It's not. Call a GM dealership, tell them your VIN #, and they can tell you the gear ratio it came with from factory.
It will, but you want to make sure it's the same gear ratio, which would be determined by the RPO codes on the glove compartment door.
The maximum speed for a Dodge truck would be between 100 and 120. I would not try and go that speed.
It would depend on the differential gear ratio and engine horse power/torque.
If you are trying to identify the axle ratio and/or if it has a locking rear differential and you have access to the original truck, there is a build sheet summary usually in the form of a decal. This decal would be located on the inside of the glove box lid.
On that type of differential with that year truck, your best option would be find good used third member simply because differential work usually means special tools. Also make sure you have the same gear ratio if you find a used differential.
Differential gears don't measure anything. When you talk about "gear ratio", you are talking about the gears (ring and pinion), in the rear end. A 4.11 gear ratio for example, allow the engine to turn 4.11 times for every one revolution of the vehicle rear end. Other ratios could be 3.07, 3.50, 3.70 and etc.Differential gears on the other hand, are the gears in the differential case (located next to the ring gear), that allow a truck or car to turn a corner. They are a set of 4 gears that allow the axles to rotate independently in the rear end when turning. They also allow the axle to pull equally on the straight road.In common language, the term "Differential" is usually used in reference to the "Rear End", which is actually incorrect. IE "I have a 4.11 differential ratio in my truck".The proper statement would be "I have a 4.11 rear end ratio in my truck".
Why would you need to? The rear differential will be the same, only the transfer case will be different. :)
You may need differential fluid...check that.
automatic transmission would have a 3.23 axle ratio.manual transmission would have a 3.42 axle ratio.
gear ratio
It would depend on the engine, transmission and rear differential ratio it has, need more info.
130-150mph? It would depend on how it is equipped with engine, transmission and differential gear ratio.