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7th Gen Drivetrain Transmissions, clutches, and axles.

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Old 09-19-2012, 03:20 AM   #1 (permalink)
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Smile Transmission Service

Hello Everyone,

I have a 03 Impala Ls with a 3.8L V6 engine and i would like to know do anyone have any step by step instructions on how to change the automatic transmission filter and also how many quarts of transmission fluid do i need to refill the transmission....Thanks


P.S. would adding a transmission additive along with my transmission fluid help or harm my transmission

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Old 09-19-2012, 10:13 AM   #2 (permalink)
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Sure, simple. Raise and support the front end, get the biggest drain pan you can find, you'll need a funnel, medium sized flathead screwdriver, hammer, and a ratchet with an extension and 10mm socket. Take out the pan bolts, be careful because fluid will start pouring out before you get them all. Save the gasket and reuse it if it is the metal core and rubber gasket, if it's fiber throw it out and get it all off the sealing surfaces. Pull the filter, it's only pressed in. Use the hammer and screwdriver to carefully get the filter seal out, hurt the seal all you want, just don't hurt the case. Carefully drive the new seal in till it seats, lube it with fluid, and install the new filter, then reinstall the pan. Tighten bolts every other bolt all the way around till you get all of them, get them good and snug, but not too tight as they will break off. Use the funnel and add fluid through the dipstick hole, should be about 7 quarts, pour in 6, then with the car level, start the engine and shift slowly through all the gears with your foot on the brake. Engine still running, car in park, get out and check the fluid level, add as needed. Done.

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1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

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Old 09-19-2012, 10:37 AM   #3 (permalink)
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Hi:

Remove the 20 oil pan bolts Remove the oil pan and catch the fluid in a catch panRemove the oil pan gasket . Use a screwdriver in order to pry the oil filter assembly out of the case. Do not damage the case sealing surface. Use a small screwdriver in order to pry the oil filter seal assembly out of the case. Do not damage the case sealing surface. Inspect the oil pan for the following conditions:
A damaged sealing surface

A dented or cracked bottom surface

Inspect the oil pan gasket for the following conditions:
A bent or damaged seal core

A damaged rubber seal surface
A damaged gasket
Inspect the oil pan magnet for damage or misalignment Clean the oil pan , the oil pan gasket and the oil pan magnet in order to remove any sediment. Inspect the oil pan magnet for steel particles. Excessive amounts of steel shavings indicate internal transmission damage. Lubricate the oil filter seal assembly with transmission fluid. Using a socket of the same size as the seal and a plastic mallet, gently tap the oil filter seal assembly into the case. Install the oil filter assembly into the case . Install the oil pan gasket onto the case . The old gasket is reusable if the gasket is not damaged. Install the oil pan onto the case . Caution! Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
install the 20 oil pan bolts.

Tighten the bolts to 14 Nm (10 lb ft).
Always use DEXRON-III labeled automatic transaxle fluid.
Using a long-neck funnel in the dip stick fill tube add 7.8 quarts then after adding fluid, recheck the fluid level re check the level useing the proper procedure and check for leaks.

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Old 09-19-2012, 10:45 AM   #4 (permalink)
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I think i might have to type just a bit faster, there kingnutin all good points here.

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Old 09-19-2012, 02:55 PM   #5 (permalink)
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One note to change on yours, do NOT use dexron III, use dexron VI.

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1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

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Old 09-19-2012, 05:44 PM   #6 (permalink)
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I feel that on a rebuild dexron VI would be the plan. On a pan drop i would stick dexron III back in to keep the all dexron III. I know that GM says its ok to add IV in to III but not to add III into dexron IV system.
On the transmission additive question i would stay away from additives.
I did put Z max trans in a 700r4 with 120000 miles and it was still working at 220000 miles so was it a good idea or not?

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Old 09-19-2012, 07:28 PM   #7 (permalink)
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Thanks guy's, I appreciate everyone's time and patience

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Old 09-20-2012, 04:34 PM   #8 (permalink)
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The old spec was dex III, but was updated to dex VI even including the 7th gens, since its full synthetic it handles heat much better and the trans will last much longer. As for mixing, it won't do any harm. They say not to add III to VI, but you can add VI to III, thats only because they don't want you adding the old type at all.

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1978 Caprice Classic Landau
350 2-bolt, stock 4bbl
Stock rebuilt TH350
Edelbrock performer cam + intake
Dual 2 1/2" Flowmaster exhuast (waiting to be installed)
Edelbrock IAS Classic shocks
95 9C1 3.08 posi
4 wheel disc brakes!
16x8 American Racing Baja's with 225/60/16 Pirelli P4's

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