differential swap or not

[Newschooler]

Hell, I'm a brand newbie on this board and I plan on buying a supra TT in a couple of years.


However I am not a newbie in mechanics so I couldn't resist to add some information here.
What kkiepvvessau wants to say, is that the differential does more than just turning the wheels. It also amplifies power just like a gear.

So lets say your engine devellop 200lb of torque at the flywheel. 200lb of torque isn't really alot to move a 3000lb and + car. Thats when the tranny and differential comes into play.

Lets say your first gear got a ratio of 3.0 and your differential a ratio of 3.1
The power your wheels will put on the ground will be: 3.0*3.1*200=1860lb/tq

Now that more likely to move your car. If you swap a lower gear ratio diff, you'll get: 3.0*3.7*200=2220lb/tq. Thats 360lb of torque to the wheels more right there just with that new differential. Not bad huh.

Anyway, I dunno if you all were aware of that, don't want to sound like a smart ass.

[SKILMATIC]

Originally Posted by Newschooler

Hell, I'm a brand newbie on this board and I plan on buying a supra TT in a couple of years.


However I am not a newbie in mechanics so I couldn't resist to add some information here.
What kkiepvvessau wants to say, is that the differential does more than just turning the wheels. It also amplifies power just like a gear.

So lets say your engine devellop 200lb of torque at the flywheel. 200lb of torque isn't really alot to move a 3000lb and + car. Thats when the tranny and differential comes into play.

Lets say your first gear got a ratio of 3.0 and your differential a ratio of 3.1
The power your wheels will put on the ground will be: 3.0*3.1*200=1860lb/tq

Now that more likely to move your car. If you swap a lower gear ratio diff, you'll get: 3.0*3.7*200=2220lb/tq. Thats 360lb of torque to the wheels more right there just with that new differential. Not bad huh.

Anyway, I dunno if you all were aware of that, don't want to sound like a smart ass.

No that was a great post. However, it still distributes the power that was transfered from the tranny. A diff does nothing but distribute power to the wheels. It has nothing to do with power transfer. In order to transfer something you must change it to another form. Which the tranny does. The diff just takes that power from the tranny and distributes it to the wheels. I hope I am making sense too.

[Newschooler]

Originally Posted by SKILMATIC

No that was a great post. However, it still distributes the power that was transfered from the tranny. A diff does nothing but distribute power to the wheels. It has nothing to do with power transfer. In order to transfer something you must change it to another form. Which the tranny does. The diff just takes that power from the tranny and distributes it to the wheels. I hope I am making sense too.

I think there is a bit of missunderstanding here. Yes you are right, the differential does only one thing: The distribution of the power to the wheels, just like you say. I was talking about the FINAL DRIVE, which is often in the differential housing of a FWD car so I don't know about RWD cars like a supra. But that could be why there is alot of articles that talk about a 3.7 differential instead of saying a 3.7 final drive.

[SKILMATIC]

Originally Posted by Newschooler

I think there is a bit of missunderstanding here. Yes you are right, the differential does only one thing: The distribution of the power to the wheels, just like you say. I was talking about the FINAL DRIVE, which is often in the differential housing of a FWD car so I don't know about RWD cars like a supra. But that could be why there is alot of articles that talk about a 3.7 differential instead of saying a 3.7 final drive.

O ok sorry if i misconstrued your demeanor.

[Newschooler]

No no its my fault

[suprra_girl]

glad to see everyone is playing well

[SKILMATIC]

Originally Posted by suprra_girl

glad to see everyone is playing well

There is no reason to be mad. Everyone here is very cool. This is why I love this forum. Everyone is so polite to each other. Every other forum I have been to its like a flame fest or something.