Detroit locker identification

Detroit locker identification DEFAULT

Featured Products and Specials

Detroit Locker FAQ’s

What kind of oil should I use? Can I use synthetic? Do I need friction additive/modifier? A quality petroleum/mineral based oil works best in the Detroit Locker units. We do not recommend synthetic oil. Friction additive/modifier is not required.

Can I use the stock bearings? In most cases the Detroit Lockers work with the factory (stock) bearings. The exceptions are: 10 bolt 8.5\8.6 GM axles, the “Performance” Dana 35 & 44 and GM12 bolt with 35 spline axles. No other “special” setup is required.

What kind of break-in is required? The Detroit Lockers do not require any break in.

When does a Detroit Locker lock? The Detroit Locker is locked up 100% in a straight line or if you are spinning. The unit unlocks in a turn for the wheel that is turning the fastest.

When I step on and off the gas pedal, I hear the unit make a “clunking” noise. Why? Because Detroit Lockers have “backlash” or “slack” between the drive and driven teeth and you will hear this in everyday use going through corners and when going from drive mode to coast mode. Also with the vehicle on the ground and the transmission in neutral you will have 1\4 to 1\3rd of a turn of lash in the driveshaft, this is completely normal.

Can I run a Detroit Locker on the street? Many people do use the Detroit Locker during everyday street use. The Detroit Locker is a very aggressive differential, so you will hear it and feel it everyday on the street. Eaton makes many applications for trucks that spend most of their lives on the road. (In the late 60’s, some Ford cars had the Detroit Locker as a factory option.)

How much horsepower and torque will the Detroit Locker take? There are many factors to consider when determining if a specific differential will last in your vehicle. Horsepower and torque are important factors. However, the weight of the car, tire height/width, the terrain and suspension are all important things to take into consideration. For example, a setup that uses street tires will live longer because both tires will break loose and spin before any real strain is put on the unit. But as the tire gets wider, the stress on the unit increases because the traction is greater. When in doubt, the best bet is to call us with your specific application and driving conditions. But also keep in mind that the Detroit Locker is the strongest unit sold today and has been for many years.
Can the Detroit Locker be used in the front axles? Yes they can, but you must have lock out hubs and they MUST be unlocked for on- road driving because of steering issues.

Can the Detroit Locker be repaired? Yes they can. Should you need to repair a Detroit Locker parts can be purchased from any of our dealers. Call Eaton Customer Service so we can provide a blow up of the unit that shows all the part numbers and help you find out exactly what part numbers you need to purchase. At that time we can even recommend a company to buy the parts from.

What is the warranty? The Detroit Locker unit is covered for one year from date of purchase against defects in materials and workmanship. The unit is not covered if the failure of another part (axle shaft or ring & pinion) damages the unit.

Sours: https://www.differentials.com/detroit-locker-faqs/

Dana 44, 3.73 & Down, 30 Spline, Detroit Locker

The legendary Detroit Locker began the revolution in performance differentials and still leads the industry today as an Eaton brand. The Detroit Locker is the most durable and dependable locking differential available.
The Detroit Locker maximizes traction by delivering 100% of the torque to both drive wheels. It is engineered to keep both wheels in a constant drive mode, and has the ability to automatically allow wheel speed differentiation when required. 
No other performance differential has the reputation for delivering traction in mud, snow, rocks and on the track. The choice of professional racers and off-road enthusiasts around the world! The durability of the Detroit Locker is unmatched!

Bolt holes will have to be drilled out to accept larger JK bolts.


Eaton logo

Sours: https://www.revolutiongear.com/product/dana_44_373_down_30_spline_detroit_locker
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Detroit Locker: History, Anatomy & FAQs About the Toughest Differential in Town

Back in the day, if you needed the toughest, most-capable differential on the street, you ran a Detroit Locker.  When you want the same kind of differential today, the choice is still aDetroit Locker. It’s the most durable and dependable locking differential available.

The Detroit Locker is an automatic locking differential that is designed to lock both wheels of the rear axle together when torque is applied. It acts much like a spool that solidly connects both wheels together. In a turn, the unequal speed of the wheels forces the Detroit Locker to disengage. Simple and effective.

