Nemesis_Dawn

So long story short, I finally finished assembling the transmission after a lot of pain and bruises, and when I finally sit the pan down, it rocks from side to side and doesn't want to sit flat! I kept checking if there was something in the way but there's none. And I don't see obvious dents in the pan itself. I tried removing the filter to see if it'll sit flat, and it did. I can force the pan down and tight it, but even I know that it'll end up leaking in the future.

I can't figure out what the problem might be, so I took a bunch of pictures to see if anyone here can notice something I've probably missed.

Here's the pan's gap, it's rocking from the opposite corner.



Outside and inside of the pan (no magnet, I know. The previous owner seems to have disliked the magnet and liked ***** instead, as I've extracted 10 or so steel ***** from the transmission!)

Aerial and side view of the filter, it's pushed all the way in

Tried taking pics of gaps between the filter and the valve body. Could be useful, could be not.




What it looks like and underneath the filter and the filter seal

Hope someone can have an idea for what's going on

bp m1009

iTrader: (2)

I had this happen on a 4l80 I did, it was because the new chepo pan gaskets are too thin compared to the factory reusable ones.

Nemesis_Dawn

But the pan gasket I have is a genuine ACDelco one, and the filter too.

bp m1009

iTrader: (2)

I'm not positive but usually they sell 2 different ones. The cheap fiber one that you have and the thick plastic w/ rubber impregnated seal one. What style was the one you took off?

urb0123

I'm not an expert at all, but.

Looking at the second and third picture, it looks like that pan has hit the road at least once in it's life, and yet it sits flat without the gasket.

If it sits flat without the gasket, and nothing is blocking the pan, I would have to say it's the gasket.

In your shoes, I would just tighten it up and go with it. I like to to pull the pan in a month or so after a rebuild anyway to clean out all the bits from new bushings, clutches, bearings and hard parts breaking in.

Speaking of all the bits, I would make sure it has a magnet in it to catch them.

Nemesis_Dawn

Are you referring to the gasket or the filter? But nevertheless, the old filter looks identical to this one, but the gasket is a bit different (the old one is more like rubber).

But I'm pretty sure that the problem isn't with the gasket. It's either that the filter isn't correct (which I'm pretty sure it is), or that the pan is dented somewhere.

98CayenneT/A

It is not the gasket and do not just tighten it down and run it.

Make sure the neck of the filter is fully seated, sometimes they can really be tough to get the last 1/4 in. to seat. What filter ( part number ) did you buy ?

clinebarger

It's the pan.....I doesn't take much at all, I have to straighten them out all the time with my Arbor Press.

A new GM pan is $13, is a '05-'09 pan.....You will have to remove the Dip Stick Stop....The stop is built in this pan.

mrvedit

All those pretty new parts - harness, pressure switch, etc. deserve a new pan.

Nemesis_Dawn

I pretty much put all of my strength on the filter, so I'm pretty sure it's all the way down. Part #24208576. I think it's the pan as the others suggested.

Nemesis_Dawn

Exactly. Besides, everything you see there (except the accumulator housing) is either new or salvaged. Old VB was severely damaged in the reverse abuse bore. Will make a thread showing the parts and a video of the transmission's performance later.

Nemesis_Dawn

I don't have a press like that around here, so I guess I'll have to get a new pan. I have a local shop nearby that'll sell me one for dirt cheap. I'll reply here with the results.

sjsingle1

iTrader: (1)

i just used a hammer and a block of wood on my ebay truck pan.....worked like a charm !!

and you have the nice pan with a drain plug.....

PBA

As Clinebarger says, it's the pan and it should be easy to make flat again. I have seen this a lot over the years.

bp m1009

iTrader: (2)

I still don't think its the pan, but we will see. Interested in the findings!

Nemesis_Dawn

So as many of you have suspected, turns out the pan was slightly dented from underneath I tried hitting it lightly to even it out, but it would still rock slightly. I went ahead and bought a new pan with a magnet anyway. I also bought a new manual lever position sensor, and 12 quarts of ACDelco ATF.

Transmission will be installed tomorrow, and I'll make a thread on the parts I've used from Dana, and make a video of how the transmission was before biting the dust, when it bit the dust, and after the rebuild.

PBA

If we have not already talked about it, call me on how to break it in.