Hydraulic Fluid in automatics

Mike Graham · 10-19-2018, 05:33 PM

It is more consistent from run to run. We use John Deere 303

Tim H · 10-19-2018, 05:59 PM

I recall reading numerous posts about this on YB many years ago.

Dragsinger · 10-19-2018, 06:22 PM

a respected/experienced converter builder tells me it "tightens" the converter 200 RPM. After some experimentation, I have settled on name brand Dexron/Mercon III. [that is to say, not a house brand] Valvoline, Pennzoil, Castrol, etc. The house brands, while OK for basic passenger car service, do not have the premium additive package to resist heat over time.

jmantle · 10-19-2018, 09:47 PM

The specific gravity of the fluid will have more influence on the stall speed than the viscosity. Synthetic fluids change viscosity less with temperature than dyno fluids so will be more consistent, look for a fluid built with group 4 base stock.
Confusing, yes, I do this stuff for a living.

Jim Mantle V/SA 6632

FLOYD RUSSO JR · 10-20-2018, 01:39 AM

A friend of mine here in gonzales la been running that !!! Keith hunter w powertrain specialist !!!! Works gd !!! Js

Kenny Bomar · 10-20-2018, 04:56 AM

I long time friend and serious bracket racer who owns a trans shop told me it does run a little more consistAnt but if you get into close back to back runs it doesn't stay as cool as regular trans fluid

ALMACK · 10-26-2018, 08:45 AM

I run the John Deere Hygard fluid in mine ( $ 17 a gallon)

Mark Yacavone · 11-07-2018, 12:25 PM

Quote:

Originally Posted by Mike Graham

It is more consistent from run to run. We use John Deere 303

Interested in this..
Anyone else with a similar experience in a small engine Stocker?
Best place to buy?

FED 387 · 11-07-2018, 01:31 PM

Just remember if you use TDH in a trans make sure you use the winter blend ---it is clear whereas the summer blend is "Orangish" in color---you can buy JD TDH at most farm supply stores , some Walmarts sell it also Autozone Napa etc& other auto parts stores can get it for you too--- stuff works great in rear ends too---race only not on the street rears

outlaw · 11-08-2018, 01:04 AM

I was told by a great super stock racer that's no longer with us to use John Deere TY22000. He said with atf fluid he changed it every 50 passes and the John Deere he put it in and ran it 150 passes when he would pull trans to freshen it. I ran it in a bracket car with a ford C4 with great luck and that's what he ran also. I just built a fresh C4 for a street truck put it in it but hasn't been long enough to tell how it will workout on the street. Around a 1000 miles so far so good.
Terry

10-19-2018, 05:33 PM	#1
Mike Graham Member Join Date: Jul 2002 Posts: 410 Likes: 1 Liked 341 Times in 67 Posts	Re: Hydraulic Fluid in automatics It is more consistent from run to run. We use John Deere 303

10-19-2018, 05:59 PM	#2
Tim H VIP Member Join Date: Jan 2007 Posts: 1,042 Likes: 1,075 Liked 482 Times in 159 Posts	Re: Hydraulic Fluid in automatics I recall reading numerous posts about this on YB many years ago.

10-19-2018, 06:22 PM	#3
Dragsinger VIP Member Join Date: Jul 2008 Location: Liberty City [East Texas] Posts: 1,760 Likes: 5 Liked 99 Times in 60 Posts	Re: Hydraulic Fluid in automatics a respected/experienced converter builder tells me it "tightens" the converter 200 RPM. After some experimentation, I have settled on name brand Dexron/Mercon III. [that is to say, not a house brand] Valvoline, Pennzoil, Castrol, etc. The house brands, while OK for basic passenger car service, do not have the premium additive package to resist heat over time. __________________ Larry Woodfin 471W

10-19-2018, 09:47 PM	#4
jmantle Member Join Date: Feb 2008 Location: Black Creek, BC Canada Posts: 331 Likes: 79 Liked 172 Times in 81 Posts	Re: Hydraulic Fluid in automatics The specific gravity of the fluid will have more influence on the stall speed than the viscosity. Synthetic fluids change viscosity less with temperature than dyno fluids so will be more consistent, look for a fluid built with group 4 base stock. Confusing, yes, I do this stuff for a living. Jim Mantle V/SA 6632

10-20-2018, 01:39 AM	#5
FLOYD RUSSO JR Member Join Date: Jul 2004 Location: GONZALES,LA Posts: 247 Likes: 2 Liked 1 Time in 1 Post	Re: Hydraulic Fluid in automatics A friend of mine here in gonzales la been running that !!! Keith hunter w powertrain specialist !!!! Works gd !!! Js

10-20-2018, 04:56 AM	#6
Kenny Bomar Member Join Date: Nov 2002 Location: mphs tn Posts: 223 Likes: 3 Liked 424 Times in 50 Posts	Re: Hydraulic Fluid in automatics I long time friend and serious bracket racer who owns a trans shop told me it does run a little more consistAnt but if you get into close back to back runs it doesn't stay as cool as regular trans fluid

10-26-2018, 08:45 AM	#7
ALMACK VIP Member Join Date: Jan 2009 Location: Bardstown, KY Posts: 1,937 Likes: 131 Liked 369 Times in 127 Posts	Re: Hydraulic Fluid in automatics I run the John Deere Hygard fluid in mine ( $ 17 a gallon) __________________ Alan Mackin Stock 3777/ SS 3377 P/SA & SS/PA Fox Thunderbird I/PS '95 Mustang GT

11-07-2018, 01:31 PM	#9
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,422 Likes: 529 Liked 333 Times in 180 Posts	Re: Hydraulic Fluid in automatics Just remember if you use TDH in a trans make sure you use the winter blend ---it is clear whereas the summer blend is "Orangish" in color---you can buy JD TDH at most farm supply stores , some Walmarts sell it also Autozone Napa etc& other auto parts stores can get it for you too--- stuff works great in rear ends too---race only not on the street rears

11-08-2018, 01:04 AM	#10
outlaw Member Join Date: Aug 2008 Posts: 137 Likes: 80 Liked 132 Times in 52 Posts	Re: Hydraulic Fluid in automatics I was told by a great super stock racer that's no longer with us to use John Deere TY22000. He said with atf fluid he changed it every 50 passes and the John Deere he put it in and ran it 150 passes when he would pull trans to freshen it. I ran it in a bracket car with a ford C4 with great luck and that's what he ran also. I just built a fresh C4 for a street truck put it in it but hasn't been long enough to tell how it will workout on the street. Around a 1000 miles so far so good. Terry

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