Best Fluid type on 4L60E
I have seen some people swear by synthetic and others not, I'm not quite sure which one to pick and I would like to swap out the transmission fluid.
The car has about 114k miles (mainly highway) and I'm not sure if the guy ever changed the fluid... :/ Shifts perfectly tho.
And I plan on just dropping the pan, also know of any walkthroughs of dropping the pan and what to look for?
Thanks
I went to GM to get fluid when I did my ss3600 and the tech told me GM switched it all to dex 6 so thats what I have in there.
There seems to be some confusion if its a synthetic mix though. It didnt say on the jugs. All I know is on the Yank card they sent with the verter says dex 6 is ok to use.
You can still get dex3 at auto stores though. I pretty sure non synthetic is recomended.
Theres a few pics on my install thread that might help a little.
https://ls1tech.com/forums/automatic...ll-thread.html
http://www.imakenews.com/lng/e_article000384801.cfm
There is technically no more "Dex III" labling, as GM no longer licenses this. What used to be labled as Dex III is now typically sold under the generic name "Dex/Merc".
Also thanks for that thread senicalj4579, that definitely gave me an idea of what I need to do.
One last quick question because the search isn't giving me any results, how much fluid should I put in after I put the pan back on there?
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My book says 5qts for a pan and filter change but mine took more like 4 IIRC.
If your talking the full trans...I put like 10qts in.
https://ls1tech.com/forums/8963714-post4.html
https://ls1tech.com/forums/automatic...lter-swap.html
I changed the seal the first time, but not the next 5-6 times
Johnny












