I found this here http://www.skulte.com/T56.html "The two areas that will be a little messy are fabricating a transmission crossmember, and using the electronic speed signal. If you have a 90+ Camaro or an 87+ Firebird you already have an electronically driven speedometer." I posted before asking when electronically driven speedos came out instead of cable driven. I got the reply of '90, so what is right? Could it be cable or electric , was it an option? Is a 4th gen driveshaft the same length as a 700R4/T-5 third gen driveshaft? Oh one more thing, of someone wants to swap to a T56 why can't they use the crossmember off of a 4thgen donor car? ------------------ 1985 Camaro IROC-Z LB9 1989 Pontiac Firebird Formula W6S LO3 TBI 305 -180 degree stat -Hooker Cat-Back [This message has been edited by Keith5 (edited December 29, 2000).]

The article is correct. Electronic speedos came out in all 1990+ cars for Camaros, and all 1987+ cars for Firebirds.

Yes the driveshafts are the same length and are interchangable.

The shape of the 4th gen crossmember is different and wont fit the thirdgen frame.

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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=-

D7C : GEAR, SPEEDO DRIVEN
D9A : SENSOR, VEH SPD
E5Z : SPEEDOMETER ADAPTER (DELETE)
E9Z : SPEEDOMETER KEY (DELETE)


These are from my '89 Formula. What do they mean?

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1985 Camaro IROC-Z LB9

1989 Pontiac Firebird
Formula W6S LO3 TBI 305
-180 degree stat
-Hooker Cat-Back