View 0 Photos View 0 Videos 1992 Fuller RTX12609B Transmission for a Peterbilt 377 $1,150 USD (USED) Fuller RTX12609B Assembly#: 0530025507 Input Lgth: 10.5" Input Dia: 2.0 Pilot Dia: 1.18 ConditionUsedAssembly Number0530025507Fits To Make(s)PeterbiltFits To Model(s)377Stock Number26001251 MLS Number14387271CategoryTransmissions Last Updated5/24/2026 LocationDes Moines, IA, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info