Congratulations! You have just pur-chased one of the finest cast alumi-num pans available for the GeneralMotors 4L80E Transmission. The B&M4L80E Cast Aluminum Deep Oil Panhas been designed to work on all 1993through 1998 Chevrolet/GMC C/Kseries trucks with the 4L80E transmis-sion. The B&M 4L80E Cast Alumi-num Deep Oil Pan provides severaladvantages over stock factory oil pans.The extra capacity provides increasedoil volume and added cooling, while thealuminum construction increases caserigidity. The magnetic drain plug fea-ture allows regular transmission main-tenance and oil changes without theusual mess associated with �droppingthe pan,� and limits ferrous debris fromcirculating in the transmission.This B&M 4L80E Cast AluminumDeep Oil Pan can be Installed by any-one with minimum mechanical expe-rience. It is however, important toclosely follow the instructions.We recommend that you read throughthe instructions completely before be-ginning the installation, so you can fa-miliarize yourself with the installationprocedure. Check the tool list at theend of these instructions for the tools

required to install your B&M 4L80ECast Aluminum Deep Oil Pan.When installing your Deep Oil Panthere are several other B&M productsyou may wish to consider:TRANSMISSION OIL COOLER: Wefeel that it is very important that everyvehicle should have a transmission oilcooler in addition to the radiator heatexchanger. Heat is the major cause oftransmission failures, and an oil cooleris an inexpensive safeguard againstoverheating. B&M offers a wide rangeof transmission coolers to suit everyneed, which are available at your B&Mdealer.TRICK SHIFT PERFORMANCE ATF:Trick Shift performance automatictransmission fluid is the industry�sleading performance ATF. A speciallyblended oil with foam inhibitors, ex-treme pressure agents and shift im-provers, this fluid assures protectionwhile delivering the fastest possibleshifts. You literally �Pour in perfor-mance.� Available at your B&M dealer.

INTRODUCTION

This Deep Oil Pan can be installed inabout an hour by carefully following the

instructions. Transmission compo-nents are precision fit and dirt is thenumber one enemy of an automatictransmission. Cleanliness is very im-portant, so a clean work surface fromwhich oil can easily be removed isnecessary.Caution: Automatic transmissions op-erate at temperatures between 150°Fand 250°F. It is suggested that thevehicle be allowed to cool off for a fewhours to avoid burns from hot oil andparts. The vehicle should be off theground for ease of installation - jackstands, wheel ramps or a hoist willwork fine. MAKE SURE VEHICLE ISFIRMLY SUPPORTED - DO NOTWORK UNDER A VEHICLE IF IT ISSUPPORTED BY ONLY A JACK! Tryto raise the vehicle 1-2 feet so you willhave plenty of room to work. Also, havea small box to put bolts in and a drainpan to catch oil.

INSTALLATION

STEP 1. Drain the oil pan. Loosen andremove the oil pan bolts one at a time,working towards the front of the trans-mission. Remove the last two boltsslowly and the pan will tilt down to al-

Printed in the USA 9500642-01

Installation Instructions4L80E Cast Aluminum

Deep Oil Pan#70295

© 1998 by B&M Racing and Performance Products

Parts List1 Aluminum Cast Oil Pan1 Magnetic Drain Plug1 Drain Plug Gasket1 Filter Seal1 Filter Extension Tube1 Filter Support Bracket17 M8-1.25 x 30 mm Bolts17 Flat Washers

Tool ListDrain PanGasket Scrapper3/8� Rachet & 3� Extension13 mm Socket3/4� Box WrenchFlat Blade Screwdriver6 Quarts ATFJack & Jack Stands

Figure Two

Figure One

Orient filter bracket inthis direction.

Remove this bolt andinstall filter bracket.

This end insertedinto pump

Make sure the extension is seated all theway into pump

Lubricate seal with ATF

Filter tube

low the last of the fluid to drain. If thepan sticks to the rubber gasket, pry itdown slightly with a screwdriver tobreak the seal before removing the lasttwo bolts. After the last bolt is removed,the pan and rubber gasket can be low-ered and set aside.STEP 2. The oil filter will now be ex-posed. Pull the filter out of the oilpump, being careful not to bend thefilter pickup tube as it is plastic andmay crack or break. The seal shouldremain in the pump - if it comes outwith the filter, remove it from the filterand carefully reinsert it back into thepump. B&M recommends that the fil-ter be changed at this time.STEP 3. The filter must be held in placewith the supplied steel bracket. Thisbracket is held in place by one of thevalve body bolts (please see figureone). Remove the bolt shown and in-stall the bracket (point the bracket to-wards the side of the vehicle asshown). Tighten the bolt to 8 lbs-ft -do not over tighten!STEP 4. Lubricate (with transmissionfluid) and install the supplied seal onthe filter tube as shown (please seefigure two). Place the filter and seal inthe tube. Install assembly back intothe oil pump bore being careful not todamage the seal in the pump.STEP 5. Clean the original rubber gas-ket. Install the deep pan using theoriginal rubber gasket and the suppliedpan bolts and washers (torque to 12lbs-ft). Do not overtighten as this cancause leaks. Make sure drain plug istight.STEP 6. Lower vehicle and add sixquarts of Dexron III or B&M Trick ShiftATF.STEP 7. Start the engine and placeshifter in the neutral position. Add fluiduntil the oil level is at the �add� mark.Shift the transmission through all gearpositions. Check the oil pan and gas-kets for leaks. Once the transmissionhas warmed up, add fluid to bring thelevel up to �full.� Do not overfill as thiscauses foaming and overheating.