AOD Fluid change myth
My AOD has about 109k on it. I purchased the car last year at 103k, and I have no idea when the last time the fluid was changed. I can't contact the PO, because the car was purchased at an auction (dealer only).
Anyhow, the car shifts well--nice and firm, with no noticable slipping. I recently did a head/intake swap, and have found that occasionally (only after the swap), when the car is really cold (I live in Southern California, so "really cold" is actually about 50 degrees), the AOD has a bit of trouble engaging into 1st or reverse. I'll start the car, let it warm up for a minute or so, and then put it in 1st. Push the gas, and the engine revs as if the car is in neutral. After a couple of seconds it will engage and off I go. It'll do this for the first 3 - 4 minutes of driving, and then it exhibits no strange behavior.
The tranny fluid is dirty, and definately in need of a change. However, I've heard from a number of different people in real life and on different car forums that sometimes swapping old old fluid in a non-slipping old old AOD can make the AOD slip. This is due, from what I've been told, to the fact that much of the friction elements within the tranny wear off the clutches, but remain in the fluid, and allow the clutches to engage without slippage.
Now, I have no idea if this is true or not. This is the first AOD mustang I've owned, so I'm not too experienced with them. I'd like to swap the fluid, but I'm worried it might kill the AOD. That's not that big of a deal, because if it's bad, I want to fix it. However, I don't have the fundage to fix a bad AOD right now.
Soooo...should I change it? Is the myth accurate? If my tranny isn't slipping now, but has never had the fluid changed, is there a good possibility that it will slip after a change?
Thanks for any and all help!
93 Vert AOD/GT40X/TFS intake/1.7s/73mm MAF/65mm TB/h-pipe/SFCs/4.10s/Tokico Blues/Hawk Pads