1990 Mustang 5.0 lx Tremec T-5 oil type ? - Ford Mustang Forum
Reply
 
LinkBack Thread Tools
post #1 of 19 (permalink) Old 02-06-2008 Thread Starter
Rookie
 
zugspitz's Avatar
 
Joined: Mar 2007
Location: mojave
Posts: 36
 
1990 Mustang 5.0 lx Tremec T-5 oil type ?

installing brand new T-5 from Tremec (stock type) . Which type of fluid ? I think stock called for Mercon/Dexron II.. Was going to put in Royal Purple synthetic.. Did a search on the subject with no straight answer.. The Tremec websites states " most T-5 transmissions call for Dexron II "
zugspitz is offline  
Sponsored Links
Advertisement
 
post #2 of 19 (permalink) Old 02-06-2008
Apprentice
 
86mustang351's Avatar
 
Joined: Jan 2008
Location: meriden
Posts: 58
 
1. dissaprove of any royal purple product ever made...just cuz its expensive doesnt mean its good...JUNK

2. The factory calls for ATF III

3. i recommend using syncromesh...ive found it to have smoother shifts and protect better than the ATF
86mustang351 is online now  
post #3 of 19 (permalink) Old 02-06-2008
SHELBY GT-40 ULTIMATE Member
4.6L Member
5.0L Member
 
EagleAutosports's Avatar
 
Joined: Feb 2007
Location: Graham
Posts: 51,297
               
Send a message via MSN to EagleAutosports Send a message via Yahoo to EagleAutosports
I believe Tremec calls for GM Synchromesh fluid. Ask rj8806, he's in tech at Tremec.

rj8806 - proud member of - AllFordMustangs.com

AFM Site Administrator
Member: Mustang Club of America #82740, White Mustang Registry #362, NMRA, Fun Ford Weekend, Mustangs of Burlington

MOOG Certified Technician
For mods and sound clips, see profile and gallery.

EagleAutosports is offline  
post #4 of 19 (permalink) Old 02-06-2008 Thread Starter
Rookie
 
zugspitz's Avatar
 
Joined: Mar 2007
Location: mojave
Posts: 36
 
I was thinking the same.. Problem is I allready purchased the Royal Purple with the Tranny.. I am not big on using Synthetic products where it calls for regular oil.. Might just pick up some regular ATF and return the Royal Purple...

On that note.. it is getting harder and harder to find regular oil.. everything is Synthetic...

Transmissions and engines these days are not lasting like they used to.. Not sure if synthetic has anything to do with it....
zugspitz is offline  
post #5 of 19 (permalink) Old 02-06-2008
PONY Member
5.0L Member
 
93mustang's Avatar
 
Joined: Feb 2006
Location: Lee
Posts: 584
 
Quote:
Originally Posted by zugspitz View Post
installing brand new T-5 from Tremec (stock type) . Which type of fluid ? I think stock called for Mercon/Dexron II.. Was going to put in Royal Purple synthetic.. Did a search on the subject with no straight answer.. The Tremec websites states " most T-5 transmissions call for Dexron II "
I ran Dexron III for the first 500 miles in my new Tremec T-5z and then I put in Royal Purple Synthetic ATF Dexron III compatible fluid.
It shifts very smooth.
I ran it in my old T-5 and it worked great also.
93mustang is offline  
post #6 of 19 (permalink) Old 02-07-2008
Site Sponsor
4.6L Member
5.0L Member
 
rj8806's Avatar
 
Joined: Oct 2006
Location: Knoxville
Posts: 2,432
 
Quote:
Originally Posted by zugspitz View Post
installing brand new T-5 from Tremec (stock type) . Which type of fluid ? I think stock called for Mercon/Dexron II.. Was going to put in Royal Purple synthetic.. Did a search on the subject with no straight answer.. The Tremec websites states " most T-5 transmissions call for Dexron II "


ONLY USE Dexron 3 in the T5. The T5 actually uses 3 different types of materials in the blockers. The 1-2 blocker is actually made of a paper material, 3-4 is carbon fiber based and 5th is brass. Most synthetics on the market have additives that will break down the paper material in the 1-2 blockers and eventually ruin the transmission. Tremec actually tested and approved Mobil 1 synthetic and recommends, if you want to use a synthetic, Mobil 1 and ONLY Mobil 1.


