Stellar Automotive Group TH400/4L80E Heavy Duty 34-Element Intermediate Sprag – Compatible for GM 1964-Up

Stop blowing up your TH400 or 4L80E with this bulletproof 34-element heavy-duty intermediate (forward) sprag from Stellar Automotive Group.

The factory 16-element sprag is the #1 failure point in any built or high-torque TH400/4L80E — it rolls over, grenades the forward clutch, and leaves you stranded. This upgraded 34-element version doubles the holding capacity, eliminates rollover, and delivers rock-solid 1-2 upshifts even behind 1000+ hp big blocks, stroked LS engines, or heavy diesel tow rigs.

Perfect upgrade for:

• Chevrolet/GMC C10, Silverado, Suburban, Camaro, Corvette
• High-horsepower street/strip cars
• Heavy towing & off-road trucks with 4L80E/4L85E

Symptoms of a failing stock sprag:

• No 2nd gear or delayed/harsh 1-2 shift
• Forward clutch burnout on teardown
• Ratcheting noise under acceleration

Drop this HD sprag in during your next rebuild and never worry about the intermediate again.

Note: Turbo 400’s came with 2 different direct drums from the factory, this sprag will only fit “smooth cam” direct drums. Please verify this will fit the drum from your transmission. If you are unsure please contact us before purchase.

All parts are distributed, not designed or manufactured, by Stellar Automotive Group.

Add the toughest TH400/4L80E sprag on the market to your cart today and build it to survive!