You got the Mustang and have $1800 left to buy an AOD, you must of had a really good divorce lawyer.

The converter needs to be matched to the engine and rear gear and intended use.  Cruise RPM and stall speed will determine whether or not a lockup converter is necessary. 

That is a good question.  With my T5, my cruise RPM is 2000 +-200 (depending on cruise speed).  What would the expected cruise RPM be for you with an AOD?

351W, 4R70W, 2400 stall converter, 9" 3.25 rear end  - cruise rpm at 60 is ~ 2000

6sally6 wrote:

Do they make a 2800+ stall converter that locks up ?! (just wondering!)
3.70:1 gear-in-the-rear might still sound pretty busy at 70+ MPH.......(butt then again... with a blower whining along you're not going for the 'quiet-cruiser' ride anyhow !)

I realize those rides with the 'Wuhhhh-Wuhhh-Wuhhh' blower surge go'in on is a sign of a combination that's not set up correctly BUTT............Man does it sound wicked cruis'in through the lot !!!
{Remember....Pitcherz....lotsa Pitcherz maybe a few videos when complete !}
6sal6

Sure, but they get expensive because a car needing a high stall speed is a monster typically so the lockup parts need to be a lot stronger.  That's why I asked, because a non lockup converter is cheaper.  If your cruise speed is above the stall speed there's no need to run a lockup, because the converter is going to basically be locked up anyway.  If you run a nonlockup and cruise at a lower RPM you create a lot of heat, and could kill the trans, because the converter is basically slipping all the time. 

Here's a high stall lockup converter for an AOD.

https://www.summitracing.com/parts/ape-26401/make/ford

Keep in mind stall speed is a relative thing, which is why talking to the company you buy from is a good idea.  Engine size, compression cam, rear gear, vehicle weight, etc. can all effect exactly where a converter stalls, so it may be listed as a 2,400 RPM stall, but that assumes a bunch of stuff.  In your car it might stall lower or higher based on how far from those assumptions you are. 
 

I reached out to Circle D and they recommend a non lock up 2800 stall converter. Do you guys know what is meant by a 9” converter or 12” converter? I’m pretty close to purchasing everything and want to be sure parts are right.

TKOPerformance wrote:

Brents65 wrote:

I reached out to Circle D and they recommend a non lock up 2800 stall converter. Do you guys know what is meant by a 9” converter or 12” converter? I’m pretty close to purchasing everything and want to be sure parts are right.

Yes, its literally the diameter of the converter.  My understanding is higher stall converters tend to be smaller because its easier to get a higher stall out of a smaller diameter converter.  Also, they are more race oriented, so moving the weight towards the center of the crank helps the engine rev more easily.  I wouldn't think a 2,800 stall would be a 9" converter.  Usually 9" converters are 3,000+ rpm stall. 
 

thank you.  I wound up buying a 9.5” non lock up converter and AOD. I just feel I will like it better for cruising with the extra gear. Thank you everyone for your input.