Richard

Richard
Resident manual transmission/driveline guru :hihi:
Tech Sales Support
American Powertrain
A Tremec Elite Distributor
TKO, T45, 3650, T5 & T56 Transmission Systems
2199 Summerfield Rd
Cookeville, TN 38506 (931) 646-4836
rj8806 is offline  
post #7 of 19 (permalink) Old 02-07-2008
PONY Member
5.0L Member
 
93mustang's Avatar
 
Joined: Feb 2006
Location: Lee
Posts: 584
 
Quote:
Originally Posted by rj8806 View Post
ONLY USE Dexron 3 in the T5. The T5 actually uses 3 different types of materials in the blockers. The 1-2 blocker is actually made of a paper material, 3-4 is carbon fiber based and 5th is brass. Most synthetics on the market have additives that will break down the paper material in the 1-2 blockers and eventually ruin the transmission. Tremec actually tested and approved Mobil 1 synthetic and recommends, if you want to use a synthetic, Mobil 1 and ONLY Mobil 1.


Richard
So it is not a good thing to run the Royal Purple MAX ATF even though it says that is reccommended for transmissions requiring Dexron III or Mercon Fluids?
93mustang is offline  
post #8 of 19 (permalink) Old 02-08-2008
Site Sponsor
4.6L Member
5.0L Member
 
rj8806's Avatar
 
Joined: Oct 2006
Location: Knoxville
Posts: 2,432
 
Quote:
Originally Posted by 93mustang View Post
So it is not a good thing to run the Royal Purple MAX ATF even though it says that is reccommended for transmissions requiring Dexron III or Mercon Fluids?

Not if it is a full synthetic. Like I said, the additives in most synthetic fluids will slowly eat away at the 1-2 blockers in a T5 because they are a paper based material. Tremec has done extensive research and testing of fluids and has determined that the only full synthetic that does not harm the blockers, is Mobil 1. I don't know if that's because they don't use the same additives as the rest of the manuafactirers or not but I would trust Tremec over anyone else since they manufactured the transmission to begin with.



Richard

Richard
Resident manual transmission/driveline guru :hihi:
Tech Sales Support
American Powertrain
A Tremec Elite Distributor
TKO, T45, 3650, T5 & T56 Transmission Systems
2199 Summerfield Rd
Cookeville, TN 38506 (931) 646-4836
rj8806 is offline  
post #9 of 19 (permalink) Old 02-08-2008 Thread Starter
Rookie
 
zugspitz's Avatar
 
Joined: Mar 2007
Location: mojave
Posts: 36
 
Thanks .. I will go with the Dexron III . Not a big fan of the synthetic, especially the price of the stuff.

Original clutch and Transmission went 213,000 miles with regular ATF.. Just replacing Transmission while it is out.. Had a little side to side play on the Input shaft...
zugspitz is offline  
PONY Member
5.0L Member
 
93mustang's Avatar
 
Joined: Feb 2006
Location: Lee
Posts: 584
 
I e-mailed Royal Purple, and this is the response that I got.

We actually recommend our RP Synchromax for your Tremec as it provides superior protection for the bearings and gears yet works great in the synchronizer to gear hubs (blockers) providing superior shifting.
The RP MaxATF is a Dexron III fluid and is a second choice within our product line.

The RP Synchromax has been used in Tremecs for a decade with excellent results and is used by rebuilders specializing in both drag and road racing applications.

Tremec recommends only one fluid in that they have chosen only to test one fluid -
Kind of like saying that Mustangs come factory equipped with Motorcraft oil filters and we have tested Motorcraft oil filters to be excellent with the 4.6L. We only recommend using Motorcraft Oil filters.

The statement regarding 'synthetics' would be as accurate as saying 'plastics' or 'rubber' components - far to general to be anything more than that.

