A4 fluid swap - CorvetteForum - Chevrolet Corvette Forum Discussion



C5 General
General C5 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

A4 fluid swap

Reply
 
 
 
Thread Tools Search this Thread
Old 07-17-2017, 11:25 AM   #1
DonsC5
CF Senior Member
Thread Starter
 
Member Since: Feb 2009
Location: Portland Maine
Posts: 171
Thanked 2 Times in 2 Posts
Default A4 fluid swap

Hi guys,

Is there a procedure when changing the A4 fluid to give you the ability to drain ALL of the fluid out safely? Including the torque converter? I want to accomplish this WITHOUT doing a transmission "power flush" I've heard bad things about pressurizing the system like that.

The Transmission fluid currently has almost 50,000 miles on it and I wish to replace it all. including the fluid in the converter. Is it possible?

Any help would be great!

Don
DonsC5 is offline   Reply With Quote
Old 07-17-2017, 03:15 PM   #2
ArtClassShank
CF Senior Member
 
ArtClassShank's Avatar
 
Member Since: Apr 2017
Location: Hanover Maryland
Posts: 107
Thanked 12 Times in 10 Posts
Default

IMO, if it's not acting up, don't bother.
ArtClassShank is online now   Reply With Quote
Old 07-17-2017, 03:52 PM   #3
DonsC5
CF Senior Member
Thread Starter
 
Member Since: Feb 2009
Location: Portland Maine
Posts: 171
Thanked 2 Times in 2 Posts
Default

Quote:
Originally Posted by ArtClassShank View Post
IMO, if it's not acting up, don't bother.
Do we not change engine oil at a specific allotted time or miles? Even if it is not "acting up"?
DonsC5 is offline   Reply With Quote
Old 07-17-2017, 04:04 PM   #4
JR-01
CF Senior Member
 
JR-01's Avatar
 
Member Since: Sep 2013
Posts: 6,576
Thanked 401 Times in 317 Posts
Default

Quote:
Originally Posted by DonsC5 View Post
Do we not change engine oil at a specific allotted time or miles? Even if it is not "acting up"?
Engine oil is exposed to a lot more extreme conditions than transmission fluid. The GM tech told me at 70K that mine did not really need to be changed as long as it shifted good and I did not have any problems. I changed it anyway. It's all up to you. Might be good for it and might not.
JR-01 is offline   Reply With Quote
Old 07-18-2017, 08:29 AM   #5
DonsC5
CF Senior Member
Thread Starter
 
Member Since: Feb 2009
Location: Portland Maine
Posts: 171
Thanked 2 Times in 2 Posts
Default

ttt....

I know someone here can help me with my question?..........
DonsC5 is offline   Reply With Quote
Old 07-18-2017, 08:58 AM   #6
Weck86
CF Senior Member
 
Weck86's Avatar
 
Member Since: Jan 2012
Location: Hill Country TX
Posts: 298
Thanked 49 Times in 47 Posts
Default

I need to check and see the difficulty factor on this for a C5, but the basic procedure is this. Locate the transmission cooling lines. The 'upper/top' line is generally the out line from the transmission. Disconnect this line and attach additional tubing so you can route it to a 5 gallon bucket. Have on hand the correct amount of trans fluid for a complete change, check owners manual or FSM if you have one. Start car and trans will pump fluid into bucket. Keep adding fluid to trans during this process until all fluid has been exchanged.
I just recently acquired my C5 and sadly can't visualize ,as I type this, if it does in fact have a transmission dip stick. For my procedure to work you have to be able to add fluid thru the dip stick tube. It worked fine on my C4.
Weck86 is offline   Reply With Quote
Old 07-18-2017, 09:00 AM   #7
Yello95
CF Senior Member
Support Corvetteforum!
St. Jude Donor '11
 
Yello95's Avatar
 
Member Since: May 2001
Location: on the peninsula Virginia
Posts: 20,747
Thanked 80 Times in 56 Posts
Default

Quote:
Originally Posted by DonsC5 View Post
ttt....

I know someone here can help me with my question?..........

Many know the real answer...do a search on the forum, I'm sure the question has come up lot of times...
Yello95 is online now   Reply With Quote
Old 07-18-2017, 09:20 AM   #8
JR-01
CF Senior Member
 
JR-01's Avatar
 
Member Since: Sep 2013
Posts: 6,576
Thanked 401 Times in 317 Posts
Default

Quote:
Originally Posted by Weck86 View Post
I need to check and see the difficulty factor on this for a C5, but the basic procedure is this. Locate the transmission cooling lines. The 'upper/top' line is generally the out line from the transmission. Disconnect this line and attach additional tubing so you can route it to a 5 gallon bucket. Have on hand the correct amount of trans fluid for a complete change, check owners manual or FSM if you have one. Start car and trans will pump fluid into bucket. Keep adding fluid to trans during this process until all fluid has been exchanged.
I just recently acquired my C5 and sadly can't visualize ,as I type this, if it does in fact have a transmission dip stick. For my procedure to work you have to be able to add fluid thru the dip stick tube. It worked fine on my C4.
There is no tranny dipstick on a C5.
JR-01 is offline   Reply With Quote
Old 07-18-2017, 09:50 AM   #9
DonsC5
CF Senior Member
Thread Starter
 
