll probably find your answer. Its more than likely a 15 tooth and a 43 tooth.
</font>
Whats your tire size?
Do a search on this board and you'll probably find your answer. Its more than likely a 15 tooth and a 43 tooth.
</font>
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1992 Pontiac Firebird Formula (original 305 TBI) The project has begun:
just purchased 1986 Corvette 350 TPI, Summit SLP 1 3/4" Headers, Dual Catco Cats, Flowmaster American Thunder 3" Exhaust, Dual fan setup, OEM Posi, GM 3.42 gears and JEGS Ultimate Support Cover for 7.5 rear.
1997 Chevrolet Camaro SS # 379 (1 of 371 Black, T-Top, 6-speed)
1973 Chevrolet Camaro RS/Z28
1969 Chevrolet Camaro SS 350
RIP Dale Earnhardt.
Senior Member
Joined: Jul 1999
Posts: 994
Likes: 0
From: San Diego, CA
For that size tire, you need:
15T Gray Drive (8642620)
41T Yellow Driven (25513048)
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1989 IROC-Z 5.7L
NOS 5151 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System
15T Gray Drive (8642620)
41T Yellow Driven (25513048)
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1989 IROC-Z 5.7L
NOS 5151 150HP kit
ProBuilt 700R4, PI Vigilante 2800 stall lockup
Baer Brakes 12" Sport System
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