AOD Upgrade Help
I'm halfway through the build up of my Ford AOD using the upgrades available from Baumann. I've noticed that the new stamped steel reverse drum does not have the three recesses for the No.2 thrust washer that the cast drum has. I assume that there is a different washer for this style drum, does anyone have the correct part no. ? My other concern is the snap ring that secures the sprag on the back of the reverse drum. I've heard reports of this parting company at high revs and causing serious trans failure. Does anybody know if this is still a concern with the later style 'Mechanical Diode' set up that I'm fitting ?
Sounds like you're going the right direction!
Like I'd like to but the necessary amount
hasn't fallen out of the money tree yet!
I've got some of the stuff done, but not
the mech diode or wide ratio gearset.
The link is a little ditty I wrote up after
doing my own upgrades and doing a couple
years of research.
Just in case it might help with a point
I'm pretty sure somewhere in that mess of links are
some pretty good breakdowns of the parts in the various
models, maybe will help with the thrust washer question.
If you know exactly what model trans your new drum
is out of, it should help you find the corresponding thrust
washer or perhaps caged needle bearing, or whatever.
SAY!! Are you by any chance using an AOD/E or 4R70W
stamped direct drum and especially the splined hub in
the middle of it? I've been trying to find out if
those will work with the AOD center/direct input shaft,
or if the splines are different between the /E & 4R stub
shaft from the AOD long shaft?
Any info appreciated!
Last edited by macx; 05-17-2005 at 07:35 PM.
Thanks for the reply Macx. I believe my Stamped Steel direct clutch drum is out of a AOD/E and it fits the centre I/P shaft fine. I started planning my AOD rebuild two years ago and at the time, there was very little information available for upgrading. Baumann, Art Carr and Lentech were the only companies I could find. I started the rebuild recently and noticed there is a load more info out there now, like the the links you've mentioned.
I went with Baumann and for my engine specs, they recommended going to the late model stamped steel drum due to its increased capacity (take a look at www.altousa.com/ib49754a.htm ) I ordered my drum from Baumann as the Ford dealers in the UK didn't want to know. I'll email Baumann again and see if they help out with my ???'s
When I did the first rebuild and some upgrading on mine
several years ago, I got a stamped steel direct drum for it.
I'm unsure, however, if it was from an early 90's AOD when, I later learned, they went to the stamped drum, or was it from an AOD/E. I got it thru Art Carr where I got the rest of my rebuild kit for that rebuild.
Good luck on your rebuild!
You wouldn't happen to know if the forward clutch drum
on an early 90's AOD changed to stamped steel also, like the direct and reverse did? I have reason to
think it is, but haven't been able to verify that. Of course can't use one from an /E or 4R because of the differences in the shafts.
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