H9 Axle Code
My I.D. label on the driver's door indicates an axle code of H9 for my truck. Couple of questions....
1. What size does this mean I have, or can you tell me where I can look to find out?
2. Does this code mean I have the trak-lock axle?
Thanks for the help....am planning to change out the differential fluid and wanted to know this before I proceed. Additionally, when I buy differential fluid....I know I have to buy synthetic. Is the XL-3 modifier neccessary, or do certain brands / types of fluid suffice without adding the modifier?