Product Details

Master rebuild box kit for the 4L30E automatic transmissions.

For GM, BMW, Cadillac, Honda, and Isuzu applications

This kit fits the 1990-up 4 speed overdrive transmissions

This high quality transmission master overhaul rebuild kit contains

• Overhaul gasket set – Toledo Driveline or Transtec
• Exedy friction clutch plates
• Fluid filter
• Front pump bushing
• Case bushing
• Extension housing bushing

Along with the clutches, filter and bushings within this kit, we offer two options for the overhaul gasket set. The Toledo Driveline set is a bit more economical in price. The Transtec gasket set included in this overhaul banner box kit is the highest quality available. Both sets include every rubber seal, paper gasket, O-ring, sealing rings, and metal clad seals that you will need to complete your rebuild. The Transtec gasket sets are considered a premium kit, with higher quality gaskets and seals throughout.

Remember to soak all of your clutches in transmission fluid for thirty minutes before you install them.

Additionally, you can add the following upgrades to the 4L30E banner box kit:

• All steel plates - *Pictured
• Low – 1st gear band - *Pictured
• Overrun clutch molded rubber bonded piston - *Pictured
• Full bushing kit
• Thrust washer set
• Third gear sprag - one-way clutch
• Overdrive roller, one-way clutch
• Transgo shift kit, Superior Shift Correction Kit, or TransLab valve body kit
• Low band billet Super Servo
• Boost valve – Sonnax medium or large ratio
• Assembly grease - Lubegard, Life Smart Blend, or Transjel
• Platinum Lubegard - Insider tip: Many shops use this synthetic supplement in every freshly rebuilt transmission to keep them on the road past the warranty.
• Cooler line flush - Lubegard Kooler Kleen or Brand One
• ATSG Rebuild manual

The 4L30E transmission is a 4 speed overdrive; rear-wheel drive, all-wheel drive, and 4x4 automatic transmissions. This transmission can be identified by the two fluid pans. 

These units can be found in the following BMW, Cadillac, Honda, and Isuzu applications.

BMW

• 318i 1991-1997
• 318is 1991-1997
• 323i 1998-1999
• 323is 1998-1999
• 325i 1991-1995
• 325is 1991-1995
• 325iX 1991
• 525i 1991-1995
• 528i 1997-1999
• Z3 1996-2001

Cadillac

• Catera 1997-2001

Honda

• Passport 1994-2002

Isuzu

• Amigo 1999-2000
• Axiom 2002-2004
• Rodeo 1992-2004
• Trooper 1992-2002
• VehiCROSS 1999-2001

These transmissions are known by multiple names, including: 4L30, 4L30E, R1, R-1, RMQ, and ML4

This automatic transmission rebuild kit fits the following years: 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, and 2004.