I'm hoping to find someone in the process of using Hot Heads Hemi to Chevy Manual adapter. The input shaft is bottoming out into the pilot bearing before the ****** is fully mated. This is a 392, TKX and a Chevy II bell. This is my second build with this adapter. The last one was fine. All the same parts except that was a TKO. The input shafts are the same. I also verified the length of the input shaft compared to a Muncie. My bell is about 6 5/16" deep. I have an Ansen blowproof that I had planned to use. It's even shallower (6.25"). Measuring everything it appears the bell needs to be 6.5" or more. I spoke with Eric (HH) he said the bell needs to be 6.5" deep. The deepest (standard) bellhousing I can find is 6.45" I'm thinking that Hot Heads machining on the flywheel is off. There's a couple measurements I would like to get from someone who is not having this issue. Thanks. Phil @philshevlin
I would take a grinder and a cutting wheel to the end of the input shaft. We talk'in less than 1/2" right ?! That Muncie will never know the difference....YRMV 6sally6
If I read it right you need to add another .05 or more? Can't you just trace the pattern to some metal and make a spacer? Or am I just plain wrong on that.
I agree with 6sally6. I would mock up the whole deal with the flywheel and clutch ***embly to make sure everything else fits properly before making any modifications.
Don't know if it helps but skimming through a mustang forum they talk about the tkx and bearing vs bushing. Don't know what you're using. https://www.vintage-mustang.com/thr...e-bronze-bushing-or-a-roller-bushing.1211023/
I'm thinking that if you did some checking that adapter is for a Muncie or Saginaw and not that fine spline aluminum case ? speed. I'm thinking that this spacer and the instructions are the fix eBay item number:321168494932
Are you using a bearing or bushing? In the picture it looks like it's the splines that are hitting. In my hemi with a muncie 4 speed I used a bushing and it fits in the crank, instead of the flywheel.
Part of the problem may be the machined hole in the end of the crankshaft. I know some the Mopar V8s that came with auto transmissions did not have the machined hole in the end of the crank machined deep enough for a manual trans. Back when we were racing them, we had the input shaft on one of my 4 speeds cut off so it would work, but back then parts were easy to find. These days, I would go with the spacer and longer bolt package.
Thanks for all the suggestions. I was hoping to get the measurements to see what is going wrong before I modify anything. Its a very popular setup that i have used more than once. I hadn’t had this issue or heard of others having it. I’ll be using a spacer if I have to. To use the ansen blowproof housing the spacer will be closer to .3” Now that Im reaching out, I am hearing that others have had similar issues.
A spacer sounds better than modifying expensive parts. I used a piece of 1/4" aluminum to get mine to fit. Slightly different set up. Desoto hemi-Chevy Lakewood ****tershield- 1/4" spacer-dodge A833 4 speed
Hi Phil, The TKX is the issue or more specifically the bell housing. The TKX shaft-mounting surface dimension is 6.71 inch for GM applications. The Muncie/Saginaw is 6.3 inch. Seems like the suggestions for spacer or cutting the shaft are the best/simplest solutions. I have a 1953 331 Chrysler Saginaw 4 speed set up with the HHH adapter no issues. Don't over think it, it's just a car. Joe
Just trying to figure why. I have another 392 with a TKO (6.71) and same bell housing no issues. I prefer to think things out. Thanks. and I have a Muncie that measures 6.625”
The pilot adapter could be the problem. The original Hemi flywheel had a recess in the crank end. The adapter flywheels have a flat mounting face. the register is in the crank adapter.
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