Powerglide

1.80 Ratio Premium Planetary Assembly Kit
Part No. 28180G-01S

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Sonnax offers complete GM Powerglide planetary assemblies in a variety of gear set options and configurations to ensure you get the performance you want without overpaying or sacrificing quality. Each comes fully assembled and ready to install.

Track-proven to 2,000 horsepower, Sonnax Premium planetaries are an ideal choice when extra durability is needed at a reasonable cost in demanding applications. 1.80 Ratio Premium planetary assembly kit 28180G-01S 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
  • High-strength output shaft resists twisting and breakage
  • Bolt-together carrier for ease of service

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

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

Contender

Track-Proven to 1,500 HP

Premium

Track-Proven to 2,000 HP

Extreme

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
300M
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

  • Carrier Assembly
  • Output Shaft Short Length
  • 1.80 Gear Set 12-Tooth
  • Gear Process Level: Premium
  • Shaft Length Option: Short
  • Shaft Material: HY-Tuf
  • Ratio: 1.80
  • Flange Tooth Count: 12
  • 28180g 01s