How can I tell what gears are in my rear end?

How can I tell what gears are in my rear end?

Turn the wheel TWO revolutions and count the number of driveshaft turns. The number of driveshaft rotations will help you determine your rear axle ratio. For example, if it turned 3 and a half times, it’s a 3.50:1 ratio. If it turned 4 and a quarter times, it’s a 4.25:1 ratio.

What’s the difference between 4.10 and 3.73 gears?

4.10s are going to accelerate faster and decelerate faster on lift. However the trade off is greater fuel consumption per mile driven and higher engine speed per given road speed. In basic terms the 4.10s will feel quicker and 3.73 will feel faster.

Is a 3 42 gear ratio good for towing?

Re: Towing weight for a 5.3 with 3:42 gears IMO, yes you can tow that trailer. I pulled an 7K trailer w/ my Sierra w/ 5.3 & 3:42. It may struggle a little going up some hills.

Can you change the gear ratio on a truck?

You can change the axle ratio, and you can do it rather easily. Quite a few members here have gone from one ratio to the next. People with 3.21 and 3.55s are going up to 3.92 and even sometimes 4.10. A lot of the 4×4 trucks you see here with lifts and larger tires have gone with 4.10 or 4.56.

Is a 3.08 gear good for towing?

Yes, you are exactly right, towing with a 6 speed with 3.08s is still better than towing with a 4 speed and 3.73s. If its a heavy trailer, you will probably never use 5th and 6th gears, but who cares? crank turns to rotate the rear wheels once that counts.

How do you tell if you have a 7.5 or 8.5 rear end?

Another way to tell the difference between an 8.2 and an 8.5 rearend is to pull the cover and look at the bolt holding the spider gear crosspin. If it takes a 1/2-inch wrench to remove it, it’s an 8.2. If it takes a 5/16-inch wrench to remove it, it’s an 8.5.

How much HP can a 10 bolt rear end handle?

Here’s what I’ve been lead to believe: 7.5” 10 bolt GM rear: It will take up to about 450 HP IF the axle tubes are welded to the housing and either a differential cover with preload bolts is installed or straps are installed over the carrier bearing caps along with longer bolts.

How much horsepower can a GM 7.5/10 bolt handle?

A stock WS6 puts out 345 ft lbs of torque (And a theoretically under rated 320hp). That’s about all the 10 bolt can *reliably* handle with the stock tires and a stick shift.

Is a 10 bolt rear end good?

Even though it has been used in every major GM rear-wheel-drive platform, the 10-bolt has a bad reputation for being a low-performance unit. Nothing could be further from the truth. The 10-bolt can handle just about anything you throw at it, as long as you use the right axle, either the 8.5- or 8.6-inch.

How much HP can a 12 bolt rear end handle?

The 12 bolt is usually good to around 600 HP. You should be fine with it at 500 HP and the automatic.

What is the best rear end for drag racing?

Ford 9″

Whats the difference between a 10 bolt and 12 bolt rear end?

First, the 10-bolt’s pinion shaft diameter is 1.438 (25 splines) while the 12-bolt is 1.625 (30 splines) which makes the 12-bolt 13 percent larger in diameter and therefore stronger. The 8.2 uses a 28-spline axle (1.20 inches in diameter) while the 12-bolt uses a 30-spline axle (1.625 inches in diameter).

How do I know if my 12-bolt is posi?

there should be numbers on the axle and the cover. you could run them and it should tell you what you have if everything is stock. Turn one axle, if the other one turns the same way its a posi, if it goes the other way its not.

How much horsepower can a GM 8.5/10 bolt handle?

It all depends on your goals and how much you want to spend. A stock 8.5″ 10 bolt with posi (posi doesn’t make it any stronger, but will help with traction) should live just fine behind 450+ HP depending on if you run slicks or not. 1970 Camaro 385ci 11.90’s on street tires, pump gas, no nitrous, no trailer.