1991 Chevrolet 2500 Pickup Q&A

1991 Chevrolet 2500 Pickup Question: RING & PINON

MY RING AND PINON IS BAD i TRY TO GET ONE FROM DIFFERENT PLACES BUT THEY ARE ASKING ME FOR A NUMBER THAT IS LOCATE IN THE DIFFERENTIAL AND I CANT FIN IT CAN SOME ONE HELP ME PLEASE. -
Answer 1
There's a little metal tag located on one of the rearend bolts usually on the rear cover, it tells what gear ratio the rear end is ( 355 or 373 or 411 ) If your truck is a 4 X 4 there will be a tag on the front also in the same location. -
Answer 2
there is also inprinted on the ring gear if you spinn it there will be the same numbers on the ring as the tag from the factory -
Comment 1
you can also count the gears on the pinion and the ring to get the ratio -