Sonnax

TH350 Oversized Accumulator Pin & Reamer Kit

A burned or complete failure of the direct clutch on the THM 350 transmission can be created by accumulator cross leaks. A drivability complaint of a long slide on the 2-3 shift can result from...

TH350 TH400 Powerglide HD Pump Bushing (Steel - 0.615'')

Worn babbit pump bushings in GM Powerglide, 350, 400 and Allison®AT540 units allow the converter hub and inner pump gear to move off-center, causing damage to the pump gears and pump housing...

TH350C Rebuilt HD Sonnax Governor

This is a high quality Sonnax rebuilt HD performance governor for Turbo 350 and 350C automatic transmissions.

TH400 4L80E Manual Shift Shaft Kit (1985-1994) 4.660''

4L80-E, 4L85-E, Turbo 400 Transmissions Manual Shaft Lever - 4.660'' Long  Includes 2 Flange Nuts 1985-1994 Sonnax

TH400 Boost Valve Kit (No O-Rings Style) Sonnax

TH400 Boost Valve KitPart No. 34910-05K Factory Style, No O-Rings Vehicles with a THM 400 transmission frequently have poor line rise, soft 1-2 and/or 2-3 shifts,and/or Reverse engagement...

TH400 Boost Valve Kit (O-ring Style) Sonnax

TH400, TH425 Boost Valve KitPart No. 34910-01K O-Ring Style Vehicles with a GM 400 and 425 transmissions frequently have poor line rise, soft 1-2 and/or 2-3 shifts and/or Reverse engagement...

TH400 High Performance Sonnax Updated Governor

This Turbo 400 governor has been rebuilt by Sonnax for use in high performance applications. 2nd Design Sonnax Number 400

TH400 Line Pressure Booster Kit

TH400 Line Pressure Booster KitPart No. 400-LB1 Sonnax hydraulic line pressure booster kits contain stronger pressure regulator springs and large ratio boost valves designed to work together...

TH400 Manual Shift Shaft Kit

TH400 Manual Shift Shaft KitPart No. 38511-05K Fits GM TH400 units only! The manual shift shafts in GM TH400 units become corroded in harsh environments and are not suitable for reuse,...

Torx Plus Bit by Sonnax | TP-50+ Bell Housing Bolt Tool

Sonnax now offers a specially designed Torx® Plus bit 77000-HBK for removing 4L60-E bell housing bolts. The bit has a tighter fit with the drive head of the bolt. This helps avoid rounding...

Vacuum Test Stand Kit by Sonnax

Vacuum Test Stand KitPart No. VACTEST-01K Vacuum testing is an efficient way to evaluate valve and valve body wear. A worn valve or valve body bore can result in incorrect pressures in the...

Valve Body Clip - Sonnax

This is a replacement hair pin style valve body retainer clip used in many manufactures automatic transmissions.  Manufactured by Sonnax this is a part made to last and outperform its OE...

Valve Body End Plug Kit 5R55W 5R55S

In Ford 5R55W and 5R55S valve bodies, some end plugs and their bores are often worn due to small movements of the end plug within the bore. This motion is caused by continuous rapid fluctuations of...

Valve Body Reaming Fixture - Sonnax

In certain applications there is no way to pilot a reamer to repair a worn valve body, forcing rebuilders to purchase new ones. This patented self-aligning fixture with specially designed tool kits...

TH400|4L80E Upgraded Sonnax No Walk Out Case Bushing

GM Turbo 400 / 4L80E / 4L85E Sonnax Case Bushing "No Walk Out" Part No. 34006-SP Case Width: 0.690" Housing Bore: 2.129" Shaft Dia.: 2.006" Material: Bronze Bushing...

A618|47RE|47RH|48RE Sonnax Smart-Tech High Capacity Input Shaft & Piston Kit 22121B-02K

Based on the ultra-durable, one-piece Sonnax heavy duty input shaft 22121B-01 for Chrysler 47RE, 47RH, and 48RE units, the Smart-Tech high capacity input shaft and piston kit...

** NLA** A618 46RE 47RH 47RE 48RE Sonnax Sure Cure Kit (1990-UP) SC-46/47RHE

This product has been discontinued by the manufacture and replaced with 46-47RHE-ZIP.  CLICK HERE to go to replacement part.  Thank you!   The Sure Cure® KitPart No...