Where is the transmission fluid oil pan? - 1998 Mitsubishi Diamante

1. Remove transmission oil pan (be careful oil will splash all over)
2. Remove all bolts slowly, so oil will drain slowly
3. Transmission oil pan gasket is reusable
4. Clean oil pan and let transmission oil drip then reinstall pan and gasket.(At the same time you can change the transmission oil filter.
5. Fill with transmission oil fluid (see specification) 4 liters Dexron4 fluid
6. Start the engine place transmission lever to park or neutral
7. At the same time remove plug (see pictures ) until fluid comes out the transmission plug hole. (replace the plug)



Hope it helps.

transmission filter in the bottom of transmission bolted to valve body.you need a large drain pan.place drain plug under transmission oil pan.remove transmission oil pan drain plug.let all transmission fluid drain out then screw back drain plug in oil pan.then you need to remove transmission oil pan then remove filter and replace pan gasket also.make sure you have right amount transmission fluid on hand.buy extra because if you short of fluid you cant drive car if fluid level too low.make sure you get the right amount fluid.torque pan bolts to 96 inch pounds.

TRANSMISSION FLUID LEAKS,CAN BE FOUND AROUND PAN GASKET.CHECK PAN GASKET,IF IT LOOKS WET AND YOU SEE FLUID DRIPPING AROUND THE EDGE OF OIL PAN, REPLACE PAN GASKET, WHILE YOU REPLACING PAN GASKET REPLACE TRANSMISSION FILTER WHILE OIL PAN OFF.IF TRANSMISSION OIL PAN NOT LEAKING, CHECK TRANSMISSION OIL COOLER LINES GOING INTO RADIATOR YOU WILL LOOSE A LOT OF FLUID THERE ALSO TORQUE SHAFT SEAL WILL CAUSE HEAVY FLUID LEAK WHILE ENGINE RUNNING CHECK OIL COOLER LINES AND LOOK AT THE TORQUE AREA WHILE ENGINE RUNNING YOU WILL SEE FLUID POURING WHILE ENGINE RUNNING THE OIL PUMP PRESSURE WILL PUSH FLUID OUT AT THE LEAKING AREAS.

Raise the vehicle. Refer to Vehicle Lifting. Place a drain pan under the transmission oil pan. Remove the oil pan drain plug. Remove the oil pan bolts. Remove the oil pan. Remove the gasket. Remove the magnet. Remove the oil filter. Remove the filter neck seal. The transmission oil pan gasket is reusable. Inspect the gasket and replace as needed. Clean the transmission case and the oil pan gasket surfaces with solvent. Install the filter neck seal. Install the oil filter. Install the oil pan gasket to the pan. Install the magnet into the bottom of the pan. Notice: Refer to Fastener Notice in Service Precautions. Install the oil pan to the transmission with seventeen bolts. Tighten the oil pan bolts to 11 Nm (97 inch lbs.) . Apply a small amount of sealant GM P/N 12346004 to the treads of the drain plug. Install the oil pan drain plug. Tighten the oil pan drain plug to 18 Nm (13 ft. lbs.) . Install Dextron Automatic Transmission Fluid. Lower the vehicle.

TO DO A TRANSMISSION FLUID CHANGE YOU NEED HAVE TRANSMISSION FLUID ON HAND YOU NEED TRANSMISSION FILTER AND GASKET.YOU NEED 3/8 WRENCH THE RATCHET TYPE WITH METRIC SOCKETS. YOU NEED JACK TO RAISE VECHICLE SUPPORT VECHICLE ON JACK STANDS.YOU NEED A DRAIN PAN. ONCE YOU GET VECHICLE OFF GROUND.PLACE DRAIN PAN UNDER TRANSMISSION OIL PAN REMOVE OIL PAN DRAIN BOLT.LET FLUID DRAIN OUT IN DRAIN PAN THEN SCREW DRAIN PLUG BACK IN PLACE DONT OVER TIGHTEN.REMOVE OIL PAN AND GASKET. BESURE TO HAVE PAPER TOWEL ON HAND.MAKE SURE TRANSMISSION OIL PAN GASKET SURFACE CLEAN BEFORE INSTALLING NEW PAN GASKET. ONCE TRANSMISSION OIL PAN REMOVED. REMOVE THE OLD TRANSMISSION FILTER INSTALL THE NEW FILTER.THEN WITH NEW GASKET ON OIL PAN IN PLACE.OIL PAN NEED TO BE CLEAN SO THE GASKET ADHESIVE WILL HOLD PAN GASKET IN PLACE WHILE INSTALLING PAN AND GASKET TO TRANSMISSION.INSTALL OIL PAN BOLTS INSTALL THEM CRISS CROSS TORQUE PAN BOLTS TO 7 TO 10 FT LBS. LOOK IN OWNERS MANUAL FOR TRANSMISSION FLUID CAPACITY.BUY 10 QUARTS .TO BE ON SAFE SIDE SO YOU WILL HAVE ENOUGH FLUID ON HAND. IF YOU DONT HAVE NO TRANSMISSION FLUID CAPACITY. ADD 7.5 QUARTS FLUID.WAIT FOR 2 MINUTES.CHECK TRANSMISSION FLUID LEVEL ON DIP STICK. SHOULD BE ON THE FULL MARK.CRANK VECHICLE UP.LET IDLE FEW MINUTES CHECK TRANSMISSION DIP FLUID LEVEL IF DROPPED ADD LITTLE MORE.WHILE ENGINE IDLING GETTING WARM UP. KEEP EYE ON FLUID LEVEL.WHEN FLUID LEVEL STOP DROPPING. APPLY BRAKES HOLD FOOT ON BRAKES SHIFT THROUGH ALL GEARS TWO TIMES. THEN CHECK FLUID LEVEL SHOULD BE ON FULL MARK.CHECK FOR LEAKS WHILE ENGINE RUNNING.

