Im in the market for a 3:73 diff and i need to know if theres a way to tell without opening the pumpkin? Thanks

 

Count the teeth on the large gear. I believe the 3.73 has a 10 and the 4.30 has 11. can anyone back me up on that?

 

He said without opening the pumpkin. Turn the driveshaft flange and compare the number of turn to the number of times the axel shaft flanges turn. The drive shaft flang will turn just under 4 full rotations for every full rotation of the axel shaft on 3.73 ratio diffs and just over 4 full rotations on 4.10 ratio diffs.

 

I retract my last statement and substitute his

 

Hah thanks, and the 3.73 has quicker acceleration and lower top speed, and the 4.30 has slower acceleration and higher top speed correct? or is it the other way around?

 

Yea its the other way around, the 3.73 will have a higher top speed.

 

Oh ok so the 4:30 has better acceleration? Good thing i didnt trade it cause thats what i want

 

Mhm. 4.30 = Smaller gears. I wouldn't say it's BETTER acceleration, it's just quicker. Shorter power band.