3.73s and 4.10 difference?
04-04-2010, 08:34 AM
#3
Cut & Paste Expert
Join Date: May 2007
Location: NW Arkansas
Posts: 13,322
One has more teeth and the other has less teeth...
One takes 3.73 revs of the pinion/driveshaft (input) to turn the wheels one revolution (output).
The other takes 4.10 revs of the pinion/driveshaft (input) to turn the wheels one revolution (output).
Its an input to output ratio.
3.73 to 1 or 4.10 to 1
3.73 =s higher top end at redline.
4.10s =s more take-off power.
It also changes the effective gear spacing in the transmission and such.
Tire sizing over OEM sizes can also play a factor when choosing 3.73s over 4.10s.
4.10s and you will shift sooner off the line than with 3.73s but your top end will suffer...
One takes 3.73 revs of the pinion/driveshaft (input) to turn the wheels one revolution (output).
The other takes 4.10 revs of the pinion/driveshaft (input) to turn the wheels one revolution (output).
Its an input to output ratio.
3.73 to 1 or 4.10 to 1
3.73 =s higher top end at redline.
4.10s =s more take-off power.
It also changes the effective gear spacing in the transmission and such.
Tire sizing over OEM sizes can also play a factor when choosing 3.73s over 4.10s.
4.10s and you will shift sooner off the line than with 3.73s but your top end will suffer...
Last edited by 157dB; 04-04-2010 at 08:39 AM.
04-04-2010, 07:26 PM
#5
2nd Gear Member
Join Date: Mar 2009
Location: Florida
Posts: 234
Out comes my old spreadsheet, there are much better ones around, but this gives you some numbers to compare:
I went with 3.73's because I had some concern about highway RPM's at 80. When I'm on the interstate I usually am doing 80 or more - I don't drive interstate that much, but enough it was a concern for me. From the spreadsheet you can see that you will tach just under 2700 RPM doing 80 with 3.73's. 2900 RPM for 4.10s. Its probably not such a big deal, but when I'm on long rides I wanted to keep RPM's lower.
For off the line, the 4.10s are going to be better, if I wasn't concerned about highway RPMS, I probably would have gotten the 4.10s. This is pretty much what is said around here: If you are going to be doing a lot of highway driving stay with 3.73s (to limit highway RPMS/MPG), if not go 4.10.
I actually still seem to see about 1MPG better around the city than before with the 3.73s. Goofing around, I can just give it some gas and spin the tires, much easier to do with the 373s vs the original 3.31. I bet 4.10s are even more fun.
Its all in what your needs are: do your just drive in town or do you drive a lots of highway miles?
I went with 3.73's because I had some concern about highway RPM's at 80. When I'm on the interstate I usually am doing 80 or more - I don't drive interstate that much, but enough it was a concern for me. From the spreadsheet you can see that you will tach just under 2700 RPM doing 80 with 3.73's. 2900 RPM for 4.10s. Its probably not such a big deal, but when I'm on long rides I wanted to keep RPM's lower.
For off the line, the 4.10s are going to be better, if I wasn't concerned about highway RPMS, I probably would have gotten the 4.10s. This is pretty much what is said around here: If you are going to be doing a lot of highway driving stay with 3.73s (to limit highway RPMS/MPG), if not go 4.10.
I actually still seem to see about 1MPG better around the city than before with the 3.73s. Goofing around, I can just give it some gas and spin the tires, much easier to do with the 373s vs the original 3.31. I bet 4.10s are even more fun.
Its all in what your needs are: do your just drive in town or do you drive a lots of highway miles?