RP recommends our Synchromax as a first choice and RP MaxATF as a second choice in Tremec manual transmissions.
93mustang is offline  
post #11 of 19 (permalink) Old 02-09-2008 Thread Starter
Rookie
 
zugspitz's Avatar
 
Joined: Mar 2007
Location: mojave
Posts: 36
 
Not sure about Royal Purple but I went to the Ford dealer today and mentioned that Dexron III is being fazed out, replaced by Mercon V ( a synthetic blend that is recommended for Dexron uses)

Furthermore the Ford Dealer advised to stay away from the Royal Purple synthetic fluid. They do not recommend using that fluid in a Tremec Transmission
zugspitz is offline  
PONY Member
5.0L Member
 
93mustang's Avatar
 
Joined: Feb 2006
Location: Lee
Posts: 584
 
I actually talked to Tremec when I first bought my transmission last year. They told me Dexron III. If I wanted to run something more advanced, go with GM synchromesh after 500 miles.
I'm drainning the Royal Purple and going with regular Dexron or GM sychromesh.
93mustang is offline  
MACH I Member
5.0L Member
 
Tominator's Avatar
 
Joined: Nov 2003
Location: Cahokia
Posts: 2,749
 
Quote:
Furthermore the Ford Dealer advised to stay away from the Royal Purple synthetic fluid. They do not recommend using that fluid in a Tremec Transmission
Do you really think they would recommend a product that they do not sell?:nogrinner

EVERY company will ONLY recommend a product if they can make a buck on it.

Thousands of Tremec transmissions have synthetics in them and wear issues are very rare to non-existent.

I've used Amsoil equivalent in my Viper Spec Tremec for 12,000 miles and no issues have surfaced. I see no reason to change it.:shiny:

'95 Ranger 5.0 GT40X Tri-y GT40 Intake S-Trim Snow Stage 2 Lowered Baer Racing Brakes Viper Spec Tremec w/Hurst shifter Custom Interior Dakota Digital Dash Corbeau Toplines OZ Racing AM/FM/Mp3/CD/DVD/TV.

2014 GTIG 5.0 Vert. Sil Carb Fiber dash. Bama Race Tune. Gibson axle backs. STEEDA Springs KONI STR.T Adj. Panhard
Tominator is online now  
Site Sponsor
4.6L Member
5.0L Member
 
rj8806's Avatar
 
Joined: Oct 2006
Location: Knoxville
Posts: 2,432
 
Quote:
Originally Posted by Tominator View Post
Do you really think they would recommend a product that they do not sell?:nogrinner

EVERY company will ONLY recommend a product if they can make a buck on it.

Thousands of Tremec transmissions have synthetics in them and wear issues are very rare to non-existent.

I've used Amsoil equivalent in my Viper Spec Tremec for 12,000 miles and no issues have surfaced. I see no reason to change it.:shiny:

Since we were only taking about the T5, that's where my response came from. The T56 has a completely different blocker and syncro setup and are made up of completely different materials.


Richard

Richard
Resident manual transmission/driveline guru :hihi:
Tech Sales Support
American Powertrain
A Tremec Elite Distributor
TKO, T45, 3650, T5 & T56 Transmission Systems
2199 Summerfield Rd
Cookeville, TN 38506 (931) 646-4836
rj8806 is offline  
PONY Member
5.0L Member
 
93mustang's Avatar
 
Joined: Feb 2006
Location: Lee
Posts: 584
 
Quote:
Originally Posted by rj8806 View Post
ONLY USE Dexron 3 in the T5. The T5 actually uses 3 different types of materials in the blockers. The 1-2 blocker is actually made of a paper material, 3-4 is carbon fiber based and 5th is brass. Most synthetics on the market have additives that will break down the paper material in the 1-2 blockers and eventually ruin the transmission. Tremec actually tested and approved Mobil 1 synthetic and recommends, if you want to use a synthetic, Mobil 1 and ONLY Mobil 1.


Richard
I talked to Tremec tech today.
I've had the Royal Purple ATF synthetic in my T-5z for 1500 miles.They said that I would have noticed some problems by now if it wasn't working correctly. But this product has never been tested by them, so he reccommended draining it to be on the safe side. Most companies won't tell Tremec what type of additives are used, so that is why they only test the major ones. And for synthetics as stated by Richard, Mobil One is reccommended and has been tested. Other synthetics can actually be too slick and cause slipping.
I was told that regular Dexron III works the best.
For my car application, which is a street legal car, mainly used for drag racing, he reccommended GM Synchromesh. You can get it in the Pennzoil brand in the gear oil section at most parts stores.
I may just stick with the regular old Dexron III in the Valvoline brand.
93mustang is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183