1.80 Ratio Premium Gear Set
Part No. 180S-24K

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Sonnax offers complete GM Powerglide planetary gear sets in a variety of gear set options and configurations to ensure you get the performance you want without overpaying or sacrificing quality.

Track-proven to 2,000 horsepower, Sonnax Premium gears are an ideal choice when extra durability is needed at a reasonable cost in demanding applications. 1.80 Ratio Premium gear set 180S-24K features premium-processed sun and pinion gears that are a big step up from standard case-hardened and tempered varieties. A top-quality material combined with a special heat-treating process results in gears with improved grain structure and stability that are tougher and more wear resistant.

  • Top-quality sun and pinion gears deliver outstanding durability
  • 24-Tooth billet drum flange is broached and matched to the sun gear for a precise press fit, no welding required
  • Flange is designed to work exclusively with Sonnax clutch drums

See chart and specs below to determine if this planetary assembly suits your application, or dial in options here to choose your build.


Track-Proven to 1,500 HP


Track-Proven to 2,000 HP


Track-Proven to 3,000 HP

Sonnax Warranty 1 Year (Gears Only) 2 Years (Gears Only) 2 Years (Gears & Shaft)
Gear Material 9310 Suns
8620 Pinions
9310 Suns
9310 Pinions
9310 Suns
9310 Pinions
Gear Process Premium Premium
Advanced (Learn More)
Shaft Material Long Shaft = 4340
Short Shaft = HY-Tuf
Long Shaft = 4340
Short Shaft = HY-Tuf
Shaft Splines Cut Spline Cut Spline Rolled Spline
Thrust Washers OE Steel-Backed PTFE Steel-Backed PTFE
Ring Gear Standard Standard Maximum Duty

Applies to planetary assembly kits only

  • Short Pinion Gears (3)
  • Long Pinion Gears (3)
  • Front Sun Gear
  • Drum Flange 24-Tooth
  • Rear Sun Gear
  • Ring Gear
  • Gear Process Level: Premium
  • Ratio: 1.80
  • Flange Tooth Count: 24
  • Powerglide 1.80 Ratio Premium Gear Set 180S-24K

My Sonnax-equipped Powerglide transmission performed flawlessly through the ultimate torture test: HOT Rod magazine DRAG WEEK. The car went over 1,000 miles, pulling a TRAILER full of tools, parts, and equipment, PLUS racing five days in a row. The transmission was EASILY the strongest link in the chain!

D. Diesner Libertyville, IL