AOD 3-4 Accumulator?????
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AOD 3-4 Accumulator?????
I'm replacing my AOD tranny. I popped the pan and noticed the 3-4 Accumulator is missing. Is this part needed. I have a ATSP manuel and it says
"Install the piston (and spring, if so equipped)."
I'm not sure if that means some were equiped without the accumulator or just without the spring. I have an accumulator from the old tranny and installing it would be easy I'm just not sure if I should. My hunch is this is a Mustang tranny and mine is from a truck (installing in a truck). Maybe this is a truck only part?
Thanks for any advice.
Dan
"Install the piston (and spring, if so equipped)."
I'm not sure if that means some were equiped without the accumulator or just without the spring. I have an accumulator from the old tranny and installing it would be easy I'm just not sure if I should. My hunch is this is a Mustang tranny and mine is from a truck (installing in a truck). Maybe this is a truck only part?
Thanks for any advice.
Dan
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Googled it and found this, whew the install continues!
In 1989 the 3-4 accumulator was eliminated, and the holes in the valve body that feed it were blocked. If your transmission doesn't have the 3-4 accumulator make sure you use a valve body that is a 1989 or later style or you will have an internal line pressure leak. 1989 and later valve bodies can be used in earlier transmissions with the 3-4 accumulator, but an earlier valve body cannot be used in a case without the 3-4 accumulator. You can add a 3-4 accumulator to a later model case and use an earlier valve body if you have to, but the later valve bodies are recommended. Not having the 3-4 accumulator does not result in a firmer 3-4 shift, the softening of the 3-4 shift is just accomplished differently in the 1989 and later transmissions.
In 1989 the 3-4 accumulator was eliminated, and the holes in the valve body that feed it were blocked. If your transmission doesn't have the 3-4 accumulator make sure you use a valve body that is a 1989 or later style or you will have an internal line pressure leak. 1989 and later valve bodies can be used in earlier transmissions with the 3-4 accumulator, but an earlier valve body cannot be used in a case without the 3-4 accumulator. You can add a 3-4 accumulator to a later model case and use an earlier valve body if you have to, but the later valve bodies are recommended. Not having the 3-4 accumulator does not result in a firmer 3-4 shift, the softening of the 3-4 shift is just accomplished differently in the 1989 and later transmissions.
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