305 tbi 5spd help...
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Joined: Sep 2002
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Car: 1992 camaro rs 97 yoyota camry
Engine: lo3 carbed
Transmission: t 5
305 tbi 5spd help...
well my speed sensor or sommething else is not working right... so i pulled the sensor off and it has good teeth on t the gears.
it is a 92 so it does not have a cable. any way i was wondering if anyone on here could tell me what rpms should equal certain speeds in my car, i am making a long trip tomorow and the speed ranges from 45 to 70 mph... so i would love to get the rpm in 5th gear for 55, 65, 75, 80 mph it has the stock tire size 215/65/15's on there. also does anyone know if there is any mag articles on file anywhere that tell the stock 1/4 mile times for a 92... and not just someones guess. i want to see how much my car need to imporve? i did a search and found no good info just lots of diffrent numbers.... any help will be much apreciated... oh also gm 's speed sensor price was 90.00 yikes... advanced and auto zone could not tell mt the crossover partnumber that they use so i can't buy the 35 dollar one... they don't keep them in stock and to get one you have to pay ahead but there are 3 to choose from so i might be screwed!!! well thanks for any info you can provide!!!
it is a 92 so it does not have a cable. any way i was wondering if anyone on here could tell me what rpms should equal certain speeds in my car, i am making a long trip tomorow and the speed ranges from 45 to 70 mph... so i would love to get the rpm in 5th gear for 55, 65, 75, 80 mph it has the stock tire size 215/65/15's on there. also does anyone know if there is any mag articles on file anywhere that tell the stock 1/4 mile times for a 92... and not just someones guess. i want to see how much my car need to imporve? i did a search and found no good info just lots of diffrent numbers.... any help will be much apreciated... oh also gm 's speed sensor price was 90.00 yikes... advanced and auto zone could not tell mt the crossover partnumber that they use so i can't buy the 35 dollar one... they don't keep them in stock and to get one you have to pay ahead but there are 3 to choose from so i might be screwed!!! well thanks for any info you can provide!!!
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Joined: Apr 2001
Posts: 4,969
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From: USA
Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
This should do it for ya. 
https://www.thirdgen.org/newdesign/t...ulations.shtml
And I cut and pasted this part from this --->
https://www.thirdgen.org/newdesign/faq/thirdgen.shtml
https://www.thirdgen.org/newdesign/t...ulations.shtml
And I cut and pasted this part from this --->
https://www.thirdgen.org/newdesign/faq/thirdgen.shtml
Q: I want to buy speedometer drive/driven gears, what are the part numbers and combinations?
A: Here is a list of GM part numbers for drive and driven speedometer gears, as well as some combinations that are known to work:
Part No.....Teeth.....Color....Sleeve*
25513042...35......Orange........25007338
25513043...36......White..........25007338
25513044...37......Red.............25007338
25513045...38......Blue............25007338
25513046...39......Brown.........25007338
25513047...40......Black...........25007339
25513048...41......Yello............25007339
25513049...42......Green..........25007339
25513050...43......Purple..........25007339
25513051...44......Dk Gray........25007339
25513052...45......Lt Blue.........25007339
*Some applications may use Sleeve No. 25007224 or 10456092 in place of 25007338, or 25007308 or 1045089 in place of 25007339.
Red Drive Gear Combinations
With drive gear number 8640517, (red, 17 teeth) the following combinations apply:
Axle......Tire Dia......Driven Gear
Ratio....(Nominal)...(Tooth Count)
2.59........26.0........35
..............25.7........36
2.73........26.0........37
..............25.7........38
2.87........26.0........39
3.07........26.0........42
3.31........26.0........45
Gray Drive Gear Combinations
With drive gear number 8642620, (gray, 15 teeth) the following combinations apply:
Axle......Tire Dia......Driven Gear
Ratio....(Nominal)...(Tooth Count)
3.33........25.7........40
3.45........25.7........41
3.54........26.0........42
..............25.7........43
Lower ratio (higher numerically) rear or smaller diameter tire requires higher driven gear tooth count. Increasing or decreasing driven gear tooth count by one will usually accommodate a 1/4" to 1/2" change in tire diameter.
A: Here is a list of GM part numbers for drive and driven speedometer gears, as well as some combinations that are known to work:
Part No.....Teeth.....Color....Sleeve*
25513042...35......Orange........25007338
25513043...36......White..........25007338
25513044...37......Red.............25007338
25513045...38......Blue............25007338
25513046...39......Brown.........25007338
25513047...40......Black...........25007339
25513048...41......Yello............25007339
25513049...42......Green..........25007339
25513050...43......Purple..........25007339
25513051...44......Dk Gray........25007339
25513052...45......Lt Blue.........25007339
*Some applications may use Sleeve No. 25007224 or 10456092 in place of 25007338, or 25007308 or 1045089 in place of 25007339.
Red Drive Gear Combinations
With drive gear number 8640517, (red, 17 teeth) the following combinations apply:
Axle......Tire Dia......Driven Gear
Ratio....(Nominal)...(Tooth Count)
2.59........26.0........35
..............25.7........36
2.73........26.0........37
..............25.7........38
2.87........26.0........39
3.07........26.0........42
3.31........26.0........45
Gray Drive Gear Combinations
With drive gear number 8642620, (gray, 15 teeth) the following combinations apply:
Axle......Tire Dia......Driven Gear
Ratio....(Nominal)...(Tooth Count)
3.33........25.7........40
3.45........25.7........41
3.54........26.0........42
..............25.7........43
Lower ratio (higher numerically) rear or smaller diameter tire requires higher driven gear tooth count. Increasing or decreasing driven gear tooth count by one will usually accommodate a 1/4" to 1/2" change in tire diameter.
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