Best Answer

Several ways: 1) put one rear tire on a jackstand and see if the vehicle will drive off the stand - if so it's locking/limited slip. If not - open. 2) Lift the entire rear end up and w/the tranny in neutral spin one tire by hand. If the other spins the same direction it's a locking diff - if it spins the opposite direction - open diff. 3) Put one rear tire on grass and the other on pavement and floor it. If the one in the grass does all the spinning and you barely move - open. If you put rubber on the pavement - locking. 4) VIN Code will tell you.

More comments: The locking rear axle on the later model Safari/Astro is a "fly weight" locker that works like an open axle until it senses too much speed difference between the two rear wheels. When that happens, there is a fly weight that is thrown outward to lock the rear axles. So, Item #2 above, won't work on this axle if you turn a wheel by hand since you can't get enough speed difference (unless you are Superman). Items #1&3 will work OK, just be careful. Regarding Item #4, the VIN won't tell you about the axle. The easiest way to determine if van has a locker is to look on the RPO code placard on the edge of the passenger front door. If it has "G80" listed, then the van has a locking differential. If no G80 listed, then it is an open axle. By the way, if it has "GU6" listed, the van has a 3.42:1 axle ratio. If it has "GT4" listed, the van has a 3.73:1 axle ratio.

Jack up the rear of the van. Place the gear selector in neutral. Rotate the rear tire by hand. If the opposite tire revolves in the same direction then it is posi. If the opposite tire revolves in the opposite direction then it is not posi.

User Avatar

Wiki User

โˆ™ 2015-07-15 19:02:24
This answer is:
User Avatar
Study guides

Add your answer:

Earn +20 pts
Q: How do you know if a GMC Safari has a Locking Rear Axle?
Write your answer...
Still have questions?
magnify glass
Related questions

How can you find the gear ratio of a 1988 G20 three quarter ton 5.7?

Check the SPID in your glove box. one of the G** Codes will be the rearend ratio G80 means you have a locking(posi) Rearend. GU2 AXLE REAR , 2.73 RATIO GU4 AXLE REAR , 3.08 RATIO GU5 AXLE REAR , 3.23 RATIO GU6 AXLE REAR , 3.42 RATIO GU7 AXLE REAR , 2.77 RATIO GU8 AXLE REAR , 3.90 RATIO GT2 AXLE REAR , 4.77 RATIO GT3 AXLE REAR , 4.55 RATIO GT4 AXLE REAR , 3.73 RATIO GT5 AXLE REAR , 4.10 RATIO Anything else, let me know, I'll look it up. (cortex454 at gmail dot com

What are the signs of a bad axle on a car?

Need to know year, make , model, front axle or rear axle to help you.

How do you know if rear axel is worn on 98 blazer?

If you have up and down movement with the rear axle at the bearing, chances are the axle is also worn.

Do all rear brakes of Chevy Tracker lockup?

my 2002 never has ...I know there is a "height sensor-proportioning valve" located above the rear axle which should prevent the rear brakes from locking... when you brake the weight of your Tracker goes forward and the rear actually lifts... this device lessens the pressure to the rear brakes momentarily so they don't lock...

How do you know if you have a Locking Rear Differential?

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.

Rear axle on a 2004 Nissan Titan pick up truck?

I've been looking for a rear axle for an 04 Titan as well. However, our 04 Titan had a recall and was replaced with a 2005 Titan rear axle. Unless you know a friend in the auto industry a rear axle is going to cost you over $1000. Check out They actually have some good deals for the rear axle. We called Nissan dealership and a brand new one would cost at least $1200 or more. Channary

What causes grinding noises on rear axle of 1997 dodge 1500 5.2 v8?

An internal failure in the axle. It will need disassembled to know the actual cause.

Rear axle fluid capacity on a 97 Chevy 1500?

don,t know 1 quart

There is a hose on the rear axle that has came off and you dont know where it goes to Is a vent hose or vacuum line or what 1999 Dodge Ram 2w-drive?

The rear axle has avent hose on the left side. The hose goes on the stud that holds the brake line block the the axle tube.

How can you know if your 2003 CR-V LX is AWD?

Look underneath the rear fo the vehicle. If you see a driveshaft extending back from the area of the engine to a rear axle and differential housing for the rear wheels, you can be sure that it is an AWD model. 2WD models will lack the driveshaft, the axle, and the differential housing.

How do you know what type of rear end is in a 2004 Dodge Ram 1500 2 wheel drive?

You can look on the rear axle carrier housing at the metal tag to know what type of rear end is in a 2004 Ram 1500, two-wheel drive.

Rear axle casting number 9779822 what does it go to?

I know that this rear is a gm standard 10 bolt, and Pontiac used it in the 64-66 gto, tempest, and le mans.

People also asked