Tranny fluid - The 1947 - Present Chevrolet & GMC Truck Message Board Network

76bonanza · 12-16-2003, 09:33 AM

I am about ready to change my tranny pan and someone told me since I have a shift kit I should use type F tranny fluid. I have always used regular tranny fluid.

Thanks

77bowtie · 12-16-2003, 11:01 AM

I run B&M TrickShift. Works for me.

**swervin ervin** · 12-16-2003, 01:46 PM

I wouldn't. F type fluid is Ford fluid as I'm sure you know. I've heard from many sources B&M Trickshift is nothing more than Ford fluid.

From what I've read F fluid has more friction modifiers. What this means is more wear on the clutches. Not sure on this, just what I've read. All this reading was done on the internet, so you can take it with a grain of salt.

Why would you need fluid that would cause less slippage with a shift kit?

Chevy67Tk · 12-16-2003, 01:47 PM

Type F has its advantages but I am a firm believer of not mixing fluid types in transmissions

If you have been running dextron for a while and have no intention of pulling the torque converter to drain it. I would stick with it as your clutches and bands are soaked with it, and to get all the old out your going to need 5 gal buckets full of type F to flush all the old out.

**old Rusty C10** · 12-16-2003, 09:27 PM

use dextron 2 fluid in your GM or universal fluid if and when you gt a Ford and it tells you to use type F there is no need for different fluids for a shift kit

MylilBowTie · 12-17-2003, 03:01 AM

The only thing I would use other than dexron III is a synthetic that is compatible with it. The transmission was designed to run on dexron.

Ford has three automatic transmission fluid specifications: Type F (a non-friction modified formula for most 1964-81 transmissions), Mercon (a friction modified ATF similar to Dexron II for 1988-97 transmissions), and Mercon V (Ford’s latest friction-modified formula, introduced in 1997).

General Motors has two specifications: Dexron II and III. Both are friction modified formulas and Dexron III can be used in the older GM transmissions that originally required Dexron II.

This is why the Type F is bad, it has no friction modifiers. That's why it shifts more harshly (bangs) changing gears. Its harder on the transmission parts also. It allows it to slip very very briefly and when it catches back this is what causes it to shift harder. This all happens in one second or less.

Its up to you if you want to use Type F transmission fluid. I personally wouldn't.

Nvbowtie · 12-17-2003, 06:33 AM

I heard Type F, ran cooler ?

(or didn't get as hot as Dexron II) ???

I can tell ya, I accidently put a quart in my 700r4 in my
88 blazer (mixed up trunk boxes with Mustang)

and my tranny started slipping real bad
real quick, took down the street less than
a mile away and they did a transfusion
(dont recall technical term), and it was 100%
better ASAP.

I'll report back after I run my rebuilt Turbo 350 one day, it's full of
Type F, waiting on my engine to come back.

Bill

**crossy** · 12-17-2003, 07:04 PM

I always heard what mike did about the B&M being nothing but blue ford fluid. Here's what AS AN OLD TIMER that i do know , the ford fluid was preferred for firmer shifts because it is more absraive(for lack of a better term) and therefore causes the clutches to grab a little firmer. I was just looking at the B&M fluid today and for what they sell that for I can buy REALLY GOOD synthetic. I am going to go to synthetic in mine after I break it in. DAVE

12-16-2003, 09:33 AM	#1
76bonanza Senior Member Join Date: Mar 2003 Location: St robert Mo Posts: 2,001	Tranny fluid I am about ready to change my tranny pan and someone told me since I have a shift kit I should use type F tranny fluid. I have always used regular tranny fluid. Thanks __________________ 1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO

12-16-2003, 01:46 PM	#3
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	I wouldn't. F type fluid is Ford fluid as I'm sure you know. I've heard from many sources B&M Trickshift is nothing more than Ford fluid. From what I've read F fluid has more friction modifiers. What this means is more wear on the clutches. Not sure on this, just what I've read. All this reading was done on the internet, so you can take it with a grain of salt. Why would you need fluid that would cause less slippage with a shift kit? __________________ Mike 1985 Chevy C-10

12-16-2003, 01:47 PM	#4
Chevy67Tk Registered User Join Date: Mar 2003 Location: PA Posts: 349	Type F has its advantages but I am a firm believer of not mixing fluid types in transmissions If you have been running dextron for a while and have no intention of pulling the torque converter to drain it. I would stick with it as your clutches and bands are soaked with it, and to get all the old out your going to need 5 gal buckets full of type F to flush all the old out. __________________

12-16-2003, 09:27 PM	#5
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	use dextron 2 fluid in your GM or universal fluid if and when you gt a Ford and it tells you to use type F there is no need for different fluids for a shift kit __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

12-17-2003, 03:01 AM	#6
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	The only thing I would use other than dexron III is a synthetic that is compatible with it. The transmission was designed to run on dexron. Ford has three automatic transmission fluid specifications: Type F (a non-friction modified formula for most 1964-81 transmissions), Mercon (a friction modified ATF similar to Dexron II for 1988-97 transmissions), and Mercon V (Ford’s latest friction-modified formula, introduced in 1997). General Motors has two specifications: Dexron II and III. Both are friction modified formulas and Dexron III can be used in the older GM transmissions that originally required Dexron II. This is why the Type F is bad, it has no friction modifiers. That's why it shifts more harshly (bangs) changing gears. Its harder on the transmission parts also. It allows it to slip very very briefly and when it catches back this is what causes it to shift harder. This all happens in one second or less. Its up to you if you want to use Type F transmission fluid. I personally wouldn't. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

12-16-2003, 11:01 AM	#2
77bowtie Registered User Join Date: Apr 2003 Location: New Mexico. Of all places for an Island boy. Posts: 180	I run B&M TrickShift. Works for me.

12-17-2003, 06:33 AM	#7
Nvbowtie Registered User Join Date: Jul 2001 Location: Laughlin, Nv. USA Posts: 700	I heard Type F, ran cooler ? (or didn't get as hot as Dexron II) ??? I can tell ya, I accidently put a quart in my 700r4 in my 88 blazer (mixed up trunk boxes with Mustang) and my tranny started slipping real bad real quick, took down the street less than a mile away and they did a transfusion (dont recall technical term), and it was 100% better ASAP. I'll report back after I run my rebuilt Turbo 350 one day, it's full of Type F, waiting on my engine to come back. Bill __________________ www.unlimited2u.com/chevy Bill 1980 Chevy C-10 Silverado 1988 Chevy Blazer Tahoe

12-17-2003, 07:04 PM	#8
crossy Oh,you can't buy that new Join Date: Apr 2000 Location: Pennsville,N.J. 08070, USA Posts: 2,039	I always heard what mike did about the B&M being nothing but blue ford fluid. Here's what AS AN OLD TIMER that i do know , the ford fluid was preferred for firmer shifts because it is more absraive(for lack of a better term) and therefore causes the clutches to grab a little firmer. I was just looking at the B&M fluid today and for what they sell that for I can buy REALLY GOOD synthetic. I am going to go to synthetic in mine after I break it in. DAVE __________________ "been there, done that, ruined the T-shirt". 2007 LBZ GMC Sierra, ECSB 2006 LM7 RCSB Silverado 98 Vortec project. 94,3500,6.5L 4L80 81 SWB GMC POS finally gone 73 Pinto, stock, w/CragarSS's-eww LOTS of Cummins trucks.



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