T5 help ASAP...

[Nemo]

About 3 years ago I purchased a reman t5 from a shop. Only thing is before I left he told me to use I believe 75 weight gear oil. From
What I know most or all t5's use ford ATF. He told me something about some parts that were put in that require the gear oil. Would i be safe running gm synchromesh as a substitute for gear oil? Or what would be different to an extreme where I can't use ATF.

[91GriggsGT]

Probably be ok with the synchromesh fluid. I changed out my fluid and used ATF and have had no problems. I know Tremecs can use sycnchromesh, and tremec actually suggests synchromesh.

So personally, I would go to the closest GM dealer and pick ya up a few quarts, dump it in, and roll with it.

[Nemo]

Would really hate to ruin a new trans not knowing for sure

[BlueCoupeRedVert]

It's the synchros that require the ATF / Synchromesh right?? What type of synchros would be suitable for gear oil?

[thesource]

Look on the driver side just above the reverse light. If there is a hex head bolt, you can use gear lube or motor oil in it. If there is a torx bolt, use ATF!

[Nemo]

Look on the driver side just above the reverse light. If there is a hex head bolt, you can use gear lube or motor oil in it. If there is a torx bolt, use ATF!

Is that the connector at the very front top on the drivers side? Near where the bell housing bolts to trans? What would be the difference internally because of those bolts?

[Nemo]

Nvm this one? This is what Is on it. Hex

[Nemo]

Would i use 75w-90? What would you recommen?

[91GriggsGT]

There is a ton of info out there if you google it, but from what I have read, if it is a NON- world class T5, you run gear oil. if it is a WORLD CLASS, run ATF.

So, you need to identify if it is a W/C or Non-W/C T5.

Here is a link for you: http://www.flatheadv8.org/ernie/ernie-t5.htm

Here is another link that might help you: http://www.allfordmustangs.com/forum...nsmission.html

The following was pulled from allfordmustangs.com:

Borg-Warner T-5 Transmission Data

Not All T-5's are Created Equal
Not all Borg Warner T-5's are the same. The first T-5 five speeds were introduced to market in 1982, in all things, a AMC Spirit/Concord. In 1983, T-5's were introduced to Mustangs and are currently still used in the V-6 Mustangs. The T-5 is the only American made standard transmission to span almost 20 years of production. Because of the large quantities of T-5's produced, many parts are interchangeable. There are now over 200 different T-5 transmission assembly part numbers and still counting.

World Class & Non-World Class
There are two basic kinds of T-5's, Non World Class (NWC) and World Class (WC). In 1983 and 84 Ford used Non-World Class T-5 to improve performance and gas mileage at the same time. The NWC boxes had 2.95 first gear set with 1st, 2nd, 3rd, gears riding on a solid output shaft. The counter gears spin on straight cylindrical bearings with thrust washer in front. 3rd, 4th and 5th gears used solid bronze synchros. 1st and 2nd gears used fiber linings bonded to steel rings. Torque rating for the NWC was 265ft/lbs.
1985, Ford introduced the World Class T-5 installed with 3.35 first gear set. No longer were 1st, 2nd, and 3rd gears spinning on a solid output shaft. Needle bearings were installed under each gear to reduce drag. The lower counter gears saw tapered bearings. All main shaft synchros were fiber lined steel rings to improve ring surface area while 5th remains bronze. By improving the surface area, the synchro slows the gear faster making for smoother shifts. Torque rating remained the same at 265ft/lbs.

1990 to 1993 the stock Ford production V-8 WC T-5 was upgraded with stronger 3.35 gear set. The nickel content was increased to produce a harder, stronger gear. 2nd and 3rd gear ratios decrease slightly. Synchro linings on 3rd, 4th were improved by changing to carbon fiber to further improve shifting. Longer throw shifter was installed to "easier to shift". Torque rating jumped to 300ft/lbs.
When the 93 Cobra was introduced, so was the "Cobra Spec" T-5. It was the first T-5 with a front tapered output bearing and steel front bearing retainer. The Cobra boxes also received a reverse brake and synchro assembly where there was none before. Just about everything else remained the same. Torque rating was increased to 310ft/lbs.

1994 and 95 were the last two years Ford used the T-5 behind a V-8. In the SN95 Mustangs, the bell housing in both 3.8L and 5.0L was made longer to place the T-5 shifter in the correct location to the body. This in turn made the input shaft longer. The neutral safety switch was eliminated, as it was no longer needed. Everything else remained the same.

Today's V-6 Mustangs sports the last of the T-5s. The T-5 behind the 3.8L is a 3.35 first gear set with a .68 over drive. What makes these different from the rest is the electronic speedometer trigger. No longer is there a mechanical driven cable system. It has the longer input shaft equipped with a steel front bearing retainer and reverse synchro brake assembly. Torque rating is 300ft/lbs.

Ford also used the T-5 in 2.3L through the years. While the 4 cylinder T-5 may appear to be the same they are not. Most 4 cylinder T-5s received a 3.97 gear set with a .79 overdrive and small input pilot bearing shaft. Four cylinder T-5's should not be used behind a V-8, even when the pilot bearing id is decreased to match. Simply put, they will not hold up. Torque rating ~240ft/lbs. Besides first gear is much too low to be usable.

The "Z" Spec

In about 1993 Ford started offering a new service unit to the motorsport crowd. The "Z" spec T-5, also sometimes referred to as "World Class T-5". Most folks, associate the term "World Class" as meaning the best. The T-5z is a 93 Cobra T-5 with 2.95 first gear set and .63 over drive. It has the best of everything. Hardened gears, short throw shifter, steel front bearing retainer, and tapered output shaft bearing. Best of all it has a torque rating of 330ft/lbs. This T-5 can handle up to 450 hp if not drag raced.

So as you can see not all T-5's were created equal. T-5's are a smooth shifting, strong, light weight transmission that can be used for daily driving or medium racing.

One last piece of important information. ALL World Class T-5 use ATF oil and NOT heavy gear oil or Redline MTL! All NON-World Class T-5 use 70 wt gear oil.

[thesource]

Nvm this one? This is what Is on it. Hex

That is an older non world class T5. You can use a heavy motor oil in it or 75-90 GL. In the summer the GL will be fine. In the winter, you could have issues until it warms up. I would probably go with a 15-40 Rotella if it was my trans in my car.