I didn't read about running the engine at all during the transmission fluid change. --- Removal & Installation 4L60E/4L65E To Remove:

1. Raise and safely support the vehicle.
2. Place a drain pan under the transmission.
3. If equipped with a drain plug, drain the transmission fluid.
4. If necessary, remove the bolts and position aside the range selector cable bracket for clearance while lowering the pan. It is not necessary to remove the cable from the lever or bracket.
5. Remove the catalytic converter.
6. Remove the oil pan bolts from the front and sides of the pan only.
7. Loosen the rear oil pan mounting bolts about 4 turns.
8. Lightly tap the oil pan with a rubber mallet in order to loosen the pan and allow the fluid to drain.
9. Remove the remaining oil pan bolts.
10. Remove the oil pan and the gasket.
11. Remove the filter by twisting and pulling on it.
12. Remove and discard the filter seal. The filter seal may be stuck in the pump; if necessary, carefully use pliers or another suitable tool to remove the seal.
13. Clean the transmission and the oil pan sealing surfaces with solvent, and air dry. You must remove all traces of the old gasket material.

To Install:

1. Coat the new filter seal with transmission fluid.
2. Install the new filter seal into the transmission case. Tap the seal into place using a suitable size socket.
3. Install the new filter.
4. Install the oil pan and new gasket. Tighten the bolts alternately and evenly to 97 lb in (11 Nm).
5. Install the catalytic converter.
6. If previously removed, install the range selector cable bracket and bolts. Tighten the bolts to 18 lb ft (25 Nm).
7. Apply a small amount of sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent to the threads of the oil pan drain plug, if equipped.
8. Install the oil pan drain plug, if equipped. Tighten the plug to 13 lb ft (18 Nm).
9. Lower the vehicle.
10. Fill the transmission to the proper level with DEXRON® III transmission fluid.
11. Check the COLD fluid level reading for initial fill only.
12. Inspect the oil pan gasket for leaks.

4L80E/4L85E To Remove:

1. Raise and suitably support the vehicle.
2. Place a drain pan under the transmission oil pan. Drain the transmission fluid and install the plug. Tighten the drain plug to 13 lb ft (18 Nm).
3. Support the transmission with a transmission jack.
4. Remove the transmission crossmember.
5. Disconnect the range selector cable end from the transmission range selector lever ball stud. NOTE: It is not necessary to remove the selector cable from the bracket.
   
6. Remove the transmission range selector cable bracket. Reposition the bracket and cable.
7. Remove the oil pan bolts. NOTE: The transmission oil pan gasket is reusable. Replace as needed.
   
8. Remove the oil pan and gasket.
9. Remove the magnet from the bottom of the pan, if necessary.
10. Remove the oil filter and neck seal.

To Install:

1. Clean the transmission and the oil pan sealing surfaces with solvent.
2. Install the filter neck seal and filter.
3. Install the oil pan gasket to the pan.
4. Install the magnet into the bottom of the pan, if necessary.
5. Install the oil pan and bolts. Tighten the oil pan bolts to 18 lb ft (24 Nm).
6. Install the transmission range selector cable bracket. Tighten the bolts to 18 lb ft (25 Nm).
7. Connect the range selector cable end to the transmission range selector lever ball stud.
8. Install the transmission crossmember. Tighten the fasteners to 70 lb ft (95 Nm).
9. Install the transmission mount nuts. Tighten the nuts to 30 lb ft (40 Nm).
10. Remove the transmission jack.
11. Lower the vehicle.
12. Fill the transmission to the proper level with DEXRON® III transmission fluid.

