doing ls1 swap and need help.
Thread Starter
On The Tree
Joined: Mar 2011
Posts: 161
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From: jax, fl
doing ls1 swap and need help. ok so im putting a ls1 in my 07 xrunner. the xrunner rack and pinnion calls for atf fluid and the ls1 pump calls for dot 3 ps fluid. is it ok to put atf fluid in the ps pump on the ls1. i have read that they are almost the same, but the atf fluid is better. or should i go the other way around and use dot 3 fluid in the rack 
TECH Apprentice
Joined: Feb 2011
Posts: 316
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From: Central Florida
I'm not sure, but maybe it wont matter?
When I was a teenager I worked in a service station/gas station and I saw people put all kinds of fluids in the P/S: brake fluid, trans fluid etc. I always wondered why nothing ever blew up.
When I was a teenager I worked in a service station/gas station and I saw people put all kinds of fluids in the P/S: brake fluid, trans fluid etc. I always wondered why nothing ever blew up.
Teching In
Joined: Sep 2006
Posts: 24
Likes: 0
i'd go with the atf. i've always used it on my cars that call for ps fluid. runs cooler.
edit: this has been my personal experience. im not sure if this holds true for all cars. you can always just try out the atf and stick a thermometer in there and see where it goes.
edit: this has been my personal experience. im not sure if this holds true for all cars. you can always just try out the atf and stick a thermometer in there and see where it goes.
ATF III will foam up and vomit all over your engine bay in a Fbody PS pump. Ask me how I know
Still foams up in older PS pumps but doesnt go everywhere, maybe lower pressure, Im not sure. I ended up having to replace both pumps about a month later
Still foams up in older PS pumps but doesnt go everywhere, maybe lower pressure, Im not sure. I ended up having to replace both pumps about a month later
