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Faster tougher stronger

Powerglide Planetary Assemblies

Optimized Performance Guarantees You Never Overpay or Underspec

Available fully assembled in four ratios and three performance levels, Sonnax planetary assemblies are the #1 choice of racers that demand outstanding performance and reliability.

Sonnax gear sets are a big step up from standard case-hardened and tempered varieties. High-quality materials combined with an advanced heat-treating process results in incredibly tough, wear-resistant gears.


Build the PERFECT Powerglide

Sonnax makes it easy to dial in options and select the perfect Powerglide planetary assembly or gear set.


Contender—GOOD

Affordable Upgrade for Budget Builds

Premium—BETTER

Extra Durability for Demanding Applications

Extreme—Best

Highest Quality Planetary Assemblies in the World

From carrier and output shaft to gears and thrust washers, every Extreme assembly component is refined for maximum durability. The ring gears are even pre-drilled for the Sonnax stabilizer system to prevent vibration and broken Reverse friction plates.

Extreme Gears for Extreme Performance

To greatly improve the life of Extreme gear sets, the sun and pinion gear undergo the same advanced processing as assemblies developed for Formula 1, NASCAR® and other high-end professional racing circuits:

Advanced Process gears undergo a three-step process that takes aftermarket performance gear manufacturing to a whole new level:

  • Cryogenic tempering for an even denser, more uniform gear with a tough and wear-resistant structure.
  • Shot peening increases gear resistance to fatigue failure, cracking or galling.
  • Super-finish reduces friction, vibration, noise and wear on the gear, potentially tripling the life of the part.
  • Coated sun gears for improved scuff resistance.
Shaft group

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

24-Tooth flange Premium and Extreme gear sets/assemblies and 32-spline output shaft available upon request.

Big Shaft System

Go BIGGER with Sonnax 1.58 & 1.65 Ratios

Stop worrying about input shaft failure when running the Powerglide in the most extreme applications. Sonnax offers the only big input shaft upgrade with custom components designed to work together for reliable performance.

Learn how to level up an existing 1.58/1.65 assembly or start from scratch in the gear ratio of your choice.

Big shaft assembled
158 gear set

1.58 Ratio - Join the Powerglide Revolution

Control You Can Count On – Even at Extreme Horsepower

The Sonnax 1.58 delivers tunable control for Powerglides right at the start, when traction can make or break a race. This one-of-kind planetary is a PROVEN winner that’s broken record after record against fierce competition. Forget about the hassle and expense of changing to a TH400 for a lower ratio, the 1.58 in an efficient, lightweight Powerglide delivers the very best in performance and durability.

  • Push the limits while going faster than ever
  • Unrivaled quality & durability
  • Fully assembly & easy to install
  • Compatible with the Sonnax big shaft system

Use the Choose Your Build table to select the right assembly.

Watch one racer’s world record-breaking runs with the 1.58 on YouTube

Sonnax high performance products meet the toughest challenges faced by hard-working, daily-use drivetrains as well as racing units going all-out on the street or track.

Learn About Sonnax Heavy Duty & High Performance See All Heavy Duty & High Performance Upgrades