When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
How can I identify what gears I have in my truck? By taking the diff cover off the rear axle and counting the teeth on the ring/pinion? Or is it stamped somewhere? Also my f350 currently has a Dana 44 up front, but when I bought it it had a Dana 60 snow fighter front axle (which this site helped me determine) in the bed. Are the front and rear gears the same size so if they both have the same teeth on them then they're the same ratio? The front Dana 60 is not seized up everything rotates freely and I'd love to put that on the truck soon. I'm sure I need to tear into it to double check everything is in good order.
The ring gear will be stamped with the tooth count, 41-10 etc divide large # by small. Or an easier way is jack truck up, mark the bottom of both tires and bottom of driveshaft. Slowly rotate both tires forward and count the number of turns of the driveshaft. 3 and 3/4 turns is 3.73 4 and almost a quarter is 4.10's.
Yes 1 rev per tire. Works forward or backward, just make sure both wheels turn in the same direction.Y ou can lay under truck, hold one tire with your foot and turn one side then do the same for the other side. So 1 complete revolution for both rear tires and count the turns of the driveshaft.
There might be a tag held on by a cover bolt that will have the info. If going under the truck to check ratio as per Steve's info, please make sure the truck is safely supported. We like to keep our members around for a while.
This is the easiest way I have found with one person. I don't trust tags on that old of truck as someone could have changed the gears.
Jack up one wheel and leave the other on the ground. Then rotate the tire one full turn and count the amount the driveshaft went around. The driveshaft rotation will be HALF of the gear ratio.
So after one rotation of the tire if the driveshaft went around about 1.75 turns you have 3.50 gears, just a hair past 2 rotations you have 4.10s, etc. If stock gears you will likely have one of those two ratios.
Best way is to just take the cove off and check the numbers. This will also give you a chance to put eyes on the hard parts. Never know what you might see that is on the verge of letting go! As you can see in the pic below, someone before me changed the gears and left the old 3.54 tag on the cover. I also found the very end of another tag under the head of a different bolt. The axle tube code said 3.54, the tag said 3.54, actually installed were 4.10.
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
