Have Transmission Questions? Ask a Mechanic for Answers ASAP
The A 518 transmission was used for many years. The number on the top of the bell tells you what engine the trans bolts to. Now here is the catch. Even if the two cases have the same number on the top, you still have to watch for the starter mounting. You can use a case as far back as 1992 as long as the numbers match, and the starter mounts the same. The starter mount can be on the other side of the case, or even smaller so make sure not to get the wrong one.
Yes it is an A 518, unless it has the larger input shaft, then it is an A 618. The only difference is the input shaft size, a well as the pump stater. Both use the same internal parts so you can swap out your internals into the new case.
The chances of it being a A618 is slim. I have only seen one in all the years I have been building.
Can you send me pics of the transmission as you take it apart? This will be the best way for me to tell if you have internal part damage? What all have you removed form the transmission to this point?
So you have not removed the over drive section yet?
Then how do you know that the intermediate shaft wabbles?
That is the input shaft, and it should move some.
Have you ordered any parts for this rebuild yet?
Where are you planing on getting your parts from?
The intermediate shaft runs out the back of the main unit and into the od section.
Let me save you some money. You need to get all your parts from trans star. Once you have the unit torn down, if you can send me some pics I can see what all you need to order to make it work again.
Now for the hard part. Do you have a clutch drum press, as well as a big press? There are some other special tools that you will have to have to do this job. The over drive section is not something you want to just try to take apart with out the correct tools. There is a spring in it that can KILL you.
If you can, get all the tools together and post a pic of them so I can make sure you have everything you will need.
Now the first thing you need to do is unbolt the od section next and remove it. This will make the trans easier to handle and get apart. Then unbolt the pump and remove it. Then all the rest of the internals will slide out once you have removed the bands.
Did anything fall out?
On the back of the transmission there is an aluminum piece. There is an apply piston that you need to remove from the center of it.