speedo off
03-31-2008, 07:44 PM
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Car: 1991 firebird formula
Engine: 350
Transmission: auto.
Axle/Gears: ?
speedo off
my speedometer is off about 15 to 20 mph slow took it to the dealer they checked everything and it look good ,but the dash speedo cluster looked like it had been changed at some time .is there some body out there that can tell me what is the right speedo for a 1991 firebird 305.or can it be recalibrated or just find another one.
04-01-2008, 01:59 AM
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Car: 1988 GTA
Engine: 5.0 TPI
Transmission: T5
Axle/Gears: 9 Bolt, 3.45
Re: speedo off
The speedometer doesn't need to be calibrated, but your vehicle speed sensor might. There are different sensors for different rear end gears. It's located in the transmission tailshaft, and pretty easy to change. Since your speedo is off by that much, I'm betting it's the wrong sensor.
04-02-2008, 07:32 PM
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Car: 1991 firebird formula
Engine: 350
Transmission: auto.
Axle/Gears: ?
Re: speedo off
as far as i know the trans.&rear are origenal,did not see a tag on the rear end for what gears it has.might need to spin aback wheel and count the drive shaft.the trans has a red gear,now the less teeth will speed up the speedo wright?might try that.
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