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Discussion Starter #1 (Edited)
I have some TECH questions regarding an AOD. I installed a Buemann shift kit a few months back. I love it. I am getting ready to swap gears in the car (1990 Lincoln Mark VII LSC). I rebuilt the tranny with Kevlar clutches, Kevlar Band, and 2500 Lock up stall, and did the shift kit in a "NEW" Ford VB at about stage 2.5 - all this at the same time. Still have stock 5.0HO.

As I mentioned I am going from 3:27 gears to 4:10's. Currently I have a few different things I would like to change about the shifting even before the gear swap....so I would like to know how the gear swap will affect these "shift characteristics."

1) I would like to know how this will affect the current settings in general with I have the VB set at? Will it feel as though it shifts sooner, or softer - maybe harder? That is just one thing I would like some insight on before I swap the gears.

2) Since the rebuild, the rear control arms have been beat to death! The bushings are shot and the whole shift feel lately has been sloppy and not near as tight as it was a few months ago. I have contributed this to bad bushings. I have not put more than 5000 miles on the rebuilt tranny. I have the shift kit set at 2 - 2.5 with the harshness and the shift happens at WOT around 4800. I hope new poly bushings in the rear will solve the not so tight shift - it used to bark the tires...4000 miles later, it no longer is. Why? Could the bushings be that shot, there is enough play in the rear it will not feel like it is shifting tight?

3) Now that I have mentioned the Shift characteristics I used with the kit, how will these settings be affected how the 4:10 gears feel?

Here are some of the things I would like to change about the shifting:
4) I am sure folks ask you about this alot, Overdrive shift is pretty hard. I was not expecting OD to come in so hard. I did not mess with the OD shift from what I remember. Does a harsh OD shift hurt the tranny?

5) My biggest question, In general the DOWN shifts do not shift HARD enough. If you are in 3rd, mash it, 2nd comes in soft like factory. Same goes for 2nd to 1st under power. I would like to know how to increase both the SPEED and HARSHNESS of the downshifts.

6) The car right now will hold 3rd quite well, problem is - it takes alot of peddle to jump down to 2nd. I would like 2nd to come in faster when I push the peddle. I don't want 4th to shift down any faster right now......I am scared that after the 4:10 gears go in I will want it to hold OD more, instead of ramping the RPM to catch 3rd just to pass a slow moving bus!!

7) last thing. 2nd gear feels like an intermediat gear. It doesn't hold out in the RPM as long as 1st does and it shifts TOO EASY into 3rd. Is there a way I can modify the VB to help hold 2nd longer at WOT (without doing the 1-D-1 sufflle)? Is there a way I can make it not shift to 3rd so easy.....hold 2nd at light throttle?

I am NOT really interested in dropping/tearing the tranny apart again before the swap.....but if that is the ONLY way to change these things please tell me and we will go from there. I am not a tranny expert, but I know the workings and have rebuilt a few AOD's. I just finished a LINTEC Street Terminator for my friend in his T-Bird SC....I decided to use your products in the Lincoln. I am happy and still have money in the bank - unlike my friend.

Maybe you folks can help. I as mentioned above...I know my way around an AOD pretty good - just need a little guidence.
 

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Wow, there's a lot of topics here. Let's deal with the gears first.
Keep in mind most of my experience is with the electronic versions of this trans, but I think the general trends will be the same.
You added a shift kit. The shifts will be firmer, and appear to be at a lower RPM than before. The shifts really start at the same time, but they are completed faster. When you add lower gears, the engine accelerates faster, allowing more RPMs to go by before the shift completes. These two effects counter each other. As for firmness, the lower gears will make the shifts more harsh. Maybe not a lot, maybe so depending on the shift kit.
The harsh overdrive shift was either a hole that was drilled, or a spring changed in the VB .. I've never had a baumann kit to tell you exactly what they did. It's harshness has a little to do with the way the direct clutch is on an AOD, the TC is in full lockup in 3rd and 4th gears, so those shifts may seem rougher for that reason. It's a little tougher on the hard parts but you desire a firmer shift with the kevlar band due to it's frictional properties (as per Jerry's article). The firness will help stop the drum faster and make less heat/wear.
The problem with the soft downshifts is unfortunately the rush job someone did on designing this kit. There are different holes in the VB for upshifts and downshifts, and apparently the kits instructions don't do both, or dont do both in the right proportion. Again, there may be a valve or spring change that affected this, but without my AOD manuals and the kit to look over, it's hard to tell.
 

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Johnny Five is Alive, TCCoAAC Member
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Call Greg @ Bauman.

http://www.becontrols.com/aboutus.htm

Greg is usually pretty helpful..

I don't think there are many "AOD" Gurus here, Most of use are familier with the "E" version.
 
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