Description
Standard E4OD / 4R100 OEM Pump Gear Set, 1995-Up for F5 and F8 Pumps, Sonnax 36438A-03.
E4OD Pump Gear Set (STOCK SIZE)
Part No. 36438A-03
- Inner Pump Gear
- Outer Pump Gear
Late style / OE size.
Sonnax offers high-quality replacement gear sets for F5 and later E4OD pumps. There are two different designs, direct replacement gear set 36438A and an oversized gear set 36438AX-01K, and both meet or exceed OE pump gear performance.
- Oversized gear has improved fit and durability of pump-to-torque-converter interface.
- Direct replacement gears work with any F5 and later pump housings, and requires no machining.
- Oversized version fits F5 and later pump housings with excessive wear by allowing pump housings to be refurbished by machining the pump cavity.
- Both gear sets designs meet or exceed OEM pump gear performance.
Please note that in 1995 the E4OD pump was redesigned to utilize pump gears with 10 lobes on the outer gear, and prior to 1995 the outer pump gear had 11 lobes. The pump casting was also revised. Prior to 1995 the pump casting was designated as E9 or F1. Beginning in 1995 the casting designation was changed to F5 and is currently F8. The E9 and F1 E4OD pumps suffered from low pump output and should be replaced with an F5 or later model pump.
- Code 62, 628, 1744
- Damaged impeller hub
- Damaged pump gears
- Excess pump noise
- Low line pressure
- Repeated converter failure
Cause:
- Wear on the pump gears and with the mating impeller hub reduces pump capacity and increases pump noise.
- These direct replacement and oversized gears are specially designed to improve the fit and durability of the pump-to-torque-converter interface.
