transmission oil

[stanGRR]

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]

Dexron-Mercon ATF. Find a new mechanic.

 

[cardudeusa]

Yeah definitely find a new mechanic. I've always used Mobil 1 atf.

 

[f8tlfiveo]

+1 ATF

 

[Mustang5L5]

2.8 quarts of ATF.

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

 

[stanGRR]

ok thaks guys i will look for another mechanic lol

 

[Eulers]

Mercon III ATF?

Dexron-Mercon ATF. Find a new mechanic.

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]

Redline D4 ATF

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

 

[Beasty306GT]

Royal purple can't go wrong I use it

 

[Eulers]

ATF for T-5

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

 

[oldfox]

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]

Question: Why is ATF better than MTF for a 5 speed?

 

[Mustang5L5]

Question: Why is ATF better than MTF for a 5 speed?

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]

so manual transmission fluid is too heavy?

 

[Mustang5L5]

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]

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

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]

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!

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

 

[No.11]

yep mine is nice and smooth too with that royal purple.

 

[Mustang5L5]

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!

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]

ok so this is good then for a t5? cause I've always been a fan of royal purple.