I have a customer with an 05 Mustang GT. It only has 18K miles but he wants it well taken care of. He told me to treat like it was mine, so naturally I started obsessing over the "best" fluids for the job. It'll get brake fluid and coolant changed and probably the rear gear oil too. In looking up the spec'ed fluids I see that Ford is calling for "Synthetic MERCON® Part No. XT-2-QSM" . Would a dedicated MTF be a better option?
ATF vs MTF for Tremec 3650
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Genuine Ford Fluid XT-M5-QS. That's what I would use.
Originally Posted by maxdustington
Genuine Ford Fluid XT-M5-QS. That's what I would use.
No no no!!! That transmission does not call for that gear oil based fluid at all. They have updated the listing to Mercon V for the TR-3650.
Genuine Ford Fluid XT-M5-QS. That's what I would use.
No no no!!! That transmission does not call for that gear oil based fluid at all. They have updated the listing to Mercon V for the TR-3650.
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Originally Posted by bdcardinal
Originally Posted by maxdustington
Genuine Ford Fluid XT-M5-QS. That's what I would use.
No no no!!! That transmission does not call for that gear oil based fluid at all. They have updated the listing to Mercon V for the TR-3650.
^^This
If you put a gear oil in that transmission you may end up with gear clash when you shift.
Originally Posted by maxdustington
Genuine Ford Fluid XT-M5-QS. That's what I would use.
No no no!!! That transmission does not call for that gear oil based fluid at all. They have updated the listing to Mercon V for the TR-3650.
^^This
If you put a gear oil in that transmission you may end up with gear clash when you shift.
Originally Posted by aquariuscsm
Originally Posted by bdcardinal
Originally Posted by maxdustington
Genuine Ford Fluid XT-M5-QS. That's what I would use.
No no no!!! That transmission does not call for that gear oil based fluid at all. They have updated the listing to Mercon V for the TR-3650.
^^This
If you put a gear oil in that transmission you may end up with gear clash when you shift.
Originally Posted by Kode
Sounds good. Is mercon a mineral oil base? What is MTF?
MTF = manual transmission fluid. Mercon V is a synthetic blend.
Originally Posted by bdcardinal
Originally Posted by maxdustington
Genuine Ford Fluid XT-M5-QS. That's what I would use.
No no no!!! That transmission does not call for that gear oil based fluid at all. They have updated the listing to Mercon V for the TR-3650.
^^This
If you put a gear oil in that transmission you may end up with gear clash when you shift.
Originally Posted by Kode
Sounds good. Is mercon a mineral oil base? What is MTF?
MTF = manual transmission fluid. Mercon V is a synthetic blend.
Just wanted to offer my
: I had an '04 GT with the 3650 5spd. I used the Mobil 1 Full Synthetic ATF in mine. No complaints. Not sure if this truly was the "best" for the trans, but based on the extensive research I did at the time (~2010) it was the best out there. This was determined by searching this site, speaking with dealer transmission techs, some people in the aftermarket Mustang world, and even speaking to a (supposed) engineer at Tremec (along with other sources I'm forgetting). But this info is 8 years old...
It seemed to have a slight improvement overall, but not dramatic. Ultimately the Mobil 1 served 40k problem free miles before I sold it. Not trying to instigate the fluid gurus on this site, just saying in my case it worked great, and it should do the same for anyone else.
It seemed to have a slight improvement overall, but not dramatic. Ultimately the Mobil 1 served 40k problem free miles before I sold it. Not trying to instigate the fluid gurus on this site, just saying in my case it worked great, and it should do the same for anyone else.
I currently drive a 2002 mustang gt with the 3650 in it. I bought it with 127k now it has 174k on it. Amsoil synchromesh has been the best I have used so far. It's been in there for 20k right now with no issues. Pennzoil synchromesh works well too.
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