Had a Powerglide built for our BB Mopar. BTE case, Reid Bell (for BB Mopar) and JW spacer and fexplate. The car has a .090 midplate.

Had a converter built bu TSI. Had them build it for the .090 midplate.

Installed the trans and converter last night and I have literally zero clearance to move the converter in and out. We like to set them up for 1/8" in and out but at best I have .010

Has anyone else ran into something similar? It seems that if I had them build the converter for no midplate it would have fit pretty much perfect?

We confirmed the converter was installed into the trans all the way engaging the pump gears and that the snout fit the JW spacer as it should and it spins freely. Just not the in and out we needed????

I have had this kind of issue with converter fit in a mopar many many times. Not sure why, but bottom line is the guy who built the converter just did not use the right height when jigging op the converter before welding. At least you guys know to check it, I have fixed several who did not, and destroyed the pump, pushing metal all through the trans.

I am thinking our option is to send the converter back to TSI and have them make it standard? Not for the .090 mid plate. Also have them double check there dimensions to confirm it was indeed originally built for the .090 midplate.

If we gain the .090 clearance back we should be very close to our desired clearance.

The JW spacer you mention...is that the converter hub adapter for a GM converter to Mopar crank? The Meziere goes on the trans side of the flexpate so it doesn't space the flexplate out. How does the starter situation look?

On ours we machined the spacer down for additional clearance,also we adjusted the starter depth with shims on starter.

Good luck

The JW spacer goes between the Mopar crank and the JW flexplate and spaces the flexplate out toward the trans. We had to make a 3/16 spacer for the starter or it would be engaged all the time.

I have the JW wheel, adap, bell on a T400. Same situation , I had the pads on the converter knocked down .100. Also took .100 of the part of the spacer that sticks thru the flywheel. After machining it was flush with the flywheel so it still registered it.

We thought about that option also. We would just have to make additional spacers for the starter since this would move the flexplate closer.

That is another option we are looking at. That would give us the clearance we need

I had the same issue when I put a 2004 in my '68 A-Body. I sent the converter back and they altered the thickness of the converter to gain the clearance I needed. I didn't use a crank spacer or mid-plate.

The Reid bellhousing install is much cleaner and easier to work around than using an adapter plate.

Gotcha, sucks we cant do this swap easily...

1/4 aluminum midplate?

Just spoke with Eric at JW. He said that I need to measure with a straight edge layed across the front of the bell and the converter all the way installed in the trans. He said the measurement should be 1" if the converter is set up correctly for the .090 midplate. I will have yo check it tonight after work.

Eric at JW has been extremely helpful through this process. Answers emails and calls immediately! I have nothing but good things to say about him at this point.

When you source parts from different manufacturers, this happens. It's not a screw up by anyone, just typical non-Chevy race car headaches. I always specified a standard dimension converter and did what I had to do with the small parts to make it work. Helps avoid any future issues with converters.

I worked at a shop that was mainly Chevy. Once you get past OEM style parts, Chevys didn't bolt together either. Also, it seemed like the more the part cost, the more work it needed to fit.

Like others said machine the crank adapter on the back side.

I've put chevy transmissions on factory cranks, bryant, callies, and winberg. They all stack up different. Callies i have to take off .05 Bryant/winberg, .1 and nothing off factory. You can see the different flange thicknesses from one maker to the other.