Electronic speed sensor/gear swap
#1
Electronic speed sensor/gear swap
I swapped out the 2.73 gears in favor of the 3.42 (posi) in my 89' t/a, 5.0L TPI - automatic. I believe I have the correct gears (17 red and 44/ light green) But Im running into a problem with the "electronic" speed sensor. My old sensor has the 34-39 stamping on it and I need the 40 & up in a non-cable driven sensor to get the speedo in sync. Any one know of a fix for this? These sensors appear to be hard to find. Someone mentioned that I may need the one from a vette of the same era. Thanks a lot fellas
#3
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Re: Electronic speed sensor/gear swap
I believe the dakota digital sgi-5 is the easy solution.
https://www.amazon.com/Dakota-Digita.../dp/B014N07F8W
https://www.amazon.com/Dakota-Digita.../dp/B014N07F8W
+1
That's how I changed from 2.77 to 3.70 on my 86 TA. Works great.
Use shielded wire for the signal or you get speedo jumping while stopped at a light.
GD
#4
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Car: 86 Trans Am, 92 Firebird
Engine: 408 sbc, 3.1L of raw power
Transmission: TKO600, T5
Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion
Re: Electronic speed sensor/gear swap
Did you try to install the gears onto the sender you have? I was able to use my stock one when I went from 2:73-3:73. I believe my stock gears were red/red
#6
Re: Electronic speed sensor/gear swap
Thanks fellas, it looks like the Dakota box is the only way to go. I was hoping there was an accommodating elect. speed sensor that I could pop in (along w/ the right gears) in the tail shaft for the 40-45 count. Sucks thats all I know.
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