Great upgrade for the TH400 and 4L80E that still has the weaker 17 element sprag. Genuine Borg Warner part.
GM, Transmission
34 Element Sprag for TH400 and 4L80E Transmissions – GM 8633173 / 34418X
$71.99
Availability: In stock
SKU: 8633173
Categories: GM, Transmission