T5 vs World Class T5

[BamaMan]

I noticed on the SVO fact sheet that the 85 models have a T5 transmission and the other models have a "World Class" T5. What is the difference between the two except the gear ratio's?

[Merlin]

Mike, as you can see, he probably hasn't spent much time on here like you. He only has 3 posts, not 3,900!

Bamaman, try this: http://www.ttcautomotive.com/English...ice_Manual.pdf

[SVOBart]

This pretty much sums it up:

http://www.5speeds.com/t5/index.html

[BamaMan]

Thanks. I saw the difference in names after I had committed to buying a 1984. As far as durability goes, I assume the WC is better but how much? Would I benefit alot by switching to a WC at some point?

[NY eric]

Thanks. I saw the difference in names after I had committed to buying a 1984. As far as durability goes, I assume the WC is better but how much? Would I benefit alot by switching to a WC at some point?

Dont scrap your car because of it. The WC is an upgrade. I wouldnt kill yourslef for one but if one comes your way for 500 bucks or so then buy it and set it asside for when you do your next clutch.

[venomizd93]

Uhhhh my head hurts can someone translate.........

[tateg]

Something Mike missed in his description; An extra bolt was added between the tailshaft housing and the gearbox for additional stability when the world class box was developed.

As previously stated *ALL* T5's after 1985 are WC. It doesn't matter if they came in a V8 or a 4cyl car. But don't be confused by this, there is a VERY significant difference in strength and durability between the 4cyl and V8 T5.

As a general rule the wider the gear ratio, as in the 4cyl box, the weaker the transmission. The later T5 that came in the '93 Cobra is the strongest production edition of the T5 that came with stock first gear (3.35). It was rated at something like 310ft/lbs (Or maybe 325?) of torque and is called the "Z-spec" because of the"Z" in the part number . It included a new mainshaft with a caged bearing. All V8 T5s after around '91 were rated at 305ft/lbs. All the t5s in four and six cyl models were still rated at the lower 200-250fl/lbs range. The aftermarket and SVO t5's that have the 2.95 first gear all are rated higher (something like 335ft/lbs) but aren't really suitable for a 4cyl because of the very close ratio gearset. These boxes get their strength from the physically larger gears, not from significantly strengthened parts although there are improvements within other than the gears. So for a 4cyl application requiring a wide ratio gear set you are necessarily getting a weaker trans.

Recently there have been some upgrades to the T5 that actually improves the intenals beyond just using larger gears. These upgrades are quite pricey at $1300+ just for the parts and before installation in the trans. G-Force is one of the companies and their transmissions are supposed to be equal to or better than the TREMEC transmissions (yes, I know the T5 is a TREMEC now).

Here's an article on the G-Force buildup with a lot of basic T5 info:

http://www.fordmuscle.com/archives/2005/12/T5Rebuild/index.php

[madadder]

Just to drop a line on the Z-spec.....I used a Z in my 5.0 and took it to 10.77@127 with racing it every sunday and launching at 5000. The only thing that ever failed was I blew all the teeth off the 1-2 sinchro at Maple Grove. It was a smooth ring and a fluke failure. Nothing else ever gave on it. If I ever get a chance Ill grab one again.

[tateg]

Hanlon Motrosports will convert a 305ft/lb T5 to a Z for a reasonable cost. They recommend going to 2.95 on the first gear for additional reliability though.

[BamaMan]

Is the bolt pattern the same on all T5 transmissions. Could I use a T5 out of a 5 l Mustang and have it bolt up to the bellhousing.

[SVOBart]

The transmission to bellhousing bolt pattern is identical. So yes, you can use the T5 out of a 5.0L in your SVO, however the V8 input shaft is of a larger diameter and will either have to be turned down or a bushing will have to be used in the stead of the pilot bearing.

[tateg]

The transmission to bellhousing bolt pattern is identical. So yes, you can use the T5 out of a 5.0L in your SVO, however the V8 input shaft is of a larger diameter and will either have to be turned down or a bushing will have to be used in the stead of the pilot bearing.

I have used T5s from V8s in 4cyls and vice versa. The outer diameter of the pilot bushing is identical in both applications so you can use the 5.0 pilot bushing in the back of the 4cyl crank and a 4cyl bushing or bearing in the back of a 5.0 crank. Just buy the bushing or bearing for the car the trans came from, not what it's going into. FWIW, I pretty much always use the bushing instead of the bearing but the bearings should also work as well.

Another thing to watch out for is on the T5's from '94+ mustangs. The input shaft is about .75" longer than on the '93 and older cars. These newer t5s need the older input shaft installed to be a direct swap.