C4 to T-5 Swap

This page details the T5 swap into my Mustang.

To begin, a few details regarding what the Mustang started out as:

1966 Ford Mustang
Stock 66 200 cubic inch Inline-6 Engine Block
Stock 66 C4 Automatic 3-speed "Cruise-o-matic" Transmission
Stock 66 C4 to Engine Bellhousing

The Parts List
Putting together a parts list turned out to be a little more extensive than I had thought.  There are a lot of little parts we forget about when doing the swap, and they add up very quickly.  Here's my parts list of my particular swap:

Bellhousing
The C4 Auto bellhousing will obviously not work (lack of hole for clutch fork, will not bolt up to manual trans, etc.).  Using information from this helpful website, I found that I could use a bellhousing from a 1967-197? Ford Mustang containing a 200ci Inline-6 and the stock 3-speed manual transmission. I was pleasantly surprised when I came across a nearly complete 1967 Ford Mustang Coupe, with the necessary engine and transmission. 

Clutch fork
This was removed from the same vehicle listed above.


Throwout bearing
This was removed from the same vehicle listed above, but I will purchase a new one as I don't want to use a very rusty, nearly immobile, bearing.

Block Plate
This was removed from the same vehicle listed above.

Flywheel
This was removed from the same vehicle listed above.  Note that this bearing is the larger 9" 'flat' flywheel, as opposed to the smaller 8.5" 'recessed' flywheel used in 1965 & older vehicles.  So, I could have pulled a flywheel from a 1966, but since the vehicle listed above had it already, I bought it as well.

Note: the bellhousing, clutch fork, throwout bearing, block plate, and flywheel set me back $60.  Not bad.


T-5 Transmission
Bought from a 1987 2.3L (4-cylinder) Ford Mustang.  The transmission gear ratios for this are as follows:

1. 3.97
2. 2.34
3. 1.46
4. 1.00
5. 0.79

The advantage of the higher 1st gear (as opposed to a V8 T-5 whose 1st ratio is 3.35:1) is that it seems to fit better with the very torque-heavy inline 6.  Also, they're cheaper ;-)

T-5 Crossmember
This was purchased new for a 65-66 Mustang.  They are often seen on eBay for ~$80; I got mine for $92 shipped.  You could fabricate one yourself, also.



T-5 Transmission Mount
This is really just a manual transmission mount for the vehicles listed above. I ordered this from Rockauto.com for $3.95. 

T-5 Adapter Plate
This can be purchased new for a 65-66 Mustang.  To find out which one I needed, I looked at this page again, and found that I have a "C6 block," as opposed to a "C5 block."  The "C6 block" is also referred to as the "dual pattern block."  Now that I know what block I had, I found that I needed to purchase a T-5 adapter, such as the 2nd one listed on Modern Driveline's website.  *However, instead of purchasing it from Modern Driveline (about $170), I bought one off of eBay, for $113 shipped to my door.  Same part, 2/3 the price.*  After getting it, I realized I'd have to drill a few holes.  You can read more on this procedure in this post, about 3/4 the way down.  Here is a picture of the adapter, before modification.



Shifter
The stock T-5 shifter is junk, in my opinion.  I highly recommend against using it. I will likely purchase a Steeda Tri-Ax shifter, but any shifter for an 87-93 Ford Mustang T-5 should work.

Clutch Kit
The stock pressure plate for the Mustang's manual transmissions was a 3-finger design, and better "diaphragm" types exist now.  I will be purchasing my clutch kit from Rockauto (RHINOPAC P/N 07004), which fits a 1981 Ford Mustang 200ci.

Clutch Pedal and associated linkages/parts
The stock "Z-bar" will work fine with the T-5, but you can also go to a cable-clutch or hydraulic clutch. I purchased, from someone converting to an automatic, the following parts:

• Brake pedal (the pedal pad is narrower on manual cars)
• Clutch pedal
• Equalizer bar - aka "Z-bar"
• Lower clutch rod
• Upper clutch rod
• Z-bar frame mount
• Z-bar engine mount
• Clutch pedal stop bumper
• Clutch pedal spring bracket

There are a few other parts as well, but I was not able to acquire them.  The total price of the parts above was $50, plus my automatic brake pedal (swapped with him).

The below parts I do not have complete information on, but they will likely need to be purchased.
Shifter Boot Trim
Shifter Boot
Speedometer Gear
Flywheel Bolts
May not be necessary as they are the same as those off of an automatic's flexplate, and mine were new.
Roller Pilot Bearing

Pilot Bearing Alignment Tool
Driveshaft/Yoke
If yours needs to be shortened, you might try one from a 1985 Thunderbird with a V6 and AOD.

This thread, on the Fordsix Performance Forums, is priceless in the amount of knowledge it provides for this swap.  Check the links inside the thread, as well.