Pumps & Pump Parts

4L80E Pump Assembly (1991-1996) 2-Cooler Fittings Behind Bell Style

This is a rebuilt early 4L80E transmission pump that has two cooler fittings behind the bell style.

4L80E Rebuilt Pump Assembly (1997-2003) 1-Cooler Fitting Behind Bell

NAME YEARS 4L80-E 1997 - 2003 4L80-E-HD/MN8 2002 - 2002 4L85-E 2002 - 2003  

4L80E Pump Assembly w/ 1-Cooler Fitting New Design Case (2004-UP)

This is a ready to install rebuilt 4L80E transmission pump assembly.  It is the one cooler fitting and new design case style pump.  

4L80E Pump Bolt - Used

Quality cleaned and inspected used 4L80E pump bolt.

TH400 4L80E Pump Stator & Center Support Sealing Ring - Metal

This is a high quality replacement metal sealing ring found on the pump stator and center support of GM Turbo 400 and 4L80E automatic transmissions.

4L80E TCC Conversion Valve by TransGo

This TransGo 48-CCV valve kit fits 1991 to 2013 General Motors vehicles equipped with the 4L80E and 4L85E automatic transmission. When used in high performance or transplanted vehicles for off-road or strip use at times there may be a desire to...

4L80E Boost Valve Kit (O-Ring Style Pumps)

Boost Valve KitPart No. 34200-01K O-Ring style. Kit can be retrofit to back to '89 units. See instructions for details. Common problems in vehicles with GM 4L80-E and 4L85-E transmissions are uncontrollable line rise (upward of 500-600 psi), high...

4L80E Boost Valve Kit - Sonnax

Common problems in vehicles with GM 4L80-E and 4L85-E transmissions include uncontrollable line rise (upward of 500 psi), high line pressure in Reverse, broken direct clutch drums and/or broken cases. These problems can be caused by excessive EPC torque...

4L80E Line Pressure Booster Kit by Sonnax

4L80E 4L85E Transmission Line Pressure Booster Kit Sonnax Part Number: 4L80E-LB1 Sonnax hydraulic line pressure booster kits contain stronger pressure regulator springs and large ratio boost valves designed to work together to provide progressive...

4L80E Pump Pressure Regulator Valve by Sonnax

The OE pressure regulator valve design prevents adequate cooler flow at low RPM and high pressure/demand conditions, which can create overheat complaints. Additionally, in '99-later vehicles, the factory EPC pressure was set high at idle, resulting in...

4L80E Boost Valve Kit (1991-UP w/ Factory Style Sleeve) (Sonnax)

Upgraded 4L80E Boost Valve

4L80E 4L85E Pump Gear Set (1991-UP)

This is a new high quality set of GM 4L80E and 4L85E transmission pump gears for 1991 and up models. Industry Part Number: A34530