Tranny/speedo help
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Car: 1991 firebird formula
Engine: 305
Transmission: 700r4
Axle/Gears: 3.42
Tranny/speedo help
So I got my 91 firebird a couple weeks ago. I wad told it needed a speed sensor. So after doing some research and calling the dealer my car came factory with a manual tranny and someone switched it out for a 700r4. So what can I do to get the speedo working properly? Dealer said I have the 3.42 rear end and It was taken to a tranny shop by previous owner and I spoke with them and they said something about the gears in the tail shaft of the tranny. Just looking for some guidance to get it fixed. Thanks in advance.
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Car: 1991 firebird formula
Engine: 305
Transmission: 700r4
Axle/Gears: 3.42
Re: Tranny/speedo help
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Car: 1991 firebird formula
Engine: 305
Transmission: 700r4
Axle/Gears: 3.42
Re: Tranny/speedo help
#6
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Re: Tranny/speedo help
Yeah I've been there I have been searching all over trying to find what I had from the factory so I can then figure out where I need to be for the 700r4. Originally with the manual it had the 7 tooth purple and a 19 tooth driven. So now I just need to figure out where I need to be for the 700r4.
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Re: Tranny/speedo help
You didn't say what parts it has (or post pictures) or tire size.
http://www.transmissioncenter.net/sp...n_______va.htm
You need #54X. Speedometer drive gear, comes in 15, (you need 15)
and
#55XX. Speed sensor for above 40 to 45 tooth driven gear.
and
#55. Driven gears for gear driven electronic speedometers (you need 41 or 42 depending on tire size.)
A 1991 Firebird 700-R4 has a speedo gear-driven VSS and needs the proper gears (drive on the output shaft and driven on the VSS) to be accurate.
http://www.transmissioncenter.net/sp...n_______va.htm
You need #54X. Speedometer drive gear, comes in 15, (you need 15)
and
#55XX. Speed sensor for above 40 to 45 tooth driven gear.
and
#55. Driven gears for gear driven electronic speedometers (you need 41 or 42 depending on tire size.)
A 1991 Firebird 700-R4 has a speedo gear-driven VSS and needs the proper gears (drive on the output shaft and driven on the VSS) to be accurate.
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Car: 1991 firebird formula
Engine: 305
Transmission: 700r4
Axle/Gears: 3.42
Re: Tranny/speedo help
You didn't say what parts it has (or post pictures) or tire size.
http://www.transmissioncenter.net/sp...n_______va.htm
You need #54X. Speedometer drive gear, comes in 15, (you need 15)
and
#55XX. Speed sensor for above 40 to 45 tooth driven gear.
and
#55. Driven gears for gear driven electronic speedometers (you need 41 or 42 depending on tire size.)
A 1991 Firebird 700-R4 has a speedo gear-driven VSS and needs the proper gears (drive on the output shaft and driven on the VSS) to be accurate.
http://www.transmissioncenter.net/sp...n_______va.htm
You need #54X. Speedometer drive gear, comes in 15, (you need 15)
and
#55XX. Speed sensor for above 40 to 45 tooth driven gear.
and
#55. Driven gears for gear driven electronic speedometers (you need 41 or 42 depending on tire size.)
A 1991 Firebird 700-R4 has a speedo gear-driven VSS and needs the proper gears (drive on the output shaft and driven on the VSS) to be accurate.
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Car: '86 Camaro, '94 Camaro, 3 others
Engine: LG4 ->L29, L32->LR4, L36, LG4, L31
Transmission: 700R-4, T5WC, 4L80E, SM465, 4L60E
Axle/Gears: 3.42, 3.23, WTB/WTT 2.93
Re: Tranny/speedo help
Yeah I've been there I have been searching all over trying to find what I had from the factory so I can then figure out where I need to be for the 700r4. Originally with the manual it had the 7 tooth purple and a 19 tooth driven. So now I just need to figure out where I need to be for the 700r4.
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Car: '86 Camaro, '94 Camaro, 3 others
Engine: LG4 ->L29, L32->LR4, L36, LG4, L31
Transmission: 700R-4, T5WC, 4L80E, SM465, 4L60E
Axle/Gears: 3.42, 3.23, WTB/WTT 2.93
Re: Tranny/speedo help
I don't know what parts the 700r4 has inside I was just told to find what gears the manual had from the factory and go from there which I posted above what it had it. So those parts are what I need even though the 700r4 wasn't stock in this car? And if has 16 in rims on it now but they aren't factory wheels
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Car: 1991 firebird formula
Engine: 305
Transmission: 700r4
Axle/Gears: 3.42
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Car: 1991 firebird formula
Engine: 305
Transmission: 700r4
Axle/Gears: 3.42
Re: Tranny/speedo help
I appreciate all the help. I was slow to understand what all I needed to get. Hoping tomorrow to check and see what i have and order parts. So 15t drive and 42 gear driven is what I need.
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Car: 1991 firebird formula
Engine: 305
Transmission: 700r4
Axle/Gears: 3.42
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Car: '86 Camaro, '94 Camaro, 3 others
Engine: LG4 ->L29, L32->LR4, L36, LG4, L31
Transmission: 700R-4, T5WC, 4L80E, SM465, 4L60E
Axle/Gears: 3.42, 3.23, WTB/WTT 2.93
Re: Tranny/speedo help
Most 700R-4s came with 17s or 18s. If you have a red 17, then a 45 should be close enough, if you can find one. If you find you have a 19 tooth drive gear, I'll trade you a new 15 for it, I'll pay both shippings, if you can remove it without any damage. They like to crack / split.
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Car: 1991 firebird formula
Engine: 305
Transmission: 700r4
Axle/Gears: 3.42
Re: Tranny/speedo help
Most 700R-4s came with 17s or 18s. If you have a red 17, then a 45 should be close enough, if you can find one. If you find you have a 19 tooth drive gear, I'll trade you a new 15 for it, I'll pay both shippings, if you can remove it without any damage. They like to crack / split.
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Car: '86 Camaro, '94 Camaro, 3 others
Engine: LG4 ->L29, L32->LR4, L36, LG4, L31
Transmission: 700R-4, T5WC, 4L80E, SM465, 4L60E
Axle/Gears: 3.42, 3.23, WTB/WTT 2.93
Re: Tranny/speedo help
With 17:45, less chance of a speeding ticket, you'll be going slightly slower than what your speedometer shows.
Using the info in the sticky, it would be 15:40. But if you correct for tire loading ( I don't ) then my math shows 15:41.46.
No matter what we tell you, you still must decide what's best for you.
Get under there, see what's in it now. Changing dive gears in-car is hell even when you do try to destroy the old one.
You can change which style of VSS and just get one of those little inline corrector boxes from transmissioncenter.net, that's easy, but not cheap.
Using the info in the sticky, it would be 15:40. But if you correct for tire loading ( I don't ) then my math shows 15:41.46.
No matter what we tell you, you still must decide what's best for you.
Get under there, see what's in it now. Changing dive gears in-car is hell even when you do try to destroy the old one.
You can change which style of VSS and just get one of those little inline corrector boxes from transmissioncenter.net, that's easy, but not cheap.