What does axle code 3J mean?

The Ford Super Duty axle code 3j in an indication that Your vehicle is experiencing a 3.55 limited slip. The slip is usually around 3.73 for some Ford trucks, which comes out to a limited slip of 3.75.

Is a 3.55 axle ratio good for towing?

It’s pure mechanics. BEST TOWING RATIO: In general, the best towing axle ratio for most of the post-2010 pickups is in 3.55 or 3.73. Those ratios provide very good acceleration with gas V-8s and diesels.

How do you read a Ford axle code?

The first number is the last digit of the year it was made, the letter indicates the month (A through L for January through December) and the last two digits are the day of the month in a ‘DD’ format. On a Dana axle, the date will be the number stamped on the long shaft nearest the differential housing.

What axle does my F250 have?

For the 2017-2019 F-250, the front axles are still a 35 spline Dana 60 axle. In the back, the 10.5” is still standard but trucks fitted with the Heavy Duty Towing Package are set up with a Dana M275 axle.

Is a 3.31 axle ratio good?

Normally, the 3.31 would get you better gas mileage, on highway. But, with the 3.55 you will get a bit more pulling power so less time at higher RPM to get your trailer moving and when going uphill. If most of your towing is flat highway, the 3.31 should do you fine.

What is a good axle ratio for towing?

The higher the ratio, the more revolutions per minute. Towing: For pickup trucks released after 2010, the best axle ratio for towing falls somewhere between 3.55 and 3.73. This range provides good acceleration for V8 gas and diesel engines.

How do I identify my axle?

To figure out exactly what axle you have, you can look for the Dana stamped bill of materials number. This stamped number can usually be found on the righthand side or on the longer axletube on the same side of the tube as the differential cover, facing the rear of the truck.

What axle ratio do I have?

Here are two ways to find the axle gear ratio of a vehicle: Method 1: Count the number of teeth on the ring gear and the pinion. Divide the number of the ring gear’s teeth by the number of the pinion’s teeth. This will give you the axle ratio.

Does F250 have solid front axle?

The F-250 Super Duty pickup is a no-nonsense heavy-duty machine that rides on a solid front axle that we can’t yet see. The Tremor’s unique shock absorbers mount directly to its front axle housing (green) via this welded-on bracket.

What’s the Axle code on a Ford 3J?

3J is a 3:55 with limited slip. Mine says on the sticker on the door jam (with the gvwr and all that) 3.73LS if I recall correctly. No codes to decipher.

What does my axle ratio, 3J mean?

On my driver side label, it says that my “axle” is a “3J”. Not 35, or anything else, just “3J” as in Jermany. Do you know what the 3 J means? Video Player is loading. This is a modal window. Beginning of dialog window. Escape will cancel and close the window. End of dialog window.

What is the Axle code on a Ford Mustang?

Ford superduty axle codes. and some codes, including the axle code. 3.55 non-limited slip 37 – 3.73 non-limited slip 3h – 3.31 limited slip 3j.

What is the VIN code for a 3J?

X31 is the VIN code for single rear wheel, if that matters to anyone. Wait your code is a 3J and you have 3.73 the table says 3J is 3.55. So best treat for the week I have 3.55 LS and auto lockers just got to check for vacuum leak.