• 1-2 Flare
  • 1-2 Bind-up


Worn low/reverse sprag assembly components.


Save the race and install Sonnax low/reverse sprag rebuild kit.


Low/Reverse Sprag Rebuild Kit
Part No. 104642-90SK

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In GM 6L90 transmissions, the low/reverse sprag elements, end caps and retainer plates are prone to wear, while the race is often unaffected. This results in a bind-up going into 2nd Gear or a 1-2 flare. Sonnax low/reverse sprag rebuild kit 104642-90SK allows replacement of the caps, elements and retainer plate without the expense of buying a full sprag assembly.

  • Sprag Clutch Element Without Race
  • End Caps (2)
  • Retainer Plate
  • Snap Ring
  • 6L90 Low/Reverse Sprag Rebuild Kit 104642-90SK