After years of dreaming and months of planning I’ve finally embarked on this project, the last real project on my car. The 700R4 has held up and was nice to drive for years but I just can’t love this car fully with an automatic. So here we go. I read loads but never found a single comprehensive thread about the job so I’m going to make one. Please leave questions etc. and I will try to answer so future members can have everything in one place.
Transmission: I bought a rebuilt T5 from a transmission shop in Anaheim that builds and sells all kinds of boxes. I had them machine the input shaft down from the ford size (.67") to fit the jag bushing (.49") and shorten the tip 1/8". I had it shortened because Paul at Medatronics says sometimes the input shaft bottoms out in the crank and I didn’t want to have an issue at the last minute, so I preemptively shortened it. I will still measure before it goes in just to be sure. The other thing you need to do with these transmissions is to swap the Ford front bearing retainer plate with a long shaft Camaro unit. It’s got a slightly smaller diameter and fits the bellhousing, the Ford one is too wide and doesn’t fit. I got a regular sized T5, realizing the shifter will be a little farther back, but I don’t care, and it’s easier to just buy a regular mustang trans than trying to swap stuff around to make it shorter.
Here’s the medatronics bellhousing from Paul C in Florida. It’s a really nice unit, very light, fits the trans and the block perfectly. The threads for the clutch slave aren’t quite right so I will need to figure out the right bolts to mount that but I’ve test fitted everything and all looks great. The starter mounts have inserts that allow starter placements for both the 104 and the 133 teeth flywheel, so it works for either set up. Very nice unit and seems worth the price.
I sourced an original flywheel from a forum member, that was drilled for both 10" and 9.5" clutches. Paul C recommended 10" as it’s cheaper, works just as well, and easier to find the correct clutch disc. The jag clutch disc is actually close to fitting the mustang splines, but a mustang 10" disc is obviously the perfectly correct unit. I got it from Rockauto for like $40. I believe it’s from an 84 Mustang. I had the Flywheel and Clutch plate balanced locally.
I got a Pro5.0 shifter which is widely thought of as the best shifter ever made for the T5. A stock trans mount which will be adapted to my current mount, and a matching gear reduction starter motor. The flywheel teeth have to match the starter. 104 vs. 133 I believe. Also a stock T5 yoke to be adapted to my driveshaft.
Finally, all the little bits.
- Master Cylinder
- Clutch fork, pivot shaft, grub screw, adjustable push rod
- Two hard clutch lines, one stainless flex hose
- Throw out bearing and clips
- Pilot Bearing
- 10 Flywheel to crank bolts and locking plate
- 6 Clutch plate to flywheel bolts
- 10+ bellhousing to block bolts
- Two triangular brackets that bolt between bell and block (had to source as not present on automatic cars)
- Two small rubber pedal pads
… I think that’s everything. One thing I have not yet figured out is how to adapt my stock speedo cable to the T5. Mostly likely I will just blank the speedo gear hold and leave it as is. I’m ok without a working speedo for now. Unless someone know a clever solution. So that’s everything. Next post will be the first day of work.