How do you guys using the Supercase like it? Were you breaking gears with the stock case and did the Supercase fix that?

I have broke "lots" of Muncie gears with a 'stock' 396 and was wondering if the Supercase was the answer.

thanks,
Joe

I would like to know the same thing.

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'69 RS/SS396 pro street
427/4spd/9"
Byars Performance
High Performance Drive Train Parts And Service
www.lubedealer.com/biggearhead (http://www.lubedealer.com/biggearhead)

Car Craft mag. did an article on this case in the latest issue that I just got in the mail today. pdq67

....And they said?????

Maybe he's still busy reading it. http://www.camaros.net/forum/smile.gif

Is he out of the bathroom yet? Inquiring minds wanna know (what the verdict on the case is)

Also got it. Car Craft got the case and the Italian-made gear set from Auto Gear. They also used Auto Gear's cast iron midplate. Almost all of the info in the article is straight from Auto Gear's website. Also mentioned Paul Cangialosi at Gearzone and said good things about his rebuild video.
A couple of interesting quotes:
"Muncie cases were intended for OEM power up to an "optimistic" 450hp." Car Craft planned to use this Supercase Muncie in their '65 LeMans project which makes "501 hp".
The Supercase has "beefier ears", "thicker front wall of case", "heavier-duty 307 front bearing", Case is a total of "0.1575 inches longer than stock".
Also, high casting quality with "low porosity".
Car Craft was, of course, very positive about the whole thing.
Rob

Can you gimme a link to their website??

http://www.autogear.net/hiperform.htm

I have the supercase, and the standard M22 close ratio gearset (they are making custom M22 ratios, including an in-case O.D., and wide ratio M22 also.) The case is MUCH beefier than an original. It uses a larger main bearing, and the other stuff about thicker ears is true. They all have a drain plug also. Definitely the way to go if you keep breaking worn out 30 year old parts.

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68 Coupe, 350 4-speed
Jim's Camaro Corner (http://www.personal.psu.edu/jxu109/)

I talked to the guys at auto gear a couple months ago, for the case, the gear set, iron mid plate and small parts its about $900. You still have to provide a doner muncie for miss. parts. Still cheapest way to go.

I could not them get them to give a ball park figure of what kind of ft lbs it would hold, they just said it varies on gear ratio and car weight. I have heard a stock muncie hold up to around 450 fts.

I have run 10s with my factory M-20 ( very light car) but it scares me. I know it will blow some day. I think this is the route Im going to take.

[This message has been edited by roger69 (edited 04-04-2002).]

Why can't the stock gears be used? I understand the need for a stronger case, I've seen them break. Are they also saying the gears themselves won't hold up, even with a stronger case?

The stock gears can be used, but sometimes it's hard to tell if they are ready to break or not (small chips, hairline cracks, etc.), so I got new gears too, just to have one that's all new (with the exception of the tailshaft.)

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68 Coupe, 350 4-speed
Jim's Camaro Corner (http://www.personal.psu.edu/jxu109/)

There was another builder/supplier of aftermarket Muncie cases. Anyone recall who it was?

Doug Nash did a case and gears a few years back. You can see some pictures at www.5speeds.com (http://www.5speeds.com)
Look at the muncie section rare parts

[This message has been edited by secndgn (edited 04-04-2002).]

I talked to a guy at Autogear today and he said that my M20 gears in the new case would be enough to handle my 427 without breaking. The case is $300.

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'69 RS/SS396 pro street
427/4spd/9"
Byars Performance
High Performance Drive Train Parts And Service
www.lubedealer.com/biggearhead (http://www.lubedealer.com/biggearhead)

That's good to know. Thanks.

Big Gear Head, have you been breaking "stock" Muncies?

I wasted 8 in about a year -- had to install a TH400, this was 20 years ago. Now I am 'restifying' my Camaro and am going with a Muncie and just exploring some options.

I have heard almost every possible cause for my breakage but the most reasonable seems to be BB torque and 3.08 gears so I have installed 3.73's in an attempt to take some load off the tranny but this supercase sounds promising. Wish someone using the case could confirm if it "fixes" this problem.



[This message has been edited by Turbo_Jet (edited 04-06-2002).]

Sorry I didn't get back with more info, I hadn't read the article yet, that's all.

Yes, I wasn't in the mood ta hang out on the "Throne" yet!!! He, He!!

BTW, I contacted the company that handles the A833 MOPAR four speed transmission now and asked about its torque rating. They got back and said like about 275 pound foot or so! I e-mailed back and said that I didn't understand how it held up behind the infamous Hemi!

Never got a come back.

I have an excellent low mileage A833, 1970 Challenger, trans. and thought about swapping it for an A833 O.D. unit to put behind my big engine, that's all. pdq67

PDQ, i suspect they tell you numbers like that, so if you have 276ft lbs of torque, and you tach it up to 5500rpms and let er' rip with a set of slicks and bust the trans into peices they can say "its rated for 275" and not worry about it.

I have only broken 1 Muncie, and it was in a customer's car. It was a rebuild and I think the case was already stretched because it broke way too easy. I have been taking it easy on the one in my Camaro because I don't want to break it. I may give this new case a try some time this summer.

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'69 RS/SS396 pro street
427/4spd/9"
Byars Performance
High Performance Drive Train Parts And Service
www.lubedealer.com/biggearhead (http://www.lubedealer.com/biggearhead)