AOD Shifting Very Late

91StangGT5.0 · May 21, 2011

I have a 91 LX AOD shifting at high rpm. It's typically shifting at around 3500 rpms and letting off the gas. It's got a new transmission that has been built up and has a "Transgo Full Race shift kit". TV Pressure has been checked by multiple ford mechanics and other mustang specialists and they say the transmission is working fine and that it's more than likely the shift kit causing the shifting. Somehow, I feel that it may not be the shift kit. It's a new transmission that was pre-built with high performance parts, so I don't think the governor or valve body is stuck in someway.

Will post a video soon of the issue for better illustration.

""If the TV cable is not connected the transmission will default to full TV pressure. If TV pressure is full shifts will only occur at the wide open throttle shift point, which is usually around 4900 RPM. This means that even at light throttle you would have to get to 4900 RPM to get a 1-2 shift." --Sounds like I have too much TV Pressure as this sounds about like my issue." - Baumann

Is there any truth to the above statement?...My cable is attached by the way.

azandford · May 21, 2011

YES, i had a similar problem.

i cant expand but i know that i messed with the cable until it shifted sooner

giddyup306 · May 21, 2011

91StangGT5.0 said:
I have a 91 LX AOD shifting at high rpm. It's typically shifting at around 3500 rpms and letting off the gas. It's got a new transmission that has been built up and has a "Transgo Full Race shift kit". TV Pressure has been checked by multiple ford mechanics and other mustang specialists and they say the transmission is working fine and that it's more than likely the shift kit causing the shifting. Somehow, I feel that it may not be the shift kit. It's a new transmission that was pre-built with high performance parts, so I don't think the governor or valve body is stuck in someway.

Will post a video soon of the issue for better illustration.

""If the TV cable is not connected the transmission will default to full TV pressure. If TV pressure is full shifts will only occur at the wide open throttle shift point, which is usually around 4900 RPM. This means that even at light throttle you would have to get to 4900 RPM to get a 1-2 shift." --Sounds like I have too much TV Pressure as this sounds about like my issue." - Baumann

Is there any truth to the above statement?...My cable is attached by the way.

Well it sounds like it's your shift kit. The smoking gun is "full race shift kit". You can check the TV adjustment if you want. It's very simple.

YouTube - ‪Ford AOD TV cable adjustment‬&rlm;

Another thing you need to check is fluid level. If your level is low it will cause late/ hard shifts.

If both of these are okay, then it's something inside the transmission.

91StangGT5.0 · May 21, 2011

giddyup306 said:
Well it sounds like it's your shift kit. The smoking gun is "full race shift kit". You can check the TV adjustment if you want. It's very simple.

YouTube - ‪Ford AOD TV cable adjustment‬&rlm;

Another thing you need to check is fluid level. If your level is low it will cause late/ hard shifts.

If both of these are okay, then it's something inside the transmission.

I'm very familiar with this youtube video. I own his whole DVD set on the AOD. I've set it to just slightly tenser than what he said, only to try and compensate with some extra pressure. Maybe I set it too high? I'll find out tomorrow and adjust it in the neutral position and see if that helps. I just know that for some reason my adjustment block that moves on the TV Cable appears closer to the front of the car than his and there is slight tension. I'll readjust tomorrow and post results.

giddyup306 · May 21, 2011

91StangGT5.0 said:
I've set it to just slightly tenser than what he said, only to try and compensate with some extra pressure. Maybe I set it too high?

Here's your problem (at least part of it). The shift kit already gives you more than enough application pressure to the clutches.

91StangGT5.0 · May 21, 2011

giddyup306 said:
Here's your problem (at least part of it). The shift kit already gives you more than enough application pressure to the clutches.

To recap. The Full Race Shift Kit will make it shift like this? Also, will readjusting the TV cable make it shift lower? If so, by how much.

giddyup306 · May 21, 2011

91StangGT5.0 said:
The Full Race Shift Kit will make it shift like this?

More than likely. If you've had Ford techs, and Mustang experts already look at it, the forum probably can't give you any other alternative opinion.

91StangGT5.0 said:
Also, will readjusting the TV cable make it shift lower?

If you over adjusted it, then yes.

91StangGT5.0 said:
If so, by how much.

Depends on how far you over adjusted it.

91StangGT5.0 · May 22, 2011

From what has been told to me, adjusting for too much pressure will make it shift at high rpm because it thinks it is in WOT. The ford techs never drove the car just they just adjusted it.

91StangGT5.0 · May 22, 2011

Here is a video I took on impulse when I drove the stang around the block of my neighborhood. At no point of this recording am I going farther than 1/2 throttle. You can easily notice later in the video that I do get on it very briefly ( no more than. At the beginning I'm going at slight throttle all the way until I say something in Hungarian to myself ("It's crazy"). After that I'm going at about 1/8 throttle until I turn again. At about 1:28 I push it to about 1/2 throttle very briefly then slow to about 1/8 throttle until I turn again. At 1:50 I'm pushing very very slightly on the throttle because I'm turning again quickly back to my street. Note that it just creeps to 3200 RPM then shifts on it's own. All shifting is pretty firm, which feel fan-****ing-tastic, especially if I go at WOT it will very easily chirp into 2nd and sometimes 3rd.

View attachment 188361

EDIT: I've also took all the tension off the TV Cable and have it in the neutral position...and still shifts the same. It shifts no different if I give it very slight tension or very slight slack. I've also got to redo my base idle...I know.

AOD Shifting Very Late

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