Changing Automatic Tranmission Fluid
Thread Starter
Advanced
Joined: Oct 2009
Posts: 80
Likes: 3
From: East Longmeadow MA
Changing Automatic Tranmission Fluid
Hello All.
I am going to change the transmission fluid in my 1990 convertible and have a question. When I went to get it the computer said that I can use dexron III or dexron VI. they had VI in stock and that is what I purchased. Read the label after I got home it indicates that this is synthetic. Is it OK to mix the two? I will be draining the pan but the torque converter and cooler will still have III in them.
Thank you for an insight you can provide.
Mike
I am going to change the transmission fluid in my 1990 convertible and have a question. When I went to get it the computer said that I can use dexron III or dexron VI. they had VI in stock and that is what I purchased. Read the label after I got home it indicates that this is synthetic. Is it OK to mix the two? I will be draining the pan but the torque converter and cooler will still have III in them.
Thank you for an insight you can provide.
Mike
Pro
Joined: Oct 2012
Posts: 648
Likes: 6
From: weems va
Hello All.
I am going to change the transmission fluid in my 1990 convertible and have a question. When I went to get it the computer said that I can use dexron III or dexron VI. they had VI in stock and that is what I purchased. Read the label after I got home it indicates that this is synthetic. Is it OK to mix the two? I will be draining the pan but the torque converter and cooler will still have III in them.
Thank you for an insight you can provide.
Mike
I am going to change the transmission fluid in my 1990 convertible and have a question. When I went to get it the computer said that I can use dexron III or dexron VI. they had VI in stock and that is what I purchased. Read the label after I got home it indicates that this is synthetic. Is it OK to mix the two? I will be draining the pan but the torque converter and cooler will still have III in them.
Thank you for an insight you can provide.
Mike
Drifting
Joined: Mar 2012
Posts: 1,492
Likes: 61
From: New Jersey
You can use synthetics in your transmission. Dex VI is supposed to lower viscosity ("thinner") fluid than Dex III. But it is supposed to be backwards compatible and should work just fine for your trans.
You can also use Mobil1 synthetic which is a very good trans fluid and is Dex III compatible. Amazon has a 6 qt. case for a little cheaper with free shipping -
And you can also use Mag1 synthetic. I have used it in my '94 F150 and will probably use it in the vette. Plus the price is much cheaper than Mobil1 and it has gotten very good reviews on Amazon and elsewhere -
For even less money you can get Mag1 Dex VI compatible synthetic -
All three are very good and should work just fine in your trans.
You can also use Mobil1 synthetic which is a very good trans fluid and is Dex III compatible. Amazon has a 6 qt. case for a little cheaper with free shipping -
And you can also use Mag1 synthetic. I have used it in my '94 F150 and will probably use it in the vette. Plus the price is much cheaper than Mobil1 and it has gotten very good reviews on Amazon and elsewhere -
For even less money you can get Mag1 Dex VI compatible synthetic -
All three are very good and should work just fine in your trans.
Racer
Joined: Jan 2014
Posts: 324
Likes: 7
From: Littleton Colorado
Dexron III is no longer licensed. It may still be available from various suppliers, but you're basically on your own now.
Melting Slicks
Joined: Nov 2010
Posts: 2,216
Likes: 112
From: Michigan
Just did my fluid, filter and pan a few weeks ago and used VI, you can change most the fluid. I bought about 7' of clear line at my local hardware store and used a gallon jug. Couple other notes are I shut it off when I saw air in the line at half the jug and if you have to walk away while your doing it the fluid may syphon(I came back to a full jug when I shut it off art half). I was putting a extra cooler on so I had to unhook the correct line anyway. Pan torque is 12 ft-lb
Good directions here post #6 from 383vette
http://forums.corvetteforum.com/c4-t...d-at-home.html
What line is what post #2
http://forums.corvetteforum.com/c4-t...es-in-out.html
Good directions here post #6 from 383vette
http://forums.corvetteforum.com/c4-t...d-at-home.html
What line is what post #2
http://forums.corvetteforum.com/c4-t...es-in-out.html
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