I've read comments that the 4:3 axle ratio if preferable for towing.
My 2002 LX470 develops 320 lbs-ft torque @ 3,400 RPMs.
I'm not sure but I assume the Engine develops its maximum torque at this RPM.
I read a lot that one should tow a trailer with Over Drive OFF - and 3-rd gear ratio in
my LX470 is 1.000
Gear Ratios:
1st = 2.804
2cd = 1.531
3rd = 1.000
4th = 0.753
I found a website that shows my 275/16 R70 tires are 31.157" -- BUT, I
measured them and they are actually 29" in diameter.
Went to this calculator which calculates Engine RPM based on tire diameter,
Axle Ratio, and Transmission Ratio ...
Engine RPM / Engine Speed Calculator
... and find that with Over Drive OFF at 3,400 RPMs that vehicle speed is
just over 68 mph.
I'll have to take my LX470 out and verify that 3,400 is at 68 with OD off.
Is this the reason for the towing performance of the 4:3 axle?
My 2002 LX470 develops 320 lbs-ft torque @ 3,400 RPMs.
I'm not sure but I assume the Engine develops its maximum torque at this RPM.
I read a lot that one should tow a trailer with Over Drive OFF - and 3-rd gear ratio in
my LX470 is 1.000
Gear Ratios:
1st = 2.804
2cd = 1.531
3rd = 1.000
4th = 0.753
I found a website that shows my 275/16 R70 tires are 31.157" -- BUT, I
measured them and they are actually 29" in diameter.
Went to this calculator which calculates Engine RPM based on tire diameter,
Axle Ratio, and Transmission Ratio ...
Engine RPM / Engine Speed Calculator
... and find that with Over Drive OFF at 3,400 RPMs that vehicle speed is
just over 68 mph.
I'll have to take my LX470 out and verify that 3,400 is at 68 with OD off.
Is this the reason for the towing performance of the 4:3 axle?
