Does anyone know if the brass washer between the spider gear and the carrier on a 12 bolt is available? I know you can buy a complete internal kit but I really only need the washer. Thanks Wes

You can still get these wear plates thru GM but dont know if they are still listed as copper. They prolly have them in differant thickness also and or they will come in a package of preselected thickness.. for various wear patterns. You asked for spider gears and I presume you are talking about the small ones? Those are spiders,, the axle gears are the larger ones.

I just purchased the thrust washers from GM about 6 weeks ago. Here is a link to the thread I started, which includes the part numbers for the thrust washers and tips on how to install them. You may also want to consider replacing you axle bearings/seals while you at it. PM me if you have any other questions.

http://www.camaros.net/forums/showthread.php?t=56131&highlight=spider

The brass washers have been replaced by stronger steel washers. The GM part number is 3957940. They come 5 to a pack. I don't know why. Maybe your dealer will sell you 2 of them.

Thanks for the part number guys. I am putting all new bearings and seals in my differential and for some reason one of these was missing.

Check the case behind the gear. If the thrust washer has been missing for a while then the case might be worn.