All gears go forward!!

All gears go forward!!

Marc
Marc

April 29th, 2012, 1:46 pm #1

87 5.0 HO AOD Transmission. Everything seems stock. (Just picked up car for my daughter a few months ago).

Before work began on car, tranny was slow to shift down to 1st, and reverse began to fight. So, Put it in the air, dropped pan, took out valve body. Took Valve body apart, cleaned, and reassembled Valve body with added shift kit parts.

During that time, I noticed the TV cable was disconnected from the Throttle body. Not sure how or why, but it was, so I reconnected it.

Fixed charging issue, ripped out A/C components, and fired her up.

Low works well. The car now really really likes going forward. Neutral... goes forward. Reverse, yup, goes forward. BUT, when in reverse, if I quickley give it gas, when the RPM's drop back down, the tires stop moving (Car is still on 4 jack stands) Park was being a pain.

Dropped pan again, checked valves, checked check balls. Went through everything on valve body, put it back up, same thing, but park seems happy again..

Im really lost on this one. I have only seen a couple posts online about such a thing, but seems I cant find an answer.

Oh, almost forgot, I did take the governor out and clean it well, and made sure to put it back in properly.

Im way lost on this, so any help is really appreciated.
Thanks in advance.
Marc
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Joined: July 17th, 2011, 7:07 pm

April 29th, 2012, 2:03 pm #2

Sounds like the manual valve is not properly indexed to the linkage.
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Marc
Marc

April 29th, 2012, 4:09 pm #3

I made sure the pin was properly set in the manual valve when I set the valve body back in. Could the TV cable adjustment be the problem?
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Marc
Marc

April 29th, 2012, 4:28 pm #4

87 5.0 HO AOD Transmission. Everything seems stock. (Just picked up car for my daughter a few months ago).

Before work began on car, tranny was slow to shift down to 1st, and reverse began to fight. So, Put it in the air, dropped pan, took out valve body. Took Valve body apart, cleaned, and reassembled Valve body with added shift kit parts.

During that time, I noticed the TV cable was disconnected from the Throttle body. Not sure how or why, but it was, so I reconnected it.

Fixed charging issue, ripped out A/C components, and fired her up.

Low works well. The car now really really likes going forward. Neutral... goes forward. Reverse, yup, goes forward. BUT, when in reverse, if I quickley give it gas, when the RPM's drop back down, the tires stop moving (Car is still on 4 jack stands) Park was being a pain.

Dropped pan again, checked valves, checked check balls. Went through everything on valve body, put it back up, same thing, but park seems happy again..

Im really lost on this one. I have only seen a couple posts online about such a thing, but seems I cant find an answer.

Oh, almost forgot, I did take the governor out and clean it well, and made sure to put it back in properly.

Im way lost on this, so any help is really appreciated.
Thanks in advance.
Marc
Also, probly not inportant, I did replace the Trans mount as it was crap.
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Joined: July 17th, 2011, 7:07 pm

April 30th, 2012, 1:44 am #5


T.V. adjustment is not the problem.

If the manual valve is indexed properly with the internal linkage then the problem is likely a mis-assembled valve body (valve and/or spring installed backwards) or cross leaks at the VB/case/separator plate.

Did you install the gaskets properly? There is an upper and lower gasket, and if you swap them you can get those sysmptoms.
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Marc
Marc

April 30th, 2012, 2:30 am #6

Yes, I dropped the pan yet again today, and pulled the valve body. Went through everything,again,and found nothing wrong. Manual valve was definitly indexed properly. I didnt check the gasket, but all holes line up properly on the gaskets. At a loss. I did notice, the car is not even reving properly when in park. Its as if someone just locked the wheels. Does that make sense? Im about to throw in the towel, and start shopping around for a cheap tranny to get me by for now.
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Joined: November 18th, 2004, 4:20 am

April 30th, 2012, 10:17 am #7

OK, you have a seized clutch then.
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Joined: July 17th, 2011, 7:07 pm

April 30th, 2012, 12:35 pm #8


^^^ what he said ^^^

Probably the forward clutch is seized.
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Marc
Marc

April 30th, 2012, 5:28 pm #9

Also, probly not inportant, I did replace the Trans mount as it was crap.
Ok. That seems to be the general concesus.and makes perfet sence. Wish I had did more research before hand, but I learned a lot. I really do appreciate everyones input on this!
Marc
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