Powerglide

1.80 Ratio Contender Gear Set
Part No. 180S-1K

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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 1,500 horsepower, Sonnax Contender gears are an affordable choice for high-quality builds on a budget. 1.80 Ratio Contender gear set 180S-1K features premium-processed sun and pinion gears that are a big step up from standard case-hardened and tempered varieties. High-quality materials combined with a special heat-treating process results in incredibly tough, wear-resistant gears.

  • High-quality sun and pinion gears deliver enhanced durability
  • 12-Tooth billet drum flange is broached and matched to the sun gear for a precise press fit, no welding required

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

  • Short Pinion Gears (3)
  • Long Pinion Gears (3)
  • Front Sun Gear
  • Drum Flange 12-Tooth
  • Rear Sun Gear
  • Ring Gear
  • Gear Process Level: Contender
  • Ratio: 1.80
  • Flange Tooth Count: 12
  • Powerglide 1.80 Ratio Contender Gear Set 180S-1K

I run a Sonnax 1.80 straight cut gear set and have had no problems or issues, plan on purchasing another real soon for another car we are putting together. Thanks Sonnax for the reliability and durability in your product.

R. Merrill Affordable Transmission Brooklyn Park, MN