4T60E, 4T65E Automatic Transmission Differential Ring Gear (78 Left Fine Pitch Teeth, 2.86/3.05/3.29 Ratio, Good Used) | Fits 1996-1999 Buick Automatic Transmission Differential Ring Gear (78 Left Fine Pitch Teeth, Mates With U84559B & D84559B Forward Drum, 2.86/3.05/3.29 Ratio, Good Used) (24200334). 1996-1999 4T60-E1997-1999... Part #: U84598D MSRP: Was: Now: $32.99 Decrease Quantity: Increase Quantity: Add to Cart