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transmission oil

  • Thread starter Thread starter stanGRR
  • Start date Start date Nov 22, 2010
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stanGRR

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Nov 6, 2009
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Nov 22, 2010
#1
  • Nov 22, 2010
  • #1
what kind of oil use for my t-5 transmission?
a mechanic guy add motor oil because he say its better, It is true????
 

MFE92

10 Year Member
Aug 25, 2010
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Phoenix
Nov 22, 2010
#2
  • Nov 22, 2010
  • #2
Dexron-Mercon ATF. Find a new mechanic.
 

cardudeusa

Founding Member
Oct 22, 2002
1,744
5
48
Home of the Florida Gators!
Nov 22, 2010
#3
  • Nov 22, 2010
  • #3
Yeah definitely find a new mechanic. I've always used Mobil 1 atf.
 

f8tlfiveo

My wife likes my spool and blow-off valve.
Aug 8, 2007
1,585
102
64
Lancaster, PA
Nov 22, 2010
#4
  • Nov 22, 2010
  • #4
+1 ATF
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,222
17,909
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Massachusetts
Nov 22, 2010
#5
  • Nov 22, 2010
  • #5
2.8 quarts of ATF.

Non-synthetic has been frequently recommended but run whatever you want
 

stanGRR

New Member
Nov 6, 2009
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Nov 23, 2010
#6
  • Nov 23, 2010
  • #6
ok thaks guys i will look for another mechanic lol
 

Eulers

Member
Oct 12, 2010
57
3
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Nov 24, 2010
#7
  • Nov 24, 2010
  • #7
Mercon III ATF?

MFE92 said:
Dexron-Mercon ATF. Find a new mechanic.
Click to expand...
I seen recommendations posted for Mercon III ATF for use in OEM T-5.
--> Is Mercon III a synthetic fluid?
I'd like to know since I just drained my T-5. THanks.
 

Eulers

Member
Oct 12, 2010
57
3
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Apr 13, 2011
#8
  • Apr 13, 2011
  • #8
Redline D4 ATF

FYI: Redline's own website has an Application Chart. The Ford Mustang T-5 manual is listed.
 

Beasty306GT

Active Member
Dec 19, 2002
671
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28
Oxford,Mass
Apr 13, 2011
#9
  • Apr 13, 2011
  • #9
Royal purple can't go wrong I use it
 

Eulers

Member
Oct 12, 2010
57
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Apr 14, 2011
#10
  • Apr 14, 2011
  • #10
ATF for T-5

Which Royal Purple do you use? (Assuming you have T-5?)
 
O

oldfox

Member
Feb 19, 2009
234
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Apr 14, 2011
#11
  • Apr 14, 2011
  • #11
your mechanic must be an old school guy. You got to remember back in the day, Parts moved slower and fit looser and heat was a problem. A thicker oil was usually best in everything if you were going to race.
That's why most of the old school guys are always wanting to thicken up the lubricating oil. Some of those old guys are good mechanics but they just never got over the fact that today's stuff works faster and has tighter tolerances and a thinner oil is needed.

I know I'm and old school guy myself but I have learned to listen to what some of the sharp young guys have to say and adapt
 

No.11

10 Year Member
Oct 13, 2009
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Apr 15, 2011
#12
  • Apr 15, 2011
  • #12
Question: Why is ATF better than MTF for a 5 speed?
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,222
17,909
224
Massachusetts
Apr 15, 2011
#13
  • Apr 15, 2011
  • #13
No.11 said:
Question: Why is ATF better than MTF for a 5 speed?
Click to expand...

Because the T-5 has some tight clearances and fluid needs to flow rather easily to reach some of the inner roller bearings under the gears. Everything is splash lubricated, so the transmission is designed in such a way that requires ATF for proper lubrication.

Motor oil tends to be rather thick, especially on cold mornings. If you've ever done an oil change in sub-20 degree temps after leaving the oil outdoors, you'd know exactly what I mean.

Potential results could be a whining transmission as bearings overheat and begin to score the shafts
 

No.11

10 Year Member
Oct 13, 2009
614
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Apr 15, 2011
#14
  • Apr 15, 2011
  • #14
so manual transmission fluid is too heavy?
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,222
17,909
224
Massachusetts
Apr 15, 2011
#15
  • Apr 15, 2011
  • #15
There is no such thing as "Manual transmission fluid"

Automatic trans fluid is not really just for automatics. Many manual transmissions use it, as well as using it in power steering.

Other fluids manuals can use are motor oil or gear oil.

All depends on the trans design. But the T-5 is designed to use ATF
 

No.11

10 Year Member
Oct 13, 2009
614
10
48
Los Angeles
Apr 15, 2011
#16
  • Apr 15, 2011
  • #16
Mustang5L5 said:
There is no such thing as "Manual transmission fluid"

Automatic trans fluid is not really just for automatics. Many manual transmissions use it, as well as using it in power steering.

Other fluids manuals can use are motor oil or gear oil.

All depends on the trans design. But the T-5 is designed to use ATF
Click to expand...

Royal Purple Synchromax Manual Transmission Fluid


This is what I bought not too long ago for my car. But if ATF is better, I'll be switching to it once I get the engine and trans out this coming week. WOOOO SPRING BREAK!
 

Beasty306GT

Active Member
Dec 19, 2002
671
4
28
Oxford,Mass
Apr 15, 2011
#17
  • Apr 15, 2011
  • #17
No.11 said:
Royal Purple Synchromax Manual Transmission Fluid
View attachment 191533

This is what I bought not too long ago for my car. But if ATF is better, I'll be switching to it once I get the engine and trans out this coming week. WOOOO SPRING BREAK!
Click to expand...

thats what i use..great stuff nice smooth shifts lubes everything up nice
 

No.11

10 Year Member
Oct 13, 2009
614
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48
Los Angeles
Apr 15, 2011
#18
  • Apr 15, 2011
  • #18
yep mine is nice and smooth too with that royal purple.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,222
17,909
224
Massachusetts
Apr 15, 2011
#19
  • Apr 15, 2011
  • #19
No.11 said:
Royal Purple Synchromax Manual Transmission Fluid
View attachment 191532

This is what I bought not too long ago for my car. But if ATF is better, I'll be switching to it once I get the engine and trans out this coming week. WOOOO SPRING BREAK!
Click to expand...


Okay, technically that is a type of fluid that is used in a manual transmission....but it's very similar to ATF more than anything. So you got me on a slight technicality.
 

No.11

10 Year Member
Oct 13, 2009
614
10
48
Los Angeles
Apr 15, 2011
#20
  • Apr 15, 2011
  • #20
ok so this is good then for a t5? cause I've always been a fan of royal purple.
 
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