Member Since: Feb 2009
Location: Portland Maine
Posts: 171
Thanked 2 Times in 2 Posts
Default

Quote:
Originally Posted by Yello95 View Post
Many know the real answer...do a search on the forum, I'm sure the question has come up lot of times...
I tried a search before I decided to post a thread... I may not have put in the right key words to the search.
DonsC5 is offline   Reply With Quote
Old 07-18-2017, 11:37 AM   #10
Weck86
CF Senior Member
 
Weck86's Avatar
 
Member Since: Jan 2012
Location: Hill Country TX
Posts: 298
Thanked 49 Times in 47 Posts
Default

Quote:
Originally Posted by JR-01 View Post
There is no tranny dipstick on a C5.
Figures. No wonder I had trouble remembering. I lazed out on my C5 and took it to an 'indy' shop I trust and had all the fluids changed when I purchased it. So I guess my advice was worth what it cost, nothing.
Weck86 is offline   Reply With Quote
Old 07-18-2017, 12:06 PM   #11
Yello95
CF Senior Member
Support Corvetteforum!
St. Jude Donor '11
 
Yello95's Avatar
 
Member Since: May 2001
Location: on the peninsula Virginia
Posts: 20,747
Thanked 80 Times in 56 Posts
Default

Quote:
Originally Posted by DonsC5 View Post
I tried a search before I decided to post a thread... I may not have put in the right key words to the search.
ok so now its time to call in one of the c5 specialist engineers...Start with Evil-Twin...he knows the answer...then you don't have to go searching for your answer again
Yello95 is online now   Reply With Quote
The Following User Says Thank You to Yello95 For This Useful Post:
DonsC5 (07-18-2017)
Old 07-18-2017, 12:07 PM   #12
Yello95
CF Senior Member
Support Corvetteforum!
St. Jude Donor '11
 
Yello95's Avatar
 
Member Since: May 2001
Location: on the peninsula Virginia
Posts: 20,747
Thanked 80 Times in 56 Posts
Default

Quote:
Originally Posted by JR-01 View Post
There is no tranny dipsticks on a C5.
...but there are many on this forum...
Yello95 is online now   Reply With Quote
The Following User Says Thank You to Yello95 For This Useful Post:
DonsC5 (07-18-2017)
Old 07-18-2017, 01:27 PM   #13
DonsC5
CF Senior Member
Thread Starter
 
Member Since: Feb 2009
Location: Portland Maine
Posts: 171
Thanked 2 Times in 2 Posts
Default

I would love to be pointed in the right direction. By Evil-Twin or any other expert

DonsC5 is offline   Reply With Quote
Old 07-18-2017, 03:41 PM   #14
jim993
CF Senior Member
 
jim993's Avatar
 
Member Since: Sep 2009
Location: Arroyo Grande California
Posts: 490
Thanks: 0
Thanked 21 Times in 21 Posts
Default

Changing the fluid and filter on a C5 A4 is fairly easy, but there are specific procedures to insure that the fluid level is correct after the change:

After replacing the filter and bolting the pan back up, fill with new fluid to the drain/ check level plug hole. Then start the engine and leave it running with the transmission in PARK.

Immediately add fluid through the drain/ check level plug hole until fluid flows out of the plug hole. It may take as much as another couple of quarts.

With your foot holding the brakes, cycle the transmission through all the gears, then back to PARK.

Go back underneath and make sure that fluid is still dribbling out of the fill/ check level plug hole. You might have to add some.

With the engine still running and the transmission in PARK, monitor transmission temperature on the DIC. When transmission temperature rises to 122 F, put the plug in the fill/ Check level hole. Keep a pan under the hole, fluid will dribble out as the transmission temperature rises.

Do NOT shut the engine down until the plug is in the fill/ check level hole. If you do, HOT fluid will gush out and the transmission will be low on fluid.

I recommend full synthetic fluid.

Keep in mind that the above procedure drains about half the fluid in the A4. The other half is in the torque converter and other works.

You will need a small hand pump to pump the fluid into the fill/ check level hole.
jim993 is offline   Reply With Quote
The Following User Says Thank You to jim993 For This Useful Post:
DonsC5 (07-18-2017)
Old 07-18-2017, 04:03 PM   #15
DonsC5
CF Senior Member
Thread Starter
 
Member Since: Feb 2009
Location: Portland Maine
Posts: 171
Thanked 2 Times in 2 Posts
Default

Quote:
Originally Posted by jim993 View Post
Changing the fluid and filter on a C5 A4 is fairly easy, but there are specific procedures to insure that the fluid level is correct after the change:

After replacing the filter and bolting the pan back up, fill with new fluid to the drain/ check level plug hole. Then start the engine and leave it running with the transmission in PARK.

Immediately add fluid through the drain/ check level plug hole until fluid flows out of the plug hole. It may take as much as another couple of quarts.

