#8748, "RE: Help needed - Differential bolt size" In response to In response to 0 Mar-30-11 09:46 PM by dougie2
They are flanged 10mm x 1.0, partially threaded, grade 12.9 bolts.
Try going directly to a Dodge/Chrysler parts counter and tell them it's for a Dodge Neon.
If you have the bolts that originally came out, and they are not damaged, then just re-use them. Everyone online will preach to replace them, but it's not necessary if they are in good shape.