Join Date: Sep 2002
Location: Geelong Australia
I ran an AOD behind an XD 4.9 with the original column auto. It was a pretty easy install, except for the hassles of making all the bloody linkages. I was able to cut and widen the link that ran under the box and make a new mount where it was supported. The link up to the selector on the box was easy as was the selector itself.
The rear mount for the gearbox needed to be moved to the rear mounting holes on the body, but the tailshaft was OK as was the speedo drive.
I found that the original exhaust on the L/H interfered with the new linkages by about 25 mm where there was originally 25 mm of clearance. The R/H didn't interfere at all though.
A couple of points that you need to be aware of:
The AOD doesn't have a kick down linkage like the C4/C10 or FMX. It uses something like a "throttle position and speed of movement" set up. It’s a real hassle to set up right.
It has move continuously with the throttle and over the correct arc of movement. I ended up having so many holes in the throttle link it looked like it had been lightened. But if I remember, one of the standard holes on the Carter Thermoquad did the job in the end.
I also cheated and cut up the original “kickdown” link. I welded in a 6mm Nut in the end and then used a piece of 6mm threaded rod and a rose joint to adjust the length of the link.
I took it back the Auto Transmission Guy who I bought it from for the fine tuning.
I found that the diff ratio that I was using (2.74:1) was way to low for the 4.9. At 100km/h the old girl was ticking over at a little under 1,500 rpm. The solution was to fit a 3.23:1 ratio that was common in utes. This also corrected the 12-13% speedo error that I found that I had. (Thanks Mr. Plod!) In the end it would happily cruise along at 100Km/h with about 1,750rpm on the tacho.
The AOD has a “Locked” over drive and was designed for economy not performance, don’t try to tow or the like in OD, it will not like it one bit. Also the lock outs on the gear selector are like this
P R N OD/D 3 1 It will kick down to third or second from OD but I found it was best to do the thinking for a kick down. It would change up in to OD at about 70Km/h.
It can not hold 2nd Gear. But that also means that your existing selector (T-bar or Column) will still work without mods.
I got 200,000kms out of it before I sold it and except for a destroyed torque converter when a brother in law took the old girl up to 6,000rpm in a fit of %^%#@, all was well.
Best of luck.