one set of 5th i have has 25t on the drive (small gear) and 51t on the driven side (large gear)

Mathematically , 25/51 = 0.49

other set has 27t on the drive side (small gear) and 59t on the driven side (large gear)

Mathematically, 27/59 = 0.457

with those 5th gear sets mentioned above what would the final (5th) gear be with my T5 (2.95 1st gear) thanks

What year and is your T5 factory, Motorsport, or aftermarket? For a T5 with a 2.95 1st, it should have either 0.63 or 0.80 5th.....

 

Just FYI: My T5-Z has the 2.95 1st and a .63 OD. My stock/factory T5 had a 3.35 1st and .68 OD...

 

tring to figure out which final gear to use on this T5.

not sure if it matters but the transmission is a 1st 2.95 ratio T5

one set of 5th i have has 25t on the drive (small gear) and 51t on the driven side (large gear)

other set has 27t on the drive side (small gear) and 59t on the driven side (large gear)

with those 5th gear sets mentioned above what would the final (5th) gear be with my T5 (2.95 1st gear) thanks

The final ratio for fifth depends on the number of teeth on the input shaft and counter gear.

For a 2.95 T-5 the 25/51 pair is standard for a T5Z and is 0.63 (0.63317).
If you use the 27/59 pair it will yield 0.59 (0.591102)

For a 3.35 T-5 the 25/51 pair will yield 0.73 (0.724638) which is standard for a 94-98 V-6
The standard pair for the rest of the 3.35 T-5s is the 27/59 pair which yields 0.68 (0.676492)


Also, there are a number of gear pairs that can yield around 0.80 for a 2.95 transmission.
The factory pair was 33/53t and yielded 0.80 (0.804245).
This 33/53 gear pair is no longer available other than as an occasional used pair.

There are at least two manufactuers of aftermarket gears with a ratio of around 0.80 for racing purposes with a 2.95 transmission.
These aftermaret gears have strong, coarse teeth and don't strip out like the factory 0.80 gear pair does.

 

FWIW - but need the referenced "Tag" numbers ---> Identification Key to Borg-Warner T5 transmission ID Tags

 

FWIW - but need the referenced "Tag" numbers ---> Identification Key to Borg-Warner T5 transmission ID Tags

What tag numbers do you need???

There are at least 30 different Mustang WC T-5 Tags...

The Motorsport T5Z is a 1352-249 and is also tagged M-7003-Z
The aftermarket T5Z is a 1352-251, but there are other 2.95WC T-5s.

 

i would like to find out what ratio's are in my t5, bought it used and swapped it into my car. it doesnt have the id tag on it, is there some other number on it i can use to determine what gear set is in it?

 

Post #10 may help if you know it is not a 4-cyl T-5 and know which type of vent tube is on top...

 

Here's the chart I got my information from for the 0.63 and 0.80 ratios.....

Ford Mustang: Mustang Tech: Transmission and Drivetrain: Borg Warner T5 Transmission data

 

Here's the chart I got my information from for the 0.63 and 0.80 ratios.....

Ford Mustang: Mustang Tech: Transmission and Drivetrain: Borg Warner T5 Transmission data

Yes, I use a form of that chart because it only contains Mustang transmissions. It doesn't cover any Mustang T-5s after 1998, but there are only a few more types.

The write-up on that page is FULL of misconceptions about the T-5.
The source that that was copied from (word for word) has since been changed. I requested permission to, and re-wrote that article and submitted it to the actual owner of that webite over a year and a half ago. It never got published...

I am drafting an article that will help people to identify T-5s that don't have tags. Some day I will publish it somewhere...

 

It always burns me that people leave the tags off when they open them...

If it is a World Class transmission, and all Mustang T-5s are beginning 1985, the input shaft was definitely the V-8 diameter and not the smaller 4-cylinder diameter, then there are only 3 gear sets that are used.

The World Class 2.95 transmissions are only available as an aftermarket unit, or through Ford Racing/Motorsport.
The 2.95 transmissions use 2.95, 1.94, 1.34, 1.00, and 0.63
The exception is that a couple of rare 2.95 T-5s have the 0.80 fifth gear.

All world Class V-8 and V-6 T-5s use a 3.35 first gear.
85-89 5.0 use 3.35, 1.93, 1.29, 1.00, 0.68
90-95 5.0 use 3.35, 1.99, 1.33, 1.00, 0.68
94-98 V-6 use 3.35, 1.93, 1.29, 1.00, 0.73
99 and newer V-6 use 3.35, 1.99, 1.33, 1.00, 0.68

If the tag is off, parts can be swapped and there is not much of a way to tell what is in it, but if it is a standard transmission from the list above there are certain external characteristics that point to the year ranges.

All of the production V-8 ratio combinations are listed above, so...

For example, the vent cap on an 89 and older T-5 is hard plastic with a flat top. From 90-95 it is a larger metal cap that is shaped like a bottle cap. Around 96 or so, those vents became rubber. If it has a rubber vent tube it is either a V-6 T-5 or a recent production 2.95 T5Z.

I can go on and list the casting numbers used in the various years as well...

 

I didn't mean to knock what you said. It is just that it strikes a nerve with me when that article at AllFord is referenced. When faced with the facts, they said they would update it and then with the actual text in their hands, they didn't... The website that it was copied from has since updated their information and covered many of the issues, but this article won't go away and can't seem to get updated. It just lives on and on... :crying:

I use both charts. The British V8 chart is good for all brands of cars. The one pasted at the end of the AllFord article is GREAT for the Ford T-5s through 1994, but The T-5 continued going into V-6 Mustangs through 2010.

I think that chart was first published by FordMuscle.com and has been copied many places. These two charts ARE the best resources outside of the Borg-Warner/Tremec manuals which are not available to the public. The footnotes on the fordMuscle chart are correct and support the dates of the changes and small differences through the years.

Yes, the internet myths have been repeated so much until people believe that the NON-WC T-5 uses gear oil and that the V-6 T-5s are the same as the V-8 T-5 and that the 93 COBRA T-5 was the first to have the reverse brake.

These are facts:
The 3-4 synchros were upgraded to Carbon-Fiber in 1992, not 1990, and all Mustang T-5s had the reverse brake feature beginning in 1992. This includes the 4-cylinder models as well!

Some disagree with me for a while, but the documentation bears out the facts and I have convinced many that there is a lot of misinformation about the T-5 out on the Intenet...

I won't post an actual link here, but there are a series of posts on the Southeastern Fox Bodies forum called "T-5 Internet Myths" that are posted, and so far have remained pretty much unchallenged.

Some day I will eventually publish an article on how to (mostly) identify a T-5 without an ID-Tag.

 

Some day I will eventually publish an article on how to (mostly) identify a T-5 without an ID-Tag.

Published a while ago, but this is a link to it:

T-5 Identification Without a TAG!