cuci591

I'm thinking of swapping in a Viper t56 trans. I will faceplate the gears so it can handle high rpm shifts. The stock viper t56 trans is rated to hold almost 500ft/lb of torque from the factory. My question is what would be the mph per gear be as this would change everything up. My rear diff is a r200 (4.09 gear ratio) out of a 300zx (inlinepro kit)and the viper t56 trans is as follows.

1st Gear 2.66:1
2nd Gear 1.78:1
3rd Gear 1.30:1
4th Gear 1.00:1
5th Gear 0.74:1
6th Gear 0.50:1

I have tried to use some online converter scales and I guess i'm just to stupid to figure out how to use it. So if anyone could chime in that would be great.

Thanks in advance

robrob

SC_Highlander

Those are some TALL gears!

CKit

Any reduction gear in that trans?

robrob

I assumed no in my chart since my understanding is most transmissions don't have one, so I set it to 1.0.

cuci591

No there is no reduction gear. So if im reading the chart correctly mph and gear is read left to right and up and down is rpm.

robrob

RPM is the far left column. So for 4000rpm your speed in 6th gear is 145.7mph. Like SC_Highlander said, the transmission gearing is way too high to work in the S2000. Even with 5.10 differential gearing 146mph comes at only 5000rpm in 6th and 5th gear gives 7500rpm at 148mph.

ack5252

Did you use the Turn Zero gear calculator? If not type "turn zero gear calculator" into google and it'll come up, works really well.

And I think the T56 is rated for way more than that isn't it?

I know the viper 6th gear is extremely high, didn't realize 4/5 were so bad too

robrob

The calculator I use in this thread is just an XL spreadsheet that I found online for my GSX-R1000 a long time ago.

cuci591

Yeah the viper top speed is around 200mph