Vintage Mustang Forums banner

Questions: 67-68 Automatic to Manual T5 Transmission Swap

16K views 6 replies 4 participants last post by  JohnTrotto  
#1 · (Edited)
I am in the market for a 67 or 68 V8, Manual Mustang.
I have noticed the manuals are a bit more rare than the autos, so I have been looking into what it would take to do the auto to manual swap.
If I can get an auto cheap enough, it might be worth it to me to do the swap. Plus it seems I would like the T5 alot more than the stock 4 sp manual anyway.
It would also give me alot more buying options for finding my dream Mustang.

I have found a few writeups, I will list them below.
But they either dont have a comprehensive parts list (at least no part numbers) or arent for the same exact swap or years I am looking for.
Just trying to get all the info on this I can so I can make an informed decision when finding/buying the car.
So I want to come up with a detailed parts list, and what it would cost.

I found that Summit makes a FULL swap kit, including the t5 trans.
But that is waaay more than I want to spend, has a hydraulic clutch setup, (im fine with cable) and includes all new parts, I would rather source the t5 myself.

Then they have this kit, but it seems there is much more you would need.
I wish they had a cable clutch full kit, minus the trans. (and whatever else might end up coming with the trans when I source it)

Couple writeups I have found.


 
#2 · (Edited)
You should also look into Modern Driveline.


It's ultimately dependent on how you want to go about it.

Getting a used T5 out of a later Fox 5.0 is a possible option to save money. I've seen them as low as $250 but expect to spend around $450. I probably wouldn't buy the full Summit kit because you are paying $2000+ for the transmission. If you want the best T5 transmission you can get you buy a used one and rebuild it with the Astro A5 gearset and perhaps the G-Force case. That's as strong as a T5 will get. If you're not making big power, a later stock Fox 5.0 T5 will probably do. But like any drivetrain part there's guys with 450hp and their transmission lasts forever while at the same time there's guys who break them with 250hp. YMMV.

Then the other part is the clutch actuation of which there are three options:

Hydraulic (either internal or external)
Cable
Factory Equalizer Bar

In any of those cases you will need a new cross member for the T5. You should also use a late model diaphragm clutch and eliminate the helper spring in the pedal assembly. You don't necessarily need a kit. For my Toploader swap I just bought everything myself.

If you go with a hydraulic clutch you will likely be using a late model T5 bellhousing and you will need a different length driveshaft.

If you go with a cable clutch, same deal as above and there are header considerations as well.

If you use the factory Z-bar (or equalizer bar) setup you will use a Toploader bellhousing and an adapter plate to bolt the T5 up to it, not totally sure on whether you can use the C4 driveshaft without modification here. If you end up with a late model block you will need bracket for the engine side of the Z-bar, the later blocks do not have a provision cast into them for this.


I'd also look into the Mustang Steve roller cutch pedal assembly. What I did was buy the bracket and pedals off ebay and sent them to Mustang Steve for modification.

You'll also want a good Flywheel. I bought this one:

 
#3 ·
Thanks for the reply,
I think I am going to go with a cable clutch setup, I heard it reduces the clutch pedal pressure over the stock Z bar setup.

I dont plan on running big HP, just a 289 or 302 with a few bolt-ons.

Just tough to figure out all the parts needed, when there are so many options and ways to go about this.
 
#4 ·
As many Mustangs as there are out there, you'll find some for sale that already have five speeds. Unless you are just set on doing the swap yourself.
 
#6 ·

There is my thread on when I converted my 69. Might have some helpful pictures and insight. I sourced my T-5 complete with a new clutch from a local message forum for $600. Other other swap parts were from MDL.

As a note, the Cable setup, which works great BTW, does NOT work with long tubes, I tried, lol.