Great upgrade for the TH400 and 4L80E that still has the weaker 17 element sprag. Genuine Borg Warner part.
“Sonnax 4L80E Line Pressure Booster Kit Part No. 4L80E-LB1” has been added to your cart. View cart
GM, Transmission
34 Element Sprag for TH400 and 4L80E Transmissions – GM 8633173 / 34418X
$71.99
Availability: In stock
SKU: 8633173
Categories: GM, Transmission
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