Floor it. If both tires burn rubber or turf grass you have locking rear. Lift both rear tires off the ground with your transmission in neutral turn one wheel in a forward direction, if the other goes in the same direction you have a locking differential, if it turns in the opposite direction you don't.
To take care of unequal torque power distribution, the selectable (manual) and automatic locking rear differentials were developed. The wheels of a car fitted with a locking differential will have the same rotational speed as they are interlinked or locked in relative motion to each other. Regardless of the traction (friction) experienced by a wheel, the rotational speed is maintained and to be the same for both. Locking rear differential offers better traction for wheels compared to the open one.
want to know what rear end it has for a replacement
The locking differential came on some of them. To determine if a particular Blazer has a locking differential you need to look for code "G80" on the RPO list. The RPO list is on a sticker in the glove compartment.
Differential lock is a driver controlled locking mechanism which locks the speed differentiation of axle halfshafts in differential mechanisms.After locking, both wheels rotate in same speed.But the interaxle differential(IAD) lockstopsthe speed differentiation of two axles in Tandem axle vehicles by locking the inter axle differential(third differential),after locking IAD both pinions rotate in same speed.
Some years may have, the question needs to be more specific. Neither my 1994, nor my 2002 dakotas had it.
no your axle is locked to your hub. You will need something in the chunk to turn your axle like a locking differential of some sort.
Differential, with 10.25 ring gear Rear..........7.4 pints Differential, with 8.8 or 9 ring gear Rear..........5.5 pints Differential, Dana 70 HD Rear..........7.4 pints Differential, Dana 60, 61 Rear..........5.9 pints Differential, Dana 70 EX HD Rear..........6.5 pints Differential, Dana 80 Rear..........8.4 pints This link should help if you Identify which you have if you don't already know. http://www.drivetrain.com/rearend.html Hope This Helps.
The SE-5 package has a limited slip differential but it doesn't fully lock.
The flashing light is letting you know your differential is locked in for more traction
85W90 gear oil and add a bottle of positive trac. lube also.
i also would like to know since my 1966 nova differential busted :(
Jack up the front of the car, put in nuetral, and spin one wheel. If the opposite wheel spins the same way, you have locking differential.