May 09, 2017

Level Up with Sonnax: 5 Key Powerglide Transmission Areas to Upgrade for Optimum Performance

The options for taking a Powerglide transmission to the next tier of performance can be overwhelming for the average builder. The charts below identify the five major part groups for which Sonnax offers upgrade options. Strong, durable components for every build level guarantee racers never underspec or overpay for unmatched transmission performance.

Input Shaft & Stator

The input shaft area is one of the most highly stressed parts of the transmission. Delivering modern power levels through the transmission is no easy task. Having the right shaft and stator support for your power level is the key to avoiding spline twist and shaft breakage at the track.


A servo that applies and releases as expected is the key to a reliable transmission. Old-school servos fall far short leading to frustrating problems like band failures, broken shafts and staging issues. Complete servo kits from Sonnax use innovative engineering to solve these long-standing problems.


Mixing parts from various sources can lead to hidden apply problems. A Sonnax drum kit is the best way to make sure the drum, piston and hub work together for trouble-free operation.

Planetary & Output Shaft

Stock planetary gears are time bombs waiting to fail in a racing transmission. When picking a replacement, “one size fits all” is a recipe for disappointment. With four ratios plus Premium and Extreme performance options, Sonnax planetary assembly kits are the #1 choice for outstanding performance and reliability at any power level. Each kit includes a custom, high-strength output shaft designed to prevent twisting and breakage.

Slip Yoke

Once the internals are upgraded to handle big power, don’t let an OE-style slip yoke be the weak link. An upgraded yoke engineered to handle increased power and torque is the best way to avoid a twisted yoke or an outright driveshaft failure. Sonnax slip yokes deliver track-proven performance and are available for 27- or 32-spline output shafts with bushing or bearing support.

Custom Build Examples

The three builds shown here are EXAMPLES ONLY. Sonnax offers multiple options in each part category so that you can tailor builds to your needs.

Click here to view all available Powerglide parts.

Improved Durability for Budget BuildsImproved Durability,
Reasonable Cost
Max Durability,
Cost is a Secondary Concern
UsageQuarter MileQuarter/Eighth Mile,
Quarter/Eighth Mile,
Mud, Monster
PowerUp to 1,500 HPUp to 2,000 HPUp to 3,000 HP
Input Shaft & StatorStator Support Tube
28154S Use with 1" Input Shaft
Ringless Stator Tube Kit
28154S-07K Use with 1" Input Shaft
1-1/8" Big Input Shaft Kit
Big Input Shaft Stator Tube
ServoRace-Calibrated Servo Return Spring Kit
Servo Piston & Cover Kit
Supported Servo Master Kit
Smart-Tech® Ratio-Style Servo Kit
Drum10-Clutch Drum, Hub & Piston Kit
Friction (Red)
10-Clutch Drum Kit
Friction (Red)
Smart-Tech® 10-Clutch Drum Kit
Friction (High Energy)
Planetary & Output Shaft1.80 Premium Planetary Assembly Kit
1.69 Premium Planetary Assembly Kit
1.58 Extreme Planetary
Assembly Kit
27-Spline, Long Extreme Stength Output Shaft
Ring Gear Stabilizer Kit
Slip Yoke27-Spline, Bushing-Style Slip Yoke
27-Spline, Roller Bearing-Style Slip Yoke
32-Spline, Roller Bearing-Style Slip Yoke

More Critical Sonnax Components to Extend Durability

You’ve got the big upgrades specced out, now it’s time to ensure other key components are in top shape to help the transmission run efficiently all season long. These Sonnax performance parts are highly recommended in every Powerglide build.

Part NamePart No.Details
Pump Bushing34034T-01Drop-in replacement, precision, PTFE-lined
Filter Extension Kit[28801-S09K]For 28801-S, standard Powerglide filter & valve body. Chrysler filter to Hipster kit also available
Band Adjustment Screw Kit28612-01KIncludes jam nut
Shift Lever Kit28431-05KBolt-together, anti-leak kit works with all common competition shifters. One-piece kit also available.
Output Shaft Support Kit28080KHigh-strength billet aluminum, includes roller bearing
High Clutch Drum Small Parts Kit28755-SPKSpring retainer, springs, retaining rings, wear plates, lip seals & PTFE bushing
High Clutch SteelS019701AK12-Tooth, .060" thick, without turbulator holes, Kolene® material. Other options available.
Extra Wide BandS019961Red material, Kevlar® lining also available
Heavy Duty Reverse Clutch Return Spring28320A17/Bag
Heavy Duty Reverse Clutch Spring Retainer28709No-flex design

Related Units

Related Parts

While Sonnax makes every effort to ensure the accuracy of technical articles at time of publication, we assume no liability for inaccuracies or for information which may become outdated or obsolete over time.