Copied from AutoZone.com:


REMOVAL & INSTALLATION


See Figures 1 and 2

1. Raise and safely support the vehicle on jackstands.
2. Place a drain pan under the transmission.
3. Loosen the pan attaching bolts and drain the fluid from the transmission.

Always place used fluids and oils into a sealed storage container and take to an approved recycling collection facility. Never dump used fluids or oils on the ground or in a trash receptacle. Contamination to the environment can and will occur.

1. When the fluid has drained to the level of the pan flange, remove the remaining pan bolts working from the rear and both sides of the pan to allow it to drop and drain slowly.

Some AOD transmissions will have a plastic plunger type plug floating loosely in the pan when draining the fluid. It is of no importance and was used in the assembly process of the transmission. Discard it before reinstallation of pan.

1. When all of the fluid has drained, remove the pan and clean it thoroughly. discard the pan gasket. If equipped, remove the pan magnet.

Fig. Fig. 1: Unfasten the remaining bolts, then remove the transmission fluid pan from the vehicle



Fig. Fig. 2: On some vehicles, such as this 1995, you must remove and clean the pan magnet
To install:

1. Place a new gasket on the pan, then install the pan on the transmission. If equipped, don't forget to install the pan magnet. Tighten the pan attaching bolts as follows:
   
   C3 and C5 Transmissions: 12-16 ft. lbs. (16-22 Nm) A4LD Transmissions: 8-10 ft. lbs. (11-13.5 Nm) AOD Transmissions: 71-119 inch lbs. (8-13 Nm) 4R70W Transmissions: 9-11 ft. lbs. (12-15 Nm)
   
2. Add the correct type and quantity of fluid to the transmission through the filler tube.
3. Lower the vehicle. Start the engine and move the gear selector through shift pattern. Allow the engine to reach normal operating temperature.
4. Check the transmission fluid. Add fluid, if necessary, to maintain correct level.

FILTER SERVICE


See Figure 3

1. Remove the transmission oil pan and drain the fluid. For details, please refer to the procedure located earlier in this section.
2. Remove the screen and the filter from the valve body. Most screens are retained using a fastener; through some may use an interference fit between the screen tube and valve body.

Fig. Fig. 3: After the pan is removed, you can remove the transmission fluid filter
To install:

1. Install a new filter using a new gasket or O-ring.

If the transmission uses a filter equipped with a fully exposed screen, it may be cleaned and reused.

1. Install the transmission oil pan and properly refill the transmission.

how easily dies the shifter move? if it feels as if there is no pressure, then possibly the cable is broken. have you had the fluid level checked? maybe there is a leak you are unaware of.

Fluid - A/T: Service and Repair
Transmission Fluid and Oil Filter Changing
REMOVAL PROCEDURE
1. Raise and suitably support the vehicle. Refer to Vehicle Lift Points.
2. Place drain pan under pan
3. Remove oil pan bolts from front and sides only.
4. Loosen the rear oil pan bolts approximately four turns.
5. Lightly tap the oil pan with a rubber mallet or pry to drain the fluid from main case.
6. Remove the oil pan bolts from rear oil pan and gasket.
7. Remove front oil pan bolts leaving one corner bolt in loosely.
8. Lightly tap oil pan with rubber mallet or pry to drain fluid.
9. Remove the following remaining components:
^ The front oil pan bolts
^ The oil pan
^ The gasket
10. Remove the oil filter bolts and filter.
11. Clean the following components:
^ The transmission case
^ The front adapter case
^ The oil pan gasket surfaces with solvent
^ Air dry
^ All traces of gasket material must be removed
INSTALLATION PROCEDURE
1. Install the gasket.
2. Install the oil filter.
3. Install the bolts.
^ Tighten the transmission oil filter bolts to 20 Nm (15 ft. lbs.).
NOTICE: Refer to Fastener Notice in Service Precautions.
4. Install the front oil pan.
5. Install the front oil pan gasket
6. Install the front oil pan bolts
^ Tighten the front oil pan bolts to 11 Nm (96 inch lbs.).
7. Install the following components:
^ Install the pan
^ Install the gasket
^ Install the bolts
^ Tighten the oil pan bolts to 11 Nm (96 inch lbs.).
8. Refill the transmission with DEXRON III through oil pan fill plug on the side of the (main case) oil pan. Fill the transmission to lower edge of oil
pan fill. Fill plug opening using and oil suction gun.
^ Tighten the oil pan fill plug to 45 Nm (33 ft. lbs.).
9. Lower the vehicle.
10. Check the transmission fluid level. Refer to Transmission Fluid Checking Procedure.