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- Automatic Transmission Accumulator Pistons (2) The options in this area are not available since you have already selected choices in the area. Use the "Get Results" button for your current choices.
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Sonnax Transmission Company Parts and Accessories

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Summit Bucks

Sonnax Pinless Accumulator Piston Kits

Wear at the piston pin bore surface can result in poor shift quality and burnt clutches and bands. Sonnax pinless accumulator piston kits prevent pin bore leakage. They're also longer to stabilize the piston and prevent piston cocking. They feature dual seals to stabilize and completely seal the bore, and steel balls to plug the existing pin bore. Fluid loss through the piston pin bore will no longer be an issue when you invest in Sonnax piston kits.

5.0 out of 5 stars ( 18 )

$8.94

Summit Bucks

Sonnax Accumulator Pistons

Noticing some forward slip and/or delayed engagement with your GM automatic transmission? Sonnax accumulator pistons are direct replacements for OE plastic pistons and restore sealing integrity at the pin bore. The aforementioned issues, as well as burnt clutches and bands can be caused by loss of fluid. Deterioration at older aluminum piston pin bores due to repeated reciprocation and/or cracks in plastic accumulator pistons may be the cause. Avoid a costly valve body replacement by ordering a Sonnax accumulator piston.

5.0 out of 5 stars ( 2 )

$7.91

Summit Bucks

Sonnax Return Springs

Sonnax return springs are available in a variety of styles to assist in your automatic transmission rebuild. Replacement part types include high clutch return springs, pump slide springs, detent springs, reverse clutch return springs, and more. They're machined from quality materials for long-lasting performance, and can be ordered individually or in larger quantities. Select the springs required for your specific transmission application.

4.0 out of 5 stars ( 4 )

$7.98

Summit Bucks

Sonnax O-ringed End Plug Kits

Stop leaks while reviving line pressure and torque converter clutch (TCC) operation by installing Sonnax O-ringed end plug kits. OE end plugs prevent critical pressure loss by capping the bore while also functioning as a valve stop. Trust the Sonnax O-ringed end plug kits designed for your application to help you cross the finish line!

Not Yet Reviewed

$9.92

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