With your foot holding the brakes, cycle the transmission through all the gears, then back to PARK.

Go back underneath and make sure that fluid is still dribbling out of the fill/ check level plug hole. You might have to add some.

With the engine still running and the transmission in PARK, monitor transmission temperature on the DIC. When transmission temperature rises to 122 F, put the plug in the fill/ Check level hole. Keep a pan under the hole, fluid will dribble out as the transmission temperature rises.

Do NOT shut the engine down until the plug is in the fill/ check level hole. If you do, HOT fluid will gush out and the transmission will be low on fluid.

I recommend full synthetic fluid.

Keep in mind that the above procedure drains about half the fluid in the A4. The other half is in the torque converter and other works.

You will need a small hand pump to pump the fluid into the fill/ check level hole.
Thank you Jim. my original question is how to SAFELY get ALL the fluid out... torque converter and all? is there such a step by step process for that?
DonsC5 is offline   Reply With Quote
Old 07-18-2017, 07:25 PM   #16
jim993
CF Senior Member
 
jim993's Avatar
 
Member Since: Sep 2009
Location: Arroyo Grande California
Posts: 490
Thanks: 0
Thanked 21 Times in 21 Posts
Default

I have not been able to find a step by step process to exchange all the fluid in the A4 stated in the FSM.

I am not sure how to be certain that ALL the fluid is changed, even with a pressure flush. According to the FSM where DTC P0218 is discussed (HI TRANS TEMP), hot fluid exiting the torque converter flows to the cooler in the radiator then to the front of the transmission to lubricate and cool the front of the transmission. Meanwhile, fluid from the main pump is flowing to other parts of the transmission for various other functions and cooling.

My take is that the cooler circuit does not necessarily exchange 100% of the fluid flowing in the transmission in one pass, or that if one were to flush the total volume of fluid held in the transmission, not all of that fluid would have gone through the torque converter.

Maybe someone with more intimate knowledge of the A4 could weigh in.

My own solution to the problem was to initially change fluid and filter twice, about six months apart.

Because I track my car, I also change my A4 fluid and filter after every six track days, a total of four changes so far. My fluid of choice is Red Line D4 full synthetic ATF.
jim993 is offline   Reply With Quote
The Following User Says Thank You to jim993 For This Useful Post:
DonsC5 (07-19-2017)
Old 07-19-2017, 10:24 AM   #17
DonsC5
CF Senior Member
Thread Starter
 
Member Since: Feb 2009
Location: Portland Maine
Posts: 171
Thanked 2 Times in 2 Posts
Default

Quote:
Originally Posted by jim993 View Post
I have not been able to find a step by step process to exchange all the fluid in the A4 stated in the FSM.

I am not sure how to be certain that ALL the fluid is changed, even with a pressure flush. According to the FSM where DTC P0218 is discussed (HI TRANS TEMP), hot fluid exiting the torque converter flows to the cooler in the radiator then to the front of the transmission to lubricate and cool the front of the transmission. Meanwhile, fluid from the main pump is flowing to other parts of the transmission for various other functions and cooling.

My take is that the cooler circuit does not necessarily exchange 100% of the fluid flowing in the transmission in one pass, or that if one were to flush the total volume of fluid held in the transmission, not all of that fluid would have gone through the torque converter.

Maybe someone with more intimate knowledge of the A4 could weigh in.

My own solution to the problem was to initially change fluid and filter twice, about six months apart.

Because I track my car, I also change my A4 fluid and filter after every six track days, a total of four changes so far. My fluid of choice is Red Line D4 full synthetic ATF.
Thank you for your answer Jim. I guess the only real answer is to change the fluid from the pan multiple times in a relatively short period of time. Unless an A4 expert would like to weigh in?
DonsC5 is offline   Reply With Quote
Go Back   CorvetteForum - Chevrolet Corvette Forum Discussion >
Reload this Page
  • A4 fluid swap
  •  
     
    Reply

    Related Topics
    Thread Thread Starter Forum Replies Last Post
    question regarding GM dealer oil change kharouf C6 Corvette General Discussion 6 06-22-2017 07:07 PM
    [Z06] Recommended Fluid Change Schedule. DaOtherOne C6 Corvette ZR1 & Z06 5 09-01-2016 12:11 PM
    Automatic Fluid/Filter and Rear Differential Fluid Change tkgo15 C5 Tech 21 07-13-2016 06:30 PM
    Where is A4 Fluid Temperature ingalls71 C5 Tech 9 10-15-2015 10:44 AM
    Service Traction Control/ABS after differential and transmission fluid change??? dtorc4 C5 Tech 7 01-13-2015 01:17 PM


    Thread Tools Search this Thread
    Search this Thread:

    Click for Advanced Search

    Posting Rules
    You may not post new threads
    You may not post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are Off
    Pingbacks are Off
    Refbacks are Off

    Forum Jump


    All times are GMT -4. The time now is 02:53 PM.


     
    • Ask a Question
      Get answers from community experts
    Question Title:
    Description:
    Your question will be posted in: