Proper AOD Shifting
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Lead Driver
Joined: Aug 2002
Posts: 6,682
Likes: 12
From: Saskatoon SK Canada
Proper AOD Shifting
I'm wondering what the proper RPM that a '90 AOD should shift at as I've recently installed on in my '51 truck. The TV is set good. On mine it shifts from 1st - 3rd at 3000 RPM, then 3rd - Overdrive at 3000 RPM. Since the truck isn't road worthy yet I've been only driving around my field which I've only done acceleration. The field isn't long enough to see if the overdrive will kick in when driving a constant speed. Thanks
More Turbo
Joined: May 2004
Posts: 544
Likes: 8
From: BC, Canada
I think the way you drive will determine which is the proper RPM for the shifts. If you are heavy footed, you adjust the shift one way, or, if you ***** foot it a lot, then adjust it the other way. When I got my '90/4x4/302/AOD/3.55, it shifted a bit too early for me. I just kept adjusting it, a little bit each time until it felt right for my taste. I wish I had a tach though, so I could give you a real answer. ...Terry
More Turbo
Joined: Dec 2002
Posts: 705
Likes: 2
From: Halifax, NS
LOL.. the profanity filter didnt think you were talking about felines, i gather.. hehehh
i am also in trials with an AOD in my rig. I have erred on the side of caution initially, and set my tv pressure high. Be EXTREMELY careful with this adjustment, as its not like a typical kickdown. (as in C4 or C6) If you set the kickdown too low, you can destroy the tranny.
you must also consider that this transmission may shift at different points then you would expect, especially if the rear end ratio in your truck is a lot different than the vehicle the tranny came from.
In my case, the truck i put an AOD in has 4.10 gears, and I havent determined yet if that will pose a serious problem. I certainly know the LTD the tranny came from definitly didnt have 4.10's ..... lol..
good choice on a '90 model tho, they have a crucial tailshaft modification that will help prevent failure.
I'd go with a good-sized tranny cooler, as well as a temp gauge installed, so you can monitor the fussy bugger... these arent known for being bullet proof..
i am also in trials with an AOD in my rig. I have erred on the side of caution initially, and set my tv pressure high. Be EXTREMELY careful with this adjustment, as its not like a typical kickdown. (as in C4 or C6) If you set the kickdown too low, you can destroy the tranny.
you must also consider that this transmission may shift at different points then you would expect, especially if the rear end ratio in your truck is a lot different than the vehicle the tranny came from.
In my case, the truck i put an AOD in has 4.10 gears, and I havent determined yet if that will pose a serious problem. I certainly know the LTD the tranny came from definitly didnt have 4.10's ..... lol..
good choice on a '90 model tho, they have a crucial tailshaft modification that will help prevent failure.
I'd go with a good-sized tranny cooler, as well as a temp gauge installed, so you can monitor the fussy bugger... these arent known for being bullet proof..
Last edited by Craigwell; Nov 12, 2004 at 11:59 PM.
Thread Starter
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Lead Driver
Joined: Aug 2002
Posts: 6,682
Likes: 12
From: Saskatoon SK Canada
I had a tranny cooler put in my radiator. The truck has a 4.86:1 ratio but with 32" diameter tires. That's why I found a '90 tranny out of a crown victoria with 97 000 kms.
More Turbo
Joined: Dec 2002
Posts: 705
Likes: 2
From: Halifax, NS
right on.. i drove mine home today after it was painted last night. It happens to be the first snowfall here today, so i got to test out 4 HI function as well..
Everything worked fine, but it seems to hold the gears just a little too long, but as i say, i installed it with the tv pressure on the high side to be safe.. now i'll adjust it down a bit. I am really impressed with how the 300 6 pulls along with the 4.10s. the OD definitly seems to keep rpms low..
it was only the second time i drove it since putting it together. (first time being the trip to the paint shop, as ya may have guessed.. hehe)
i have had numerous bad experiences with tranny coolers in rads, and now always purchase (or usually fabricate) my own tranny coolers that sit in front of the rad.
i agree with overkill... id just set your tv cable to allow the tranny to shift where you want, but be careful that you dont adjust the pressure too far downward in your quest for the shift you want.. maybe then the ratio factor becomes a problem..
Everything worked fine, but it seems to hold the gears just a little too long, but as i say, i installed it with the tv pressure on the high side to be safe.. now i'll adjust it down a bit. I am really impressed with how the 300 6 pulls along with the 4.10s. the OD definitly seems to keep rpms low..
it was only the second time i drove it since putting it together. (first time being the trip to the paint shop, as ya may have guessed.. hehe)
i have had numerous bad experiences with tranny coolers in rads, and now always purchase (or usually fabricate) my own tranny coolers that sit in front of the rad.
i agree with overkill... id just set your tv cable to allow the tranny to shift where you want, but be careful that you dont adjust the pressure too far downward in your quest for the shift you want.. maybe then the ratio factor becomes a problem..
Junior User
Joined: Nov 2003
Posts: 85
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What carb are you using? I'm considering this swap on my 65 but don't want to go to a different intake and carb setup just yet. I'm running a 300 with the granny 4 speed and I'd like to keep the lower gearing for towing occasionally. (gotta bring home new projects somehow! 
) Are there any problems that you ran into that I need to be aware of? All the information you could share would be greatly appreciated. Thanks in advance.
) Are there any problems that you ran into that I need to be aware of? All the information you could share would be greatly appreciated. Thanks in advance.
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More Turbo
Joined: Dec 2002
Posts: 705
Likes: 2
From: Halifax, NS
i have a lot of pics and info in my gallery.. i am using the stock carb/intake setup on the 300, and i fabricated my own tv cable setup.. motorcycle or bicycle brake cable will do it... you'll want something thick enough to hold up, cable-wise tho...
mine seems to have plenty of power with the stock six.. i pulled a friend out of the ditch last night no problem.. our first snow of the year was a blizzard that nobody expected...
http://www.baumannengineering.com/tvlnkage.htm
this discusses the tv cable and advises on how to set it up.
is your truck two wheel drive or four?? as noted in the other posts about this, you want a 90 or newer AOD for durability, as well as a tranny cooler.. a gauge is useful to be sure your temp is good.. (below 180 degrees)
mine seems to have plenty of power with the stock six.. i pulled a friend out of the ditch last night no problem.. our first snow of the year was a blizzard that nobody expected...
http://www.baumannengineering.com/tvlnkage.htm
this discusses the tv cable and advises on how to set it up.
is your truck two wheel drive or four?? as noted in the other posts about this, you want a 90 or newer AOD for durability, as well as a tranny cooler.. a gauge is useful to be sure your temp is good.. (below 180 degrees)
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