I found a round magnet in my transmission pan i need to know where it came from and how to replace it

auto transmissions are real sensitive to oil and flow issues. Not knowing your make, year, and service history, I will make the following suggestion. Have your transmission serviced with a Flush, filter change, and new oils. This should fix any flow issues that can cause this problem. If still an issue after that, you will need to have it serviced or it will fail in the long run.

NOTE: service facilities such as Oil & Go, have this flushing service available at a flat rate charge and I would use this type service rather than a transmission shop....but that is your choice .... hope this helps...
JP

Change of fluid and filter helps. The condition of the old oil will tell you weather there might be more damage. Debris on the oil may also be found in the transmission solenoid which controls the fluid which engages the gears. Your solenoid may be dirty or damaged. It is also possible that the valves for the 3rd gear is dirty that is why you are staying on the 2nd gear. These two components needs to be inspected further by opening the transmission.

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.

Remove the transmission pan, after pan is removed, the filter will be clearly visible. Pull straight down on the filter in a wiggleing fashion, it will pop right out of the transmission. Install new filter, clean out trans pan and magnet inside pan. Install trans pan and add approx. 2.5 qts. of new trans fluid. Start vehicle and let it get to operating temperature. Shift through all gears and re-check fluid level in trans. Add fluid as needed.
Done!

first check your transmission fluid if fluid level is ok transmission is bad and will need rebuilt or replaced

first off drain the fluid out of the transmission pan. I always remove the return hose(which is driver side on rad base) and put into a container. Put e-brake on start vehicle and put into drive, this will drain fluid out of transmission. When fluid stops flowing, re-attach return line to rad, put transmission back into park, shut off engine. Remove drain plug from bottom of transmission pan to drain remaining fluid. You will have to disconnect the front axle drive shaft to remove transmision pan. There are 4 bolts attached to flange at front of axle. Remove these bolts and nuts only and move shaft out of the way. Mark placement of at least 1 bolt on flange. If the bolt placement is not correct you will have vibration when 4 wheel drive is engaged. (Grease the bolts when putting back together.) Remove transmision dip stick from holder. There are 2, 10 or 12 mm bolts that hold the dip stick holder in place. These are 1/2 way down the holder and are attached to engine. You can reach these from top or bottom of vehicle. Replace at least 1 bolt when you put back together. If not the holder will vibrate against engine and will be annoying.
There are 10mm bolts holding the pan in place, remove all but one. When ready ensure there is enough clearance to allow the transmission pan and holder to be removed. Remove last bolt, as the pan drops, you will have to keep the pan level. Basically hold the pan and pull it down in a way that removes the dipstick holder. Since you have the pan off replace the fluid filter and clean plate filter is attached to. Also clean off magnets in transmission pan. The magnets are what picks up any metal pieces. Leave magnets in pan. When putting pan back on replace gasket if required and tighten bolts in offsetting pattern to allow for even seal. I believe it is only 14lbs torque required for the bolts. Do not over tighten as these will strip easily.

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.

Drive the Durango for 15 to 20 minutes to warm up the transmission fluid. When the fluid is warm, it will drain better and remove more contaminants from the engine. Raise and support the front of the Durango on ramps or jack stands. Place a large drain pan beneath the transmission.

Loosen the transmission pan retaining bolts with a socket wrench. Remove the bolts, but leave one at each of the four corners of the transmission pan. Slowly loosen the remaining bolts a little at a time.Fluid should begin to drain from the seal on the transmission pan. If the pan is stuck, break the seal by gently prying it loose or tapping it with a rubber mallet.

Support the pan with one hand and remove the bolts on one side of the pan. Allow the transmission fluid to drain until it stops. Remove the two last bolts. Remove the pan and drain the rest of the fluid.

Remove the three screws that hold the filter onto the transmission. Note that these screws may be Torx style. Install a new transmission fluid filter.

Clean the transmission pan and the magnet with solvent. Remove the old gasket material from the transmission pan. You may need a scraper to remove it all. Clean the mating surfaces with a lint-free cloth soaked in solvent. Let the pan air dry.

Put the new gasket on the pan and align them. Remove the gasket, apply a few drops of adhesive on the pan and replace the gasket. Realign the gasket before the adhesive dries.

Replace the pan onto the transmission and replace the retaining bolts. Tighten the bolts in a crisscross fashion to 150-inch pounds with a torque wrench. Return the Durango to level ground.




Refill the transmission with new fluid a little at a time, while checking the level often. Continue to add transmission fluid until it passes the "Add" mark on the dipstick, but doesn't pass the "Full" mark.

Start the engine, shift the transmission through all the gears and place the gear selector back in "Park." Recheck the transmission fluid level and add more fluid if needed. Don't overfill the transmission.

Replace the dipstick into the filler tube. Turn off the engine.

I assume you have an automatic transmision (the manual is basically "fill and forget unless it leaks" as it wasn't designed with a drain point, but check the level periodically, anyway) Like pretty much all auto trans, the filter is located inside the bottom pan, and for Saab is a metal encased rectangular unit, with rounded end. It is cleanable and re-used. Drain the pan; clean the pan exterior and drop it; remove filter mounting bolts and filter and clean with suitable solvent or clean ATF; clean pan and magnet in pan and reinstall magnet in the SAME position; re-install filter with NEW O ring; dry pan and re-install with NEW gasket (no sealant); install drain plug; re-install cross members/support plates what have you torques: pan mounting bolts 71-106 in-lb drain plug 44-71 in-lb REFILL the transmission, and with handbrake on and engine running, shift through all gears. Then re-check fluid levels and check for leaks. If this helps you, please give a "thumbs up" thanks Saabreur

THERE SHOULD BE A DIMPLE IN THE PAN BUT AS LONG AS ITS IN THERE IT WILL BE OK