optical speed sensor ?
Thread Starter
Junior Member
Joined: Jul 2006
Posts: 91
Likes: 0
From: Sandtown Delaware
Car: 1987 pontiac Trans Am
Engine: 1988 305 TPI
Transmission: 700R4
Axle/Gears: 2:73 ... I think
optical speed sensor ?
ok took the speed sensor out of my firebirds 700R4 and it is toataly diferent than ive ever seen its black shorter than the otherones almost fits flush with the tranny and it has no gear just a magnatised lip... someone told me its a optical speed sensor hav no idea what year the tranny is .........can anyone tell me what year car had this and wear to get one? THANKS
Senior Member
Joined: Jul 2007
Posts: 1,461
Likes: 1
From: Manchester, CT + Nashua, NH
Car: 90 Firebird Formula
Engine: LO3
Transmission: T5
Axle/Gears: 3.08 one wheel peel
Re: optical speed sensor ?
wait, so firebirds cant swap out gears on the VSS like camaros can? Is this the same for the T5?
Member
iTrader: (2)
Joined: Oct 2003
Posts: 428
Likes: 5
From: Buffalo, NY
Car: 1987 Camaro IROC-Z28
Engine: TPI 350ci L98
Transmission: T56 - Hurst Shifter
Axle/Gears: BW - 3.70
Re: optical speed sensor ?
I'm not sure but I thought the electronic sensors still used gears that needed to be changed to correct for tire size or axel gears.
Re: optical speed sensor ?
That's correct. All 3rd gens use gears for the speedo, even the electronic ones. The sensor the OP is describing sounds like the ones used in 93-up, 4L60E trannys. The newer ones have a reluctor on the output shaft of the trans instead of a drive gear. Makes me wonder if that trans even has a TV cable.
Thread
Thread Starter
Forum
Replies
Last Post