The Detroit Locker was initially called a “Thornton NoSPIN Differential.” Ray Thornton patented it in 1941 as device for use in six wheel (tandem drive) truck applications. The NoSPIN was manufactured by the Detroit Automotive Product Corporation and was used on American military vehicles during World War II.

After the war and into the 1960s, the Thornton NoSPIN was original equipment on light and medium duty trucks. That’s right about when it got the Detroit Locker nickname—and when racers and high performance enthusiasts started to take an interest in it. They used the Detroit Locker on everything from road racers to NASCAR roundy-rounders and land speed record cars. In the late 1960s, some Ford performance cars had the Detroit Locker as a factory option. And to no one’s surprise, the Detroit Locker was found in cars at virtually every drag strip in the nation.

A Detroit Locker’s major internal pieces are the side gears, outer springs, driven-clutch assemblies, spider assembly, and center cam. The center cam is held in the spider assembly with a snap ring, but it is free to rotate. The spider assembly takes the place of spider gears found in a conventional open differential.

The key to the unit is the series of teeth found on the spider assembly and the driven clutches on either side of the spider. The driven clutches ride between the side gears, which are splined to fit the axles and turn at the same speed as the axles. When a vehicle is under power and moving forward, both axles are locked in position and turn at the same speed. This means each driven wheel is getting approximately the same amount of traction.

A Detroit Locker will disengage when you take a corner. During a turn, the outside wheel must travel a distance greater than the inside wheel. This causes the wheels to turn at different speeds. The teeth on the Detroit Locker’s spider and driven-clutch assemblies are cut at a negative angle. Here the center cam (inside the spider gear) locks into position and acts as a ramp to disengage the driven-clutch teeth from the spider gear. This allows the outside wheel to rotate faster around the corner. Once the driven-clutch rotation equalizes and both wheels are traveling at the same speed, the exterior springs force the teeth to mesh, or lock. That’s why a Detroit Locker sounds and feels like it’s locking and unlocking when you’re turning.

In the old days, the Detroit Locker got a reputation from clunking and banging as it engaged and disengaged. Nobody cared because that meant you drove a really serious car. Today’s Detroit Locker will certainly let you know when it locks and unlocks, but it’s not quite as severe as the old style differentials.

In 2005, powertrain giant Eaton Corp. purchased Detroit Locker’s parent company and greatly expanded the offerings. Today, you can get a Detroit Locker for Ford 9- and 8.8-inch, Dana 60, Dana 44, Chrysler 8 3/4-inch, and GM 10-bolt and 12-bolt axles at Summit Racing.

Can I use the stock bearings?

In most cases the Detroit Lockers work with the factory (stock) bearings. The exceptions are: 10-bolt 8.5\8.6 GM axles, “Performance” Dana 35 and 44 axles, and GM 12-bolt with 35-spline axles. No other special setup is required.

When I step on and off the gas pedal, I hear the unit make a “clunking” noise. Why?

Because Detroit Lockers have backlash or “slack” between the drive and driven teeth, you will hear noise in everyday use when you take corners and go from drive mode to coast mode. With the vehicle on the ground and the transmission in neutral, you will have one-quarter to one-third of a turn of lash in the driveshaft. This is completely normal.

How much horsepower and torque will the Detroit Locker take?

There are many factors to consider when determining if a specific differential is right for your vehicle. Horsepower and torque are important factors. However, the weight of the car, tire height/width, the terrain and suspension are all important. For example, a setup that uses street tires will live longer because both tires will break loose and spin before any real strain is put on the unit. But as the tire gets wider, the stress on the unit increases because the traction is greater. But keep in mind that the Detroit Locker is the strongest unit sold today and has been for many years.

Can the Detroit Locker be used in front axles?

Yes it can, but you must have lock-out hubs and they MUST be unlocked for on-road driving so you can steer the vehicle.

Tags: Detroit Locker, differentials, Eaton Corp

Author: Wayne Scraba Wayne Scraba is a diehard car guy and regular contributor to OnAllCylinders. He’s owned his own speed shop, built race cars, street rods, and custom motorcycles, and restored muscle cars. He’s authored five how-to books and written over 4,500 tech articles that have appeared in sixty different high performance automotive, motorcycle and aviation magazines worldwide.

Sours: https://www.onallcylinders.com/2013/12/19/detroit-locker-history-anatomy-faqs-toughest-differential-town/
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