Thread: First Time For Everything

I have my original trans laying around. Want me to take it apart Dre?

Now that you mention it, I just got a blue speed sensor from Snickers. I got it for my B14 as its electric. All I know is that it works for me.

I would think that with 1 more tooth it is for a little bit smaller tire.

TheRealNighthog, have you checked it vrs a GPS? It might be 2-3 MPH off, not really noticable though.

I did with my phone gps and cant verify accuracy.. its 4 mph off. Im running 225/50/16's

Here is what I gather from this.

Standard speedo gear for SER is Green which comes with 4.176 FD

It seems that higher numerical diff SR16VE and B15 which have 4.437 came with Red The higher numerical diff will read a higher speed on the guage cluster so you will need less teeth to slow it down. This is the same as putting smaller tires on the car.


The Blue speedo gear with more teeth should be for larger tires or lower numerical diffs like say a 3.90 in comparsiosn to (standard SER 4.176). With larger tires the speedo read slower than you are going so you will need more theeth 36 for like on the Blue speedo gear which will speed up the speedo.

But the speedo reads off the diff, so why would they make different speedo drives for different gearsets?

Clearly there are different tooth count has some reason, and i guess the ring on the difs might have different tooth count too?

The diff spins 1:1 with the shafts, regardless of the final drive so maybe its related to the car it came out of, like a Presea or something which aren't terribly common but did have a VLSD.

The speedo does read off of the diff. The tire is also a direct read which effects MPH.

The reason they make diffrent tooth counts is for diff and tire size.

Here is a pic of all the together.

ok did some more searching and here is what I cam up with. There seem to be about 6 diffrent SR20DE LSD gear boxes

Everything at 8000 RPMs with 23 inch tires

15 Gti Pulsar VLSD BLUE speedo gear
1st 3.333 = 42 MPH
2nd 1.955 = 72 MPH
3rd 1.286 = 110 MPH
4th 0.926 = 152 MPH
5th 0.733 = 192 MPH
Final 3.888


N14 Gti Pulsar VLSD Gear Ratios: (RS5F32V)
1st 3.285
2nd 1.850
3rd 1.272
4th 0.954
5th 0.740
Final 4.125:1


Nismo SR16VE N1 RED speedo gear
1st 3.200 = 39 MPH
2nd 2.048 = 60 MPH
3rd 1.500 = 82 MPH
4th 1.152 = 107 MPH
5th 0.872 = 141 MPH
Final 4.437:1


SR16VE VZR RED speedo gear
1st 3.333
2nd 1.955
3rd 1.333
4th 0.975
5th 0.756
Final 4.437:1


B13-B14 SER SR20DE 91-99 GREEN speedo gear
1st 3.063 = 43 MPH
2nd 1.826 = 72 MPH
3rd 1.286 = 102 MPH
4th 0.975 = 134 MPH
5th 0.756 = 173 MPH
Final 4.176:1


P10 G20T 94-95 GREEN speedo gear
1st 3.063 = 43 MPH
2nd 1.826 = 72 MPH
3rd 1.207 = 109 MPH
4th 0.926 = 142 MPH
5th 0.733 = 179 MPH
Final 4.176:1