trans fluid recommendations
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Senior User
Joined: Nov 2006
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Originally Posted by Tenn01PSD350
So please refresh me on the tranny mods you have planned. I don't know what was mentioned earlier.
so it seems as though no one like the idea of going to mercon V? I have never heard of syn trans fluid having too much lubricity and make an older trans start slipping
. thanks for all the replys, can someone chime in here that has swapped to MerconV?
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Senior User
Joined: Nov 2006
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I need a scientist.......... can someone analyse these numbers and tell me which one is better. I have narrowed my decision to Royal Purple, Mobile 1, Schaeffers. I couldnt find any properties on the Schaeffers oil. here are resullts for the others
ROYAL PURPLE
Typical Properties*
Viscosity
cSt @ 40°C
32.4
cSt @ 100°C
7.4
SSU @ 100°F
272.8
SSU @ 210°F
63.2
@ -10°C (14°F)
568
@ -20°C (-4°F)
1200
@ -30°C (-22°F)
2868
@ -40°C (-40°F)
7934
Viscosity Index
197.5
Flash °F
450
Fire °F
490
Foam Test
Sequence I
0 ml / 0 ml
Sequence II (4 sec.)
10 ml / 0 ml
Density
A.P.I.
37.8
Specific Gravity @ 60°F
0.8358
Pounds / Gallon
6.96
Copper Corrosion
3 hrs. @ 210°F
1a
MOBIL1
Typical Properties
Mobil 1 Synthetic ATF
Viscosity, ASTM D 445
cSt @ 40º C 34
cSt @ 100º C 7.6
Brookfield Viscosity, ASTM D 5293
-cP @ -40º C 5190
Viscosity Index, ASTM D 2270 199
Pour Point, ºC, ASTM D 97 -54
Flash Point, ºC, ASTM D 92 236
Density @15º C kg/l, ASTM D 4052 0.86
Color Red
I am not sure if the numbers are the higher the better or lower the better! Also does anyone know what the properties are for Schaeffers.
ROYAL PURPLE
Typical Properties*
Viscosity
cSt @ 40°C
32.4
cSt @ 100°C
7.4
SSU @ 100°F
272.8
SSU @ 210°F
63.2
@ -10°C (14°F)
568
@ -20°C (-4°F)
1200
@ -30°C (-22°F)
2868
@ -40°C (-40°F)
7934
Viscosity Index
197.5
Flash °F
450
Fire °F
490
Foam Test
Sequence I
0 ml / 0 ml
Sequence II (4 sec.)
10 ml / 0 ml
Density
A.P.I.
37.8
Specific Gravity @ 60°F
0.8358
Pounds / Gallon
6.96
Copper Corrosion
3 hrs. @ 210°F
1a
MOBIL1
Typical Properties
Mobil 1 Synthetic ATF
Viscosity, ASTM D 445
cSt @ 40º C 34
cSt @ 100º C 7.6
Brookfield Viscosity, ASTM D 5293
-cP @ -40º C 5190
Viscosity Index, ASTM D 2270 199
Pour Point, ºC, ASTM D 97 -54
Flash Point, ºC, ASTM D 92 236
Density @15º C kg/l, ASTM D 4052 0.86
Color Red
I am not sure if the numbers are the higher the better or lower the better! Also does anyone know what the properties are for Schaeffers.
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Joined: Feb 2004
Posts: 509
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From: Findlay, Il
I hate to say this, but at 750,000 miles all I do is drain what fluid comes out then refill with Mercon and add a quart of Lucas. I haven't changed filter lately because the Quick Lube shop stripped about half of the treads out. I do tow!!
Senior User
Joined: Jul 2003
Posts: 491
Likes: 2
From: Spicewood, TX.
4844, yes the Syn is more slippery then the Mercon, and if you have 'more' power there is a good chance you can overpower the frictions and get them to slip, A moderately modded truck CAN and will slip the frictions, that is one reason you see so many of these trans go...because of abuse..
I would not use Mercon V as it is not compatitable with the friction clutch adhesive. So does this mean you cant-NO, does this mean the trans will blow up..NO. I wouldn't do it...Remember when Ford specified NOT to use Mercon V in the 4R100's? Read the owners manual if you dont believe me.
FWIW- I use amsoil/Schaefers Syn ATF in my 400HP 4R100 stock trans, take it to the strip as well, I still have the OEM clutches and OEM TC. No slippage here....YET.
I would not use Mercon V as it is not compatitable with the friction clutch adhesive. So does this mean you cant-NO, does this mean the trans will blow up..NO. I wouldn't do it...Remember when Ford specified NOT to use Mercon V in the 4R100's? Read the owners manual if you dont believe me.
FWIW- I use amsoil/Schaefers Syn ATF in my 400HP 4R100 stock trans, take it to the strip as well, I still have the OEM clutches and OEM TC. No slippage here....YET.
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Posts: 2,210
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Originally Posted by Mach1
4844, yes the Syn is more slippery then the Mercon,
Thread Starter
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Senior User
Joined: Nov 2006
Posts: 119
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so is royal purple and schaffers not synthertics? i could hace swore they were! also schaffers says it is compatible with Mercon, Mercon V and a number of other various ratings. also the RP is the same way.
Hotshot
Joined: Dec 2003
Posts: 18,423
Likes: 9
From: iowa
I run RP in my race trannies and plan on switching my PSD over to it pretty soon. I have found it lowered my race temps by 10 degrees and if it will do that with the abuse I put that tranny through just think what it will do to my 4R100.
Also RP can be purchased at NAPA, and RP is also a site sponser.
Also RP can be purchased at NAPA, and RP is also a site sponser.
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