Anyone hear runnig 4.10's in there 89-93 mustang GT's? How are they on the highway, what kinda rpms does it pull at65-75mph? same questions for 3.73's, thanks
I have 4.10's in my '96 GT. At 70 it runs about 2400-2500. My speedo is a little off, but that is my guess after having people drive next to me and test from there. Both my '89 and old '91 have 3.73's. The '89 is a manual and it runs about 2200 at 70. The '91 is an auto and runs about the same. I think the 3.73's are better for the 5.0 and the 4.10's for the 4.6. Most on the forum agree.
I have a 93 LX, just put 3.73's in.Great gear compared to stock(2.73) good gear for the highway to- 60 mph--2100rpm/70mph---2300/80mph---2500rpm when you get the gear change,buy the correct speedometer gear so they can install it when they do the gears!
Ive got a 90 LX vert that has 3.73 and 2600 nonlockup converter. 75 mph = 2600 rpm. The reason I went 3.73 w/AOD is I do a lot of hwy driving. If you have 5 sp. go 373, AOD 3.73 or 4.10 if mostly around town