pix
FORDMUSCLE.com FordMuscle Nav
Late Model AOD to T5 Conversion
Transmission Installation
[Page 1 | 2 | 3 ]
We obtained the T5 and associated parts with under 60,000 miles from a wrecked 92 5.0.

Removing the AOD and installing the T5 is very straight forward. If you are not working on a lift, you'll want the car jacked up as high as possible on jackstands at all corners. This should allow enough room for AOD to be pulled out from under the car. We recommend you drain the AOD before taking it down, otherwise you'll be in for a huge mess when you remove the converter.

Of course you'll need to remove the driveshaft and starter, both of which will be reused with the T5. Disconnect the cooler lines, after the case is drained! (The lines have to be cut to remove them completely from the car.) Finally remove the speedometer cable and gear, the throttle and TV cables, and the electrical connector. The bellhousing bolts are hard to get to, we found that using a long (24") 3/8" extension and a wobbler socket attachment made it a breeze, especially reaching the two bolts at the top of the bellhousing.

The T5 goes in just as if you were doing a clutch job. We used a stock flywheel and had it resurfaced to ensure trouble free operation with our SPEC clutch. Be sure to connect the electrical connectors outlined below and
don't be alarmed if your car doesn't start after the swap, you probably did not connect the neutral saftey switch connections correctly. Double check the connections at the pedal and at the transmission. Many times the plastic rod on the pedal switch is not adjusted properly, so double check it and adjust as outlined below. If the engine still does not start, remove the two connectors at the pedal and re-install the jumper wires. This will bypass the saftey mechanisms and the engine should start. (Be sure the shifter is in neutral and your foot is on the brake before you turn the key!) It is possible your pedal switch is bad, you can purchase a new one from Ford.

Make sure you've got fluid in the T5 case before you take the car for a test drive. Check for any unusual vibration or poor clutch operation. Our clutch engagement was a bit low at first, but using
the Fortes firewall adjuster we easily adjusted the cable tension until the clutch engaged about half-way up off the floor.

After a couple weeks of driving the T5 car, we're absolutely thrilled with the conversion. The SPEC clutch is incredibly smooth. You can lug the car at idle with your foot off the throttle, in first or second gear, and the clutch will not chatter or stall the engine out. The car is a blast to drive and acceleration had improved dramatically. G-Tech numbers show a increase in the 1/4-mile trap speed from 107 mph (AOD) to 111 mph after! (Keep in mind the G-Tech measures true mph at the end of the 1/4-mile, whereas at the dragstrip the speed is an average over a distance at the end of the track.) We'll take the car to the strip in the next couple weeks to see how much we improve over the best of 13.59 @ 102 with the AOD. F/M


1. Removing the AOD is simply a matter of disconnecting everything that's attached to it. Be sure to remove the four converter bolts or nuts. Wedge a screwdriver between one of the slots in the flywheel and the block plate to keep the converter from turning as you loosen the bolts. 2. When all the cables and fluid lines are disconnected and the bellhousing bolts are removed, the AOD can be lowered down. It's heavy, so keep it level! 3. With the AOD out of the way, remove the flexplate and blockplate. We'll reuse the flexplate bolts for the manual flywheel.

4. No job is complete without using the trusty 4" grinder at least once!
We found that the lower AOD shift plate would not fit through the shifter opening. Since we weren't in the mood to spend and hour removing entire console, we simply cut the bracket so it could be bent and pulled out.

5. Here is the AOD shifter assembly that gave us trouble. The two halves were actually riveted together, so we had to drill the rivets out. The top half came right out, but the throttle cable bracket on the lower half made it impossible to remove. We cut the plate (arrow), which allowed us to bend it an yank it out. The plate can still be used with a little tack welding. 6. Be sure to install the pilot bearing! A little moly on the outside and a socket and hammer is all that is needed to tap it into place. Now is also a good time to replace the rear main seal for good measure.
7. The T5 dustplate goes on followed by the flywheel. We had the stock flywheel machined beforehand. Be sure to install the pressure plate locating dowels! We reused the AOD flywheel bolts. Use a dab of RTV on each and torque to 90 lb.ft. The clutch goes on next . Torque the pressure plate bolts to 25 lb.ft. 8. Install the new throwout bearing on the clutch fork, then bolt the bellhousing to the block. You'll need a few new bellhousing bolts, as some of the AOD bolts are too long and bottom out in the block. Take an AOD bolt to the hardware store and get four new grade 5 or 8 bolts, one-inch shorter. 9. The T5 is finally bolted to the bellhousing.( Be sure to have the correct metric T5 to bellhousing bolts beforehand! ) Your existing AOD crossmember and mount will work.
10. The T5 uses a shorter speedometer gear, available from Ford. Don't order the same tooth count however! Use this site to determine which gear you need. 11. There are two electrical connection to make on the T5. This harness contains the reverse lights and the neutral safety switch. The left end connects to the terminals on the T5 case, the other end connects to the harness hanging under the car -the same one the AOD connected too. 12. This harness that hangs off all T5 cases won't be used. On factory T5 cars it connects to a harness exiting under the floor pan, however this entire harness and circuit is not found on AOD cars. As we mentioned earlier, without this harness in place you cannot use the self test features when using a T5 processor.
13. Reinstall the driveshaft. Use Loctite red on the driveshaft bolts and torque to 90 lb.ft. Reinstall the starter, and fill the case with 2.5 quarts ATF. 14. We recommend using the stock rubber insulator, as it keeps noise and fumes out of the car.Only the two of the four holes line up, which was fine with us. You could drill the tunnel to attach the other two screws.
Note the AOD shift position light harness - disconnect it.
15. Last but not least, attach the end of the cable to the clutch fork. Don't forget the retaining clip (arrow). There is also a cover (not shown) that seals up the fork and opening from moisture and dirt, you can see the black RTV outline for where it goes. Both are available from Ford if you don't find them used.



Sources:

SPEC
(Start Performance Engineered Clutches)
3420 Davey Allison Blvd.
Hueytown, AL 35023
ph. 800-828-4379

Fortes Performance Parts
474 Moody St.
Waltham, MA 02453
ph. 781-647-1530
http://www.fortesparts.com/


pixblue
pixblue
Tech Archives Project Cars Readers Cars Feature Cars