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Old 06-11-2011, 05:33 PM   #11
rluck9277
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Default Re: Changing the Transmission filter on my 4T45 this weekend....

Well I orginally wanted to go with Mobil Synthetic Dexron VI ATF, but I couldn't find it anywhere. They show it on their website, but it apparently is a new product that isnt available yet. So I ended up using Castrol Dexron VI, which is a synthetic blend. Not sure if it is the Castrol or just the fact that I have new fluid in there, but we took it to dinner and shiftes SOOO good. Never realised new fluid could make such a difference. And like I said above, it did have that clunk that every GM car with a 4T45 in it that I have been in has when you shift from reverse to drive, but it went away after the fluid good circulated and warm.

It ended up taking exactly 7 quarts to refill it. Here are a few pics....

The trans with the pan off


The pan after I got it, and the magnet cleaned, and the gasket on


Where the filter goes into the bottom of the transmission
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Old 06-11-2011, 05:49 PM   #12
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Default Re: Changing the Transmission filter on my 4T45 this weekend....

Here is one more pic of the bottom of trans with the old filter off


I was kinda surprised at how little was under the pan. I remember on the 700R4 for my 88 camaro there was the valve body and all sorts of other valves and solenoids. I guess on a front wheel drive car the valve body is on the side.

If anybody else decides to do this themselves, it is very easy to drop the pan without spilling alot of fluid. Just make sure you have a big catch pan to catch the fluid, and start taking the bolts out in the middle of the pan that face the back of the car. Start in the center and work your way out, and after you get the back row out, the fluid starts coming out. I loosened the outer edge bolts a bit and it was coming out pretty well, so I just let it drain for awhile and when no more fluid was coming out, I just took the rest of the bolts out and dropped the pan. When you get the last three bolts or so, support the pan so that you dont bend the lip.

Then everythings else is pretty easy, there is no bolt holding the old filter in, just pull it down and out with a twisting motion, just make sure you have a drain pan underneath it cause there is about half a quart of fluid in it. Then use a screw driver and hammer to carefully tap in a side of the fitting that the filter goes into. Instal the new fitting, install the new filter, bolt the pan back up, and add 7 quarts of fluid.

Start the car, let it run a few minutes and then put it in reverse and drive and run it up through the gears acouple of times(Do this while on a hoist or jack stands, just be carefull). Then get underneath and pull out the fill/vent bolt. In my case no fluid was coming out, so added a half a quart and it almost instanly started coming out of the hole. So let it go a while till no more fluid was coming out and put the bolt back in. (This is all done while it is running). Then just take it down and go drive. Pretty simple.
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Last edited by rluck9277; 06-11-2011 at 07:12 PM.
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Old 06-12-2011, 02:16 PM   #13
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Default Re: Changing the Transmission filter on my 4T45 this weekend....

Nice write up and pictures. I also have the same trans. I have 32K miles right now, so I not ready yet. While my car is under the 5yr/100K warrantee, I'll take it to the dealer so there is an official receipt should something crap out and they point the finger at me.

I usually do my own oil changes, but I just had the 1st one done since I bought mine in Jan '11, at the deal, so there would be a record of it. I did have them put in my Mobil 1 full synthetic oil in though. It only cost $18 with my oil, and they even washed it for me!
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Old 06-12-2011, 05:08 PM   #14
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Default Re: Changing the Transmission filter on my 4T45 this weekend....

Quote:
Originally Posted by bullitt4204 View Post
I have 32K miles right now,

I usually do my own oil changes, but I just had the 1st one done since I bought mine in Jan '11, at the deal, so there would be a record of it.
Something is wrong with this picture.

32,000 miles in 6 months......and you are just now doing the first oil change ??

Is there a small detail missing here.....like you bought it used 6 months ago with ~ 25K miles already ON it ??
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Old 06-13-2011, 05:50 AM   #15
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Default Re: Changing the Transmission filter on my 4T45 this weekend....

Quote:
Originally Posted by MalibuKen View Post
Something is wrong with this picture.

32,000 miles in 6 months......and you are just now doing the first oil change ??

Is there a small detail missing here.....like you bought it used 6 months ago with ~ 25K miles already ON it ??
I bought it used in Jan 2011, with 27K miles on it. It's a 2010 Malibu.
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I love this car!

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Original owner 22K miles

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Old 07-15-2011, 04:51 AM   #16
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Default Re: Changing the Transmission filter on my 4T45 this weekend....

For the procedure on the first page, what do they mean by "remove the air"
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Old 07-29-2011, 06:22 PM   #17
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Default Re: Changing the Transmission filter on my 4T45 this weekend....

I did my 4T45E at 25K Miles. Used a Purolator Filter kit and Castrol Dex VI. Used all 7 Qts. Had to reuse the factory Trans Pan Seal. When I hit 50k I am replacing it. Along with a new Purolator filter and Castrol fluid.
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Old 08-10-2011, 05:50 PM   #18
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Default Re: Changing the Transmission filter on my 4T45 this weekend....

I do everything myself minus a tire rotation+balancing and trans fluid. I usually spend the $120 bucks and get it flushed/cycled out on a car for the fear that something like what was posted by several others occurring to me.. My Xterra was parked and chocked so easy to do, plenty of vehicle clearance without any jacking/ramps.

Heck, I don't even like being under the car with my Rhino Ramps. I don't trust anything short of a lift, but i don't have that luxury as much as I'd like.

Last edited by knightblaze; 08-10-2011 at 05:53 PM.
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Old 08-30-2011, 11:37 AM   #19
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Default Re: Changing the Transmission filter on my 4T45 this weekend....

Dang, I'm at 70k miles and still haven't changed the fluid. I NEED to do this! Thanks for the writeup!
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Old 10-02-2011, 12:52 PM   #20
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Default Re: Changing the Transmission filter on my 4T45 this weekend....

The manual also states to remove the oil level control valve and replace the O-Ring? It can be seen in the picture in post #12. Is this necessary or no?
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