synthetic trans. fluid
Thread Starter
On The Tree
Joined: Jun 2006
Posts: 199
Likes: 0
From: La.
synthetic trans. fluid Who makes the best performing synthetic auto. trans. fluid on the market ?Also using factory thermostat [197 degree], is it best to by-pass the radiator cooler & pipe directly to & from the trans ? Also I'm still useing the stock converter . 
TECH Fanatic
Joined: Oct 2003
Posts: 1,132
Likes: 0
From: Grand Rapids, Michigan
I believe the only one people have success with is Royal Purple, but 95% of the people here will tell you to stick with dexron III. Do a search, this comes up atleast once a week!!!!!
Thread Starter
On The Tree
Joined: Jun 2006
Posts: 199
Likes: 0
From: La.
Well , I just read a report on general motors new DEXTRON VI synthetic blend auto trans. fluid that is to replace all other dextron in all years of GM vehicles. Cost about $4.85 per quart. My dealer now has it in stock. I will be power flushing my trans. & watching the clear return lines until they turn a bright & beautiful red. Then we'll replace the pan & gasket with B & M's alum. finned deep pan with of course a brand new filter. Then we will re-route the pressure & return lines to by pass the radiator cooler directly to the B & M 24,000 lbs. plate cooler mounted horizontally under the front facia on the passenger side & of course double clamp all lines. VIOLA, done.
Originally Posted by ls1wfo
Well , I just read a report on general motors new DEXTRON VI synthetic blend auto trans. fluid that is to replace all other dextron in all years of GM vehicles. Cost about $4.85 per quart. My dealer now has it in stock. I will be power flushing my trans. & watching the clear return lines until they turn a bright & beautiful red. Then we'll replace the pan & gasket with B & M's alum. finned deep pan with of course a brand new filter. Then we will re-route the pressure & return lines to by pass the radiator cooler directly to the B & M 24,000 lbs. plate cooler mounted horizontally under the front facia on the passenger side & of course double clamp all lines. VIOLA, done.
Originally Posted by slimcracka
synthetic fluid is a BIG no no in 4l60e (or any auto trans) the fluid is too slippery and causes the clutches to slip....im sure more will chim in and tell you the same!
cheap dextron/mercon works better than any.
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