How do you tell gear ratio?

[Kevin2811]

How can you tell what ratio a gear is?

 

[WLD_WST]

my 98 had a tag on the rear telling it had a 2.73

 

[WhiteDevil69]

How can you tell what ratio a gear is?

count the teeth!

 

[Kevin2811]

My buddy has a set of unused 8.8 gears but he can't remember if they are 3.73's or 4.10.

 

[HIGDON]

It's stamped on the pinion head and on the side of the ring gear.

 

[00GTblkvert]

I believe it like this -- raise the rear of your car, rotate the rear tire one revolution - watch the driveshaft as it turns. If it turns a little over 3 times you probably have 3.23's -- turns 4 times you could have 4.10's and so on. Hope this helps.

 

[Kevin2811]

Thanks for the help. The gears are unused and not installed. The ring has 41 teeth and the pinion has 10. I think that equals 4.10. Anyone know?

 

[twogts4us]

Thanks for the help. The gears are unused and not installed. The ring has 41 teeth and the pinion has 10. I think that equals 4.10. Anyone know?

That would be 1:4.1 - you are correct!!!

 

[Kevin2811]

Thanks for the help as always!

 

[Arnolds97]

My 97 Automatic has a tag that reads 3L08 which i am assuming means 3.08's.

 

[stangman]

I believe it like this -- raise the rear of your car, rotate the rear tire one revolution - watch the driveshaft as it turns. If it turns a little over 3 times you probably have 3.23's -- turns 4 times you could have 4.10's and so on. Hope this helps.

close but not quite pretty much reverse of what you just said. turn the axle one rotation, & if the tires make 4.10 rotations around, per one rotation of the driveshaft. you my friend would have 4.10 gears

 

[KaPPaBaLL]

close but not quite pretty much reverse of what you just said. turn the axle one rotation, & if the tires make 4.10 rotations around, per one rotation of the driveshaft. you my friend would have 4.10 gears

no, he's right you're wrong.

 

[HIGDON]

Yep, tire rotates once, driveshaft rotates multiple times(Ring is bigger than pinion therefore ring moves slower than pinion...)

 

[kirkyg]

find out what mph you go in what gear at what rpm and you can ask on here and we can tell you.

kirkyg

 

[KaPPaBaLL]

here's another one. put car in 4th gear.. drive at 70mph... read the tachometer. Whatever that says is your gear ratio. those are the only two ways i know of.

 

[DJsZincGT]

close but not quite pretty much reverse of what you just said. turn the axle one rotation, & if the tires make 4.10 rotations around, per one rotation of the driveshaft. you my friend would have 4.10 gears

Yeh man he was correct, the driveshaft would turn 4.10 times to the wheels turning once. Sorry man, just poking at ya a little.

 

[Kevin2811]

Thanks for all the help! 4.10's about to go in!

 

[CottonBurnerz]

ok I want want to get this opportunity and ask about the gear ratio thingy.. I surfed around sites and see lots of gears info then I cam across a chart like this..

1st gear - .345
2nd gear - 1.34
3rd gear - 2.11
4th gear - .433
5th gear - .923

final gear ratio - 2.340

what the hell do those mean? How do they related to the gear ratio the car has? (3.27, 4.10, etc..)

 

[stangman]

Yeh man he was correct, the driveshaft would turn 4.10 times to the wheels turning once. Sorry man, just poking at ya a little.

what was i thinking i don't even remember posting that

 

[stangman]

ok I want want to get this opportunity and ask about the gear ratio thingy.. I surfed around sites and see lots of gears info then I cam across a chart like this..

1st gear - .345
2nd gear - 1.34
3rd gear - 2.11
4th gear - .433
5th gear - .923

final gear ratio - 2.340

what the hell do those mean? How do they related to the gear ratio the car has? (3.27, 4.10, etc..)

i'm not exactly sure how they do the gear ratio through the tranny. the 4.10 is the final DRIVE ratio though, which, if im not mistaken is, completely different than the final gear ratio someone will call me on it if i'm wrong