3.73 rear axle
Senior User
Joined: Mar 2002
Posts: 136
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From: DALLAS TEXAS
3.73 rear axle
I think it is a great all around gear I pull about a 6000 lb fifth wheel camper and get great fuel mileage both pulling and run down the road empty.unless your in the moutains and pulling one heck of a load the 3.73 gear is all you need.
1999 f250 SD PSD auto trans 3.73 rear axle
1999 f250 SD PSD auto trans 3.73 rear axle
Junior User
Joined: Nov 2001
Posts: 99
Likes: 0
3.73 rear axle
The 3.73 gear ( hopefully limited slip ) is the best all around gears you can get . Especially for every day driving . You'll get your best milage and you still have great torque . It does 70 very comfortably as well only turning 2000rpms .
I love mine that way , tried the 4.10 (11?) and it was just too much for everyday and highway . I'd only go 4.10 if I had to pull heavy loads constantly or was setting up for 1/4 mile drags .
Petre
I love mine that way , tried the 4.10 (11?) and it was just too much for everyday and highway . I'd only go 4.10 if I had to pull heavy loads constantly or was setting up for 1/4 mile drags .
Petre
Sit. Stay.
Joined: Oct 2001
Posts: 18,308
Likes: 20
From: Washington State
3.73 rear axle
>Can somebody explain the 3.73 ratio. Is this axle geared
>lower for towing or do I have it backwards ?
Let me see if this is right.
With a rear axle ratio of 3.73 to 1. the driveshaft will turn 3.73 times for every 1 rotation of the wheel.
The higher the number the lower the gearing. So, 4.30's are lower gears even though they are numerically higher.
Lower gears are good for towing becuase they put the engine in the meat of the power band sooner. The 3.73's are probably the best, as stated before, all around gearing for our trucks in stock form without heavy 6K+ loads involved.
>lower for towing or do I have it backwards ?
Let me see if this is right.
With a rear axle ratio of 3.73 to 1. the driveshaft will turn 3.73 times for every 1 rotation of the wheel.
The higher the number the lower the gearing. So, 4.30's are lower gears even though they are numerically higher.
Lower gears are good for towing becuase they put the engine in the meat of the power band sooner. The 3.73's are probably the best, as stated before, all around gearing for our trucks in stock form without heavy 6K+ loads involved.
Posting Guru
Joined: May 2001
Posts: 1,702
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3.73 rear axle
>Let me see if this is right.
>
>With a rear axle ratio of 3.73 to 1. the driveshaft will
>turn 3.73 times for every 1 rotation of the wheel.
>
>The higher the number the lower the gearing.
>So, 4.30's are lower gears even though they are numerically
>higher.
Yep, you are right monsta
Les
Sit. Stay.
Joined: Oct 2001
Posts: 18,308
Likes: 20
From: Washington State
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Posting Guru
Joined: Mar 2002
Posts: 1,429
Likes: 2
3.73 rear axle
4.10's would help.
I suspect that 3.73's with the V-10 would deliver fuel mileage at least as good as the 5.4 engine 4.10 axle combination and would yield more pulling power.
I suspect that 3.73's with the V-10 would deliver fuel mileage at least as good as the 5.4 engine 4.10 axle combination and would yield more pulling power.
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Senior User
Joined: Mar 2002
Posts: 297
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From: Canada
3.73 rear axle
I've owned a few trucks over the past while all 460 powered auto's well 3 (but the one I bought for $700 doesn't count)first with 4.10s, 2nd 3.73 (460 with flat tops and a cam super fast)the last one a 5 spd with 3.55s the 3:73 RULE for all round stuff. I haul a 2200lb(3000 wet with our stuff for four for two weeks inside) plus camper with big wind resistance.
Power band(I think)is similar between the 10 and 460. My milage differed by about 2mpg, worst 9mpg best 12mpg(except for the hot one it was about 6 or 8)between all trucks. My new V10 has 3.73s and hauls a-- has lots of low end and way lots of high end
power. returns an even 10mpg at 65 or 70 mph (loaded)
The thing's you have to look at are torque curve for the engine of choice, use of the vehicle and gearing. And pick the gears that meet the curve and intended use of the vehicle. If its unloaded most of the time and you want economy the taller the better (lower numericaly)
But as someone else said for resale 3.73 is probably the best bet.
Hope this helps.
Gord S
Power band(I think)is similar between the 10 and 460. My milage differed by about 2mpg, worst 9mpg best 12mpg(except for the hot one it was about 6 or 8)between all trucks. My new V10 has 3.73s and hauls a-- has lots of low end and way lots of high end
power. returns an even 10mpg at 65 or 70 mph (loaded)The thing's you have to look at are torque curve for the engine of choice, use of the vehicle and gearing. And pick the gears that meet the curve and intended use of the vehicle. If its unloaded most of the time and you want economy the taller the better (lower numericaly)
But as someone else said for resale 3.73 is probably the best bet.
Hope this helps.
Gord S
