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4L60E and Royal Purple ATF

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Old Feb 27, 2006 | 12:54 PM
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Question 4L60E and Royal Purple ATF

Has anyone heard any bad things happening or contraindications to using synthetic tranny fluid or royal purple in the 4L60E or any electronic GM transmission?

I just bought 12 quarts of Royal Purple for my trans filter change and TC install...and someone on another site said that the synthetic will make my bands slip of some sh*t.

Any thoughts or experience will be very appreciated.
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Old Feb 27, 2006 | 11:45 PM
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I have used it in my last 2 previous camaros i have owned . And currently run it in my New camaro Now. I have never had any problems with anyof them. fluid allways looked Fresh as the day i put it in. All 3 were A4.
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Old Feb 28, 2006 | 02:00 AM
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Chuck @ FLT (who built my new trans) said I should use Dexron III. He didn't really say anything bad about synthetics other than they don't really like them.
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Old Feb 28, 2006 | 08:52 AM
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thanks for the input
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Old Feb 28, 2006 | 05:26 PM
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I have royal purple in my transmission, I am gonna flush it out. After i put it in I did a couple of WOT shifts while the car was still a little cold and and it slipped on the 1-2 shift. It only did this two times, so not 100% sure if it is the fluid or what. Just my .02
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Old Mar 1, 2006 | 02:07 PM
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I have had Royal Purple in my Trans and never had any issues with it....

Seems to work well for me.
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Old Mar 1, 2006 | 02:41 PM
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Its good stuff. It might void the GM warranty though.
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Old Mar 1, 2006 | 06:14 PM
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Originally Posted by SScottie
Its good stuff. It might void the GM warranty though.
My warranty has been out since June...
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Old Mar 3, 2006 | 05:55 PM
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Most builders do not like synthetic trans fluids because they are usually too "slippery" and can cause the clutches in the transmission to slip and burn up.
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Old Mar 3, 2006 | 06:36 PM
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I used it in mine with no problems
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Old Mar 3, 2006 | 06:46 PM
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My trans builder doesn't like synthetic fluid either, but he did tell me to use Castro type F, so that's what I've been using

Last edited by Drew778; Mar 3, 2006 at 08:20 PM.
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Old Mar 3, 2006 | 07:25 PM
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i would agree i was told by a number of tranny builders and one that works for Gm that you should only use dex..III none of that fancy stuff..i would take taht expensive stuff back and just get some ole regular shyt.
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Old Mar 3, 2006 | 10:09 PM
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dextron III or higher as i posted on RP. (stage20)
syn oil in a 4l60 is asking for trouble if you beat on it.
its not good for it shifting regularly.
time bomb.
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Old Mar 4, 2006 | 10:04 AM
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Originally Posted by maddboost
Most builders do not like synthetic trans fluids because they are usually too "slippery" and can cause the clutches in the transmission to slip and burn up.

Yank told me the same thing.
Ed
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Old Mar 4, 2006 | 07:26 PM
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Originally Posted by maddboost
Most builders do not like synthetic trans fluids because they are usually too "slippery" and can cause the clutches in the transmission to slip and burn up.

Dexton-III is OEM and works just fine.
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