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Type F instead? #73409 06/14/08 12:28 AM 06/14/08 12:28 AM
Joined: Sep 2005 Posts: 1,202 California P polkat OP mopar addict
polkat OP mopar addict P Joined: Sep 2005 Posts: 1,202 California	I have read that using Type F fluid (instead of Dexron) in torqueflites will slightly improve the firmness of shifts. Can anyone verify this? Thanks!

Re: Type F instead? [Re: polkat] #73410 06/14/08 12:39 AM 06/14/08 12:39 AM
Joined: Oct 2004 Posts: 8,165 Left Coast B BobR master
BobR master B Joined: Oct 2004 Posts: 8,165 Left Coast	Quote: I have read that using Type F fluid (instead of Dexron) in torqueflites will slightly improve the firmness of shifts. Can anyone verify this? Thanks! What year transmission? May not want to do that with a late model. For the older stuff this is a known shift improver-but don't expect miracles. -Bob

Re: Type F instead? [Re: BobR] #73411 06/14/08 12:49 AM 06/14/08 12:49 AM
Joined: Sep 2005 Posts: 1,202 California P polkat OP mopar addict
polkat OP mopar addict P Joined: Sep 2005 Posts: 1,202 California	It's an older 904. It's been running Dexron, but I just now read an article that said if you were running Dexron, you have to completely flush the tranny as adding Type F will make a jelly-like messif there is any Dexron still in the tranny. Glad I read this as the tranny is still in the car. Or, is there any truth to this?

Re: Type F instead? [Re: polkat] #73412 06/14/08 01:28 AM 06/14/08 01:28 AM
Joined: Jun 2004 Posts: 3,319 Chicago Burbs sthemi master
sthemi master Joined: Jun 2004 Posts: 3,319 Chicago Burbs	You should not mix the different types of fluid. The changeover is best when the tranny is fresh from the rebuilder and NO Dextron is in it. It does firm up shifts. The safest bet is fresh Dextron and a new filter. Video Little Red Wagon Indy Nats,BurnoutContest

Re: Type F instead? [Re: sthemi] #73413 06/14/08 03:46 AM 06/14/08 03:46 AM
Joined: May 2008 Posts: 5,399 Aurora, Colorado 451Mopar master
451Mopar master Joined: May 2008 Posts: 5,399 Aurora, Colorado	The old 904/727 are really forgiving on what fluids were in them. Back in the 80's Chrysler power Magazine ran some 727 hop-up articles by (I believe) Marv Booth who would run type-F for the friction, and add a quart or two of straight 30w (non-detergent) motor oil for lubrication.

Re: Type F instead? [Re: 451Mopar] #73414 06/14/08 08:05 AM 06/14/08 08:05 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	yes type F gives a slightly firmer shift but since you are up & running there's no way for you to change now without ending up mixing the 2 if mixing them would cause major problems. I remember those marv booth "the mad scientist" chrysler power articles & might still have one or 2 of them. I tried adding a qt or 2 of eng oil to the trans at that time. The trans didn't act any better but me thinking that I was helping my trans by giving it better "lubrication" made ME feel better. live every 24 hour block of time like it's your last day on earth

Re: Type F instead? [Re: RapidRobert] #73415 06/14/08 08:44 AM 06/14/08 08:44 AM
Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN R Rug_Trucker I Live Here
Rug_Trucker I Live Here R Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN	I did it on my B back in 78. Pulled the drain on the converter, and pan/filter. I didn't have a problem. 727 in my van has had type F in it since rebuild. Over 100K on it. Never heard the "jelly" thing. "The only thing to do for triumph of evil is for good men to do nothing" "NUNQUAM NON PARATUS!"

Re: Type F instead? [Re: polkat] #73416 06/14/08 06:19 PM 06/14/08 06:19 PM
Joined: Jan 2003 Posts: 25,714 Rio Linda, CA John_Kunkel Too Many Posts
John_Kunkel Too Many Posts Joined: Jan 2003 Posts: 25,714 Rio Linda, CA	Quote: It's been running Dexron, but I just now read an article that said if you were running Dexron, you have to completely flush the tranny as adding Type F will make a jelly-like messif there is any Dexron still in the tranny. Total nonsense!!! My favorite brew is a 50/50 mix of Dexron and type F. All transmission fluid types can be mixed with no ill result in the fluid itself. The INTERNET, the MISinformation superhighway

Re: Type F instead? [Re: John_Kunkel] #73417 06/14/08 06:43 PM 06/14/08 06:43 PM
Joined: Nov 2004 Posts: 25,050 Texas GoodysGotaCuda 5.7L Hemi, 6spd
GoodysGotaCuda 5.7L Hemi, 6spd Joined: Nov 2004 Posts: 25,050 Texas	Quote: Quote: It's been running Dexron, but I just now read an article that said if you were running Dexron, you have to completely flush the tranny as adding Type F will make a jelly-like messif there is any Dexron still in the tranny. Total nonsense!!! My favorite brew is a 50/50 mix of Dexron and type F. All transmission fluid types can be mixed with no ill result in the fluid itself. Same here, I had a converter full of Dexron when I went Type F, no Tranny Jelly here 1972 Barracuda - 5.7L Hemi, T56 Magnum 6spd - https://www.facebook.com/GoodysGotaHemi 2020 RAM 1500 [img]https://i.imgur.com/v9yezP9.jpg[/img]

Re: Type F instead? [Re: GoodysGotaCuda] #73418 06/14/08 06:48 PM 06/14/08 06:48 PM
Joined: Sep 2005 Posts: 1,202 California P polkat OP mopar addict
polkat OP mopar addict P Joined: Sep 2005 Posts: 1,202 California	In the end I did exactly what John mentioned. A 50/50 mix, and the tranny runs nicely! While doing this, I adjusted the bands (both) and the flair I mentioned in an earlier post is gone. Good deal all the way around.

Re: Type F instead? [Re: polkat] #73419 06/14/08 10:37 PM 06/14/08 10:37 PM
Joined: Jan 2007 Posts: 953 Badham Co. Y Y3 70 BEE super stock
Y3 70 BEE super stock Y Joined: Jan 2007 Posts: 953 Badham Co.	Marv Booth got that issue somewhere.

Re: Type F instead? [Re: Y3 70 BEE] #73420 06/14/08 11:03 PM 06/14/08 11:03 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	yeah adding eng oil to a trans was so far off the norm it was scary so I just had to try it. live every 24 hour block of time like it's your last day on earth

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