How do you find the gear ratio from a tag?
So an easy way to determine your actual gear ratio is to check the tag attached to the differential cover by the cover bolts. On the tag there should be some numbering such as 3.54 or 3.73, either of those numbers will give you the stock axle ratio.
Does VIN number tell gear ratio?
Identify the VDS section, the fourth through eighth digits of the VIN. This section typically includes information such as the vehicle model, engine size and body type. While not every vehicle manufacturer includes gearbox ratio information in the VDS, this will be where the information is found if it was included.
How do I identify my GM rear end?
Identify your GMC or Chevrolet rear end gear ratio by the RPO Codes, usually located on the placard labeled “Service Parts Identification” inside the drivers door panel or glove box.
Where do I find my rear end gear ratio?
You can typically find your RPO code on driver side door panel or glove box. General Motors rear end differentials are referred to by the diameter of the ring gear, i.e. 7.5 inch, 8.5 inch, 10.5 inch. Our experts will help you find the correct ring and pinion set for your particular application. Give us a call at 800-216-1632 to get started.
When do you need to know the gear ratio on an F-150?
Over the years, the F-150 came with an assortment of rear ends and gear ratios depending on engine size and options. Knowing the gear ratio of your F-150 is important if you have to replace the ring and pinion gears due to breakage, or if you want to change gear ratios.
What does it mean when gear ratio is greater than 1?
It refers to the rotational speed of the engine when it is divided by a gear ratio greater than 1:1. To arrive at a gear ratio greater than 1:1, interlock a smaller gear with a fewer number of teeth (reduced size) with a larger gear with a higher number of teeth.
What is the RPO code for a rear axle?
GM RPO Axle Code List (H) RPO Axle Type Ratio H01 Rear Axle 3.07 H04 Rear Axle 4.11 H05 Rear Axle 3.73 H12 Rear Axle (Eaton 21065S) —