Do you still have the glove box label that shows all the install codes listed? Look in there and the factory installed gear ratio code will be listed. The break down of the gear ratios is listed here somewhere.
Do you still have the glove box label that shows all the install codes listed? Look in there and the factory installed gear ratio code will be listed. The break down of the gear ratios is listed here somewhere.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709