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View Full Version : Top fluid question..

LS1 Trans am
02-04-2007, 04:33 PM
What kind of fluid do you put in the pump for the convertible top? I was thinking hydraulic, or transmission fluid? Hope somebody knows, mine is getting low.
Hotwheels Camaro
02-04-2007, 11:45 PM
Use Mineral Oil. I haven't had a problem with it yet.
charlesss
02-05-2007, 09:11 AM
wheres the pump located to check the fluid
Eugenio_SS
02-05-2007, 04:59 PM
wheres the pump located to check the fluid

opposite side of the spare tire. you'll find a little opening... pull on the trap door and you have access to the hydraulics.
charlesss
02-05-2007, 05:54 PM
opposite side of the spare tire. you'll find a little opening... pull on the trap door and you have access to the hydraulics.

Thanks.. I knever new they had to be topped up
LS1 Trans am
02-05-2007, 06:38 PM
Mineral oil? WTF is that? You sure that is what to use, and where do I get that at?

Use Mineral Oil. I haven't had a problem with it yet.
LS1Z28
02-05-2007, 07:08 PM
Mineral oil? WTF is that? You sure that is what to use, and where do I get that at?

Any supermarket or drug store. GM changed to mineral oil because the hydraulic fluid was eating the seals. I've had it in my car since 1999 with no problems to date.
JohnnyBs98WS6Rag
02-06-2007, 08:14 AM
Any supermarket or drug store. GM changed to mineral oil because the hydraulic fluid was eating the seals. I've had it in my car since 1999 with no problems to date.

Correct. Mineral oil is used as a laxative, you'll find it next to ExLax. :ughlaugh:

I've switched to mineral oil too, but I've yet to see anything "official" from GM in writing that states this, so I'm going off of the trust I have for my fellow LS1.com'ers. :)
LS1 Trans am
02-06-2007, 05:46 PM
If you guys say so.. So should I drain what fluid is in there and put straight mineral oil in or not and If so How do I drain it? Thanks guys..
JohnnyBs98WS6Rag
02-12-2007, 06:33 AM
If you guys say so.. So should I drain what fluid is in there and put straight mineral oil in or not and If so How do I drain it? Thanks guys..

Well, to get ALL of the old fluid out so that you have a 100% mineral oil fill, you'd probably have to disconnect all the hoses, blow them out and manually cycle the cylinders. This sounds difficult and messy, probably not worth it. I just topped off my fluid w/ mineral oil and left what was left of the old stuff (probably Dextron III) in there. Mine still has a slow leak, so the mineral oil didn't help or hurt that, but at least the pump and cylinders are still fine, just need to keep it topped off.