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You have a seal leak. The culprit is a cracked OE manual shaft bushing that allows moisture and dirt ingress from the top of the transmission case. The solution is to save the shaft and install a Sonnax shift shaft saver kit. Sonnax's patent-pending shift shaft saver kits replace the OE bushing--without removing and re-welding the shift lever. Since the Sonnax bushing is made from upgraded material, you can be confident of a solid repair, with no risk of comeback. Shift shaft saver kit contents: * Bushing--Delrin® won't absorb atmospheric moisture * Sleeve PTFE * Two O-rings (one extra) * Two retaining clips (one extra)
Not Yet Reviewed
$30.51
Transmission cases made in 1994 and 1995 have neutral safety switch mounting holes, but do not have the top mount shifter bracket holes. That's where these Sonnax shift cable mount brackets come into play, by allowing installation of the 1994 and 1995 transmissions or cases into 1996–97 vehicles that originally had case mounted shifter brackets. Additionally, if a late case has become damaged or has broken top mount bosses, these Sonnax shift cable mounting brackets can be used as an alternative to allow you to correctly mount the shifter cable and allow the reuse of the case.
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$18.99
Sonnax reverse clutch pack pressure plates are service parts needed to finish the assembly of your clutch pack. Top your Powerglide steels and frictions with quality Sonnax pressure plates.
Not Yet Reviewed
$41.37
The small OE spring steel retainers used to hold the heavy solenoids in the valve body are prone to collapse, allowing the solenoids to wobble in the bore and preventing them from properly controlling the shift processes. Collapsed spring retainers also allow the solenoid to damage the casting at opening of the clutch valve bores. Securely hold the solenoid in place with Sonnax solenoid stabilization retainers. An improved Sonnax design adds 32 percent more surface area to contact the casting/solenoid interface for better support and leverage. Also, the tops of the retainers are rolled over creating a positive stop for the flexible side to land against, furthering the prevention of retainer collapse.
Not Yet Reviewed
$6.99
Sonnax premium planetary assemblies are available in various configurations to meet different build requirements. The output shaft is available in the OEM length or short length, and the billet-machined drum flange in 12-tooth or 24-tooth. They are a big step up from standard case-hardened and tempered gears. Sonnax's top-quality racing gear material (SAE9310), combined with a freeze-tempering process (-150 degrees F), results in gears with improved grain structure and stability--tougher and more resistant to wear. Sonnax premium planetary sets are fully assembled and ready to install.
Not Yet Reviewed
$669.08
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$1,205.99
Main shaft failure is a common problem in extreme duty GM TH400, 4L80-E and 4L85-E units. OE and aftermarket shafts simply don't hold up in extreme horsepower applications, leading to spline twist and shaft breakage. Sonnax replacement extreme duty main shafts are manufactured from an exceptionally tough high-strength Aermet steel alloy with proprietary heat treatment for unrivaled performance and durability. An advanced torsional design with spline and cross-hole refinements make these the most durable 1 in. main shafts available. These shafts withstood extensive track and lab testing with unbroken results in the most extreme applications. Additional details: * Recommended for applications above 1,000 hp * Top-notch engineering and precision manufacturing deliver unrivaled performance and durability in the 1 in. stock size * Rear spline prevents the rear internal gear journal-end from twisting off by engaging the full internal spline of the gear * Extensive in-vehicle and lab testing with unbroken performance
Not Yet Reviewed
$978.48
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