a4 tranny fluid/filter change suggestions
Thread Starter
Instructor
Joined: Feb 2007
Posts: 142
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a4 tranny fluid/filter change suggestions
im going to change the tranny fluid and filter. i planned on using ac delco filter. is there a better filter to use (k&n ect.) is there a better tranny fluid then mobil synthetic. also while im there i plan on doing the differential. what type of fluid do you all use?
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
im going to change the tranny fluid and filter. i planned on using ac delco filter. is there a better filter to use (k&n ect.) is there a better tranny fluid then mobil synthetic. also while im there i plan on doing the differential. what type of fluid do you all use?
Mobil 1, RedLine, and Royal Purple synthetic gear oils are all good choices for the rear. RedLine and Royal Purple already have the limited slip additive in them.
Instructor
Joined: Mar 2007
Posts: 180
Likes: 1
AC Delco filters are a good choice. GM Dexron VI fluid is the latest in the evolution of Dexron ATF's, and is recommended for all GM cars and trucks built since 1949.
Mobil 1, RedLine, and Royal Purple synthetic gear oils are all good choices for the rear. RedLine and Royal Purple already have the limited slip additive in them.
Mobil 1, RedLine, and Royal Purple synthetic gear oils are all good choices for the rear. RedLine and Royal Purple already have the limited slip additive in them.
Le Mans Master
Joined: Nov 2002
Posts: 7,179
Likes: 2
From: Charlotte, NC
im going to change the tranny fluid and filter. i planned on using ac delco filter. is there a better filter to use (k&n ect.) is there a better tranny fluid then mobil synthetic. also while im there i plan on doing the differential. what type of fluid do you all use?
There are alot of good fluids out there... I am very happy with amsoil, that is why I sell it. Their Universal syn.. ATF is great, I had a couple guys with Z06's that were getting trans temp warnings with the stock fluid while racing, so we changed over to amsoil, both said it seems to shift smoother (the shifter that is) and they no longer were getting warnings. That was pretty good proof to me...
Also I use it in my C4, I took it out of the road course with the 2600 stall that is in it beat the hell out of the thing on the track trans temp pegged, and NO trans issues. Which I was shocked because I have rebuilt the trans a few times already due to the heat..
-=Rick
Melting Slicks
Joined: Dec 2003
Posts: 2,857
Likes: 2
From: pawleys island sc
im going to change the tranny fluid and filter. i planned on using ac delco filter. is there a better filter to use (k&n ect.) is there a better tranny fluid then mobil synthetic. also while im there i plan on doing the differential. what type of fluid do you all use?
If you want to "change ALL the trani fluid" you eithert have to take it to a dealer or a transmission shop that has a power flusher. To make sure I'm not BSing you just check the transmission capacity in your owner's mnaual ( I think its somewhere around 14 quarts give or take = I'm too lazy to look it up now). When you change the filter all you can get back into the trani is 3-4 quarts. What about the other 10 or so quarts??
Last edited by 99 vett babycar; Oct 25, 2008 at 11:00 AM.
Le Mans Master
Joined: Nov 2002
Posts: 7,179
Likes: 2
From: Charlotte, NC
Most flush machines have sometime of what I call a bladder system, ect. were one side is fresh fluid the other is the old fluid coming into the machine. Normally, the trans pumps fluid through the cooler and back to the trans. The flush system basically "splices" in the the line so as the old fluid is being pumped out by the trans it forces the NEW fluid back into the trans.
Now some people do this method at home, I don't is can be messy if your not careful and I work at a shop that has a flush machine. Basically disconnect the trans cooler line and run a hose to a bucket.. you can start it up, let it pump it out and shut the engine off right when the fluid starts to airate. do not let it run longer as you will be dry running the pump... somepeople add fluid to the trans while it's running to purge the system. But it's hard to do this on a C5 without someone helping to pump the fluid in ect.. this is the basic idea of it.. but.. this is if you want to be super cheap...
Otherwise take it to a shop with a trans flush machine..
-=Rick
Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
It does say "contains limited slip additive" on the back label.
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Thread Starter
Instructor
Joined: Feb 2007
Posts: 142
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im dont mind spending money on my car, but i dont like leaving it with someone else to work on. i know how i treat my corvette and really doubt that many others would do the same. ive become mechanically adept over the years, stemming from my f-body years. i like the idea of putting fresh fluid in to flush the system. ill do it to my trans am, then try the vette. thanks for the input, im glad to hear that this operation can be performed in my shop (garage)
Melting Slicks
Joined: Oct 2000
Posts: 2,491
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From: prescott AZ
I hate to have others work on my Vettes but did have Chevy totally drain all 15 quarts out of the tranny. Use Mobil 1 synthetic and AC delco filter.
I also used Mobil 1 synthetic in the diff. 1 -800- ASK MOBIL says to add the additive.
I also used Mobil 1 synthetic in the diff. 1 -800- ASK MOBIL says to add the additive.