# Which fluid to use in automatic transmission fluid? **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** transmissions, lincoln\ **Created:** [January 4, 2017, 3:44am UTC](https://community.cartalk.com/t/which-fluid-to-use-in-automatic-transmission-fluid/98054 "2017-01-04T03:44:00Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![hwalk](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/hwalk/32/4906_2.png) [@hwalk](https://community.cartalk.com/u/hwalk)\ **Post date:** [January 4, 2017, 3:44am UTC](https://community.cartalk.com/t/which-fluid-to-use-in-automatic-transmission-fluid/98054/1 "2017-01-04T03:44:00Z")
My 1976 Lincoln Mark IV has a 3-speed C6 transmission. According to the manual, it should use Type F fluid (which seems relatively hard to find), however the Haynes manual says to use Mercon. From what I’ve read, Mercon fluid is no longer made, but I believe I read that Mercon V works in place of Mercon? And, if so, it would work in my transmission? Thanks! ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [January 4, 2017, 3:57am UTC](https://community.cartalk.com/t/which-fluid-to-use-in-automatic-transmission-fluid/98054/2 "2017-01-04T03:57:48Z")
The latest Mercon fluid will work in the transmission. Just make sure all the type F fluid is removed before introducing the Mercon. Tester ---
**Author:** ![hwalk](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/hwalk/32/4906_2.png) [@hwalk](https://community.cartalk.com/u/hwalk)\ **Post date:** [January 4, 2017, 4:53am UTC](https://community.cartalk.com/t/which-fluid-to-use-in-automatic-transmission-fluid/98054/3 "2017-01-04T04:53:49Z")
@Tester So does that mean I would need to flush the transmission fluid rather than just changing it then? ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [January 4, 2017, 5:18am UTC](https://community.cartalk.com/t/which-fluid-to-use-in-automatic-transmission-fluid/98054/4 "2017-01-04T05:18:08Z")
Not sure where you live, but Type F is easily obtainable in my area Personally, I’d use Type F, since that’s what the manual calls for FWIW . . . over the years, I’ve seen a few discrepancies between owner’s manual and factory service manual, versus what Haynes says Actually Mercon is still made, lots of different Mercons, in fact ---
**Author:** ![monkarl](https://avatars.discourse-cdn.com/v4/letter/m/919ad9/32.png) [@monkarl](https://community.cartalk.com/u/monkarl)\ **Post date:** [January 4, 2017, 9:39am UTC](https://community.cartalk.com/t/which-fluid-to-use-in-automatic-transmission-fluid/98054/5 "2017-01-04T09:39:49Z")
I know Amsoil and Royal Purple has products compatible with Type F. ---
**Author:** ![lion9car](https://avatars.discourse-cdn.com/v4/letter/l/59ef9b/32.png) [@lion9car](https://community.cartalk.com/u/lion9car)\ **Post date:** [January 4, 2017, 2:02pm UTC](https://community.cartalk.com/t/which-fluid-to-use-in-automatic-transmission-fluid/98054/6 "2017-01-04T14:02:05Z")
I see Motorcraft Type F on Amazon. It’s a little expensive, but that’s one very safe way to go here. ---
**Author:** ![OldcarsRbest](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/oldcarsrbest/32/4812_2.png) [@OldcarsRbest](https://community.cartalk.com/u/OldcarsRbest)\ **Post date:** [January 4, 2017, 2:02pm UTC](https://community.cartalk.com/t/which-fluid-to-use-in-automatic-transmission-fluid/98054/7 "2017-01-04T14:02:22Z")
I just typed ‘type f’ fluid in fleabay-Motorcraft, pennzoil, valvoline, after market brands available. If your local auto parts store doesn’t stock one, check their website - if it’s on there, you can have your local order it in for you. ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [January 4, 2017, 4:41pm UTC](https://community.cartalk.com/t/which-fluid-to-use-in-automatic-transmission-fluid/98054/8 "2017-01-04T16:41:44Z")
Autozone shows two Type F fluids available, including STP Type F in stock near me for $5/qt. That’s what I’d get. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [January 5, 2017, 1:45am UTC](https://community.cartalk.com/t/which-fluid-to-use-in-automatic-transmission-fluid/98054/9 "2017-01-05T01:45:31Z")
all of my local parts stores have Type F . . . usually the house brand, in stock, and for a reasonable price I’m not terribly surprised, because there are a lot of beat up old Ford trucks still in use ---
**Author:** ![hwalk](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/hwalk/32/4906_2.png) [@hwalk](https://community.cartalk.com/u/hwalk)\ **Post date:** [January 5, 2017, 1:53am UTC](https://community.cartalk.com/t/which-fluid-to-use-in-automatic-transmission-fluid/98054/10 "2017-01-05T01:53:14Z")
Thanks everyone. It could be that my local stores just aren’t great at updating their online stock. I’ll check in a few and see what I can find! ---
**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\ **Post date:** [January 5, 2017, 3:26am UTC](https://community.cartalk.com/t/which-fluid-to-use-in-automatic-transmission-fluid/98054/11 "2017-01-05T03:26:37Z")
Type F is extremely common in my area too, even at the big-box stores. I recommend using only what the owner’s manual says. ---
**Author:** ![OldcarsRbest](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/oldcarsrbest/32/4812_2.png) [@OldcarsRbest](https://community.cartalk.com/u/OldcarsRbest)\ **Post date:** [January 5, 2017, 5:07pm UTC](https://community.cartalk.com/t/which-fluid-to-use-in-automatic-transmission-fluid/98054/12 "2017-01-05T17:07:53Z")
I assume you are dropping the pan and changing the filter and gasket? A little trick on pan gaskets - they come all folded up in a box, and will not stay in place while you are laying there at your wits end wondering why you ever started this - take some short pieces of sewing thread and tie the gasket in place at several bolt holes of the pan; as you work your way around, put your bolt in each hole and then snip the thread and remove it. ---
**Author:** ![hwalk](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/hwalk/32/4906_2.png) [@hwalk](https://community.cartalk.com/u/hwalk)\ **Post date:** [January 6, 2017, 1:57am UTC](https://community.cartalk.com/t/which-fluid-to-use-in-automatic-transmission-fluid/98054/13 "2017-01-06T01:57:08Z")
@OldcarsRbest I am. Thanks for the tip!