transmisson boss brace

rktmn

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MSN recently dropped their GROUPS website, so I lost all my "online" photographs of my SHO mods.

I will post some of the SHO products I make, along with installation instructions etc. in the Forum. This way anyone can always refer to them.

I plan to keep some of these products in stock, something that I have not done in the past, so if anybody is interested please let me know.

I designed the tranmission boss brace after hearing about several of them breaking off, and how difficult it is to repair them. Sometimes even having to repplace the transmission case.

Here is a photo of the tranny boss:
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I installed one of the brace mounting bolts in the transmission case.

Here is a photo of the brace installed using the 2 convenient mounting holes in the transmission. The brace is made of 1"X1.800"X5" aluminum bar and it sits at the same height as the boss.
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This is an earlier version of the brace. I now use 4 machine screws to hold on the stabilizer plate.

Here is the boss brace with the stabilizer plate installed. The new plate is
1/4" thick. The one in the photo is 1/8 thick".
The plate actually presses down on top of the boss, so in order for the boss to break off, it would have to lift the plate and push the brace out of the way. It would take a great deal of force to do that.
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You can see that the stabilizer plate is also held down by one of the mounting bolts.

Here is the shifter rod bolted to the transmision boss. The 12mm shifter rod mounting bolt goes through the 1/4"stabilizer plate and threads into the transmission boss.
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In order for the boss to shear off, it would have to take out the stabilizer plate, the aluminum boss brace body and the two 7/16" bolts holding the brace to the transmission case.

The 2 brace mounting bolts along with the 12mm shifter rod bolted to the boss, sets up a very strong triangulation holding the boss in place.

Anyway that is the theory behind the transmission boss brace I manufacture.

In case that you have already sheared off the transmission boss. I recently made a 3/8th in stabilizer plate, which is threaded, so you can actually bolt the shifter rod directly to the tranny boss brace. I do not know how strong or durable this setup is, but the threaded stabilizer place will actually replacing the missing boss. Time will tell how well this repair will hold up.

Jose
 

VortecGT

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is there a way to repair the boss brace with one of these? i have a broken one but dont know how to fix it.
 

Kens1992mtxSHO

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Awesome. Thanks for posting this here Jose. I was kind of sad when MSN took away the groups.
 

rktmn

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VortecGT, I can make a custom, thicker, threaded stabilizer plate for the brace to allow the shifter rod to bolt up to it. Since the plate is thicker, it will only fit if the boss is broken off.

This setup will replace the boss and will offer a plataform to bolt the shifter rod.

The 2 bolts that mount the brace to the transmission offer a very strong method of attatchment and should be able to replace the the broken boss.

I will post a photograph of one later today.

Jose
 

rktmn

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I finally made the repair stabilizer plate for those who have broken off the boss on their transmission. This threaded plate will actually replace the missing boss.

This 3/8" thick plate is threaded to allow the 12X1.75mm shifter rod bolt to ***** into it.
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Here you can see the difference between the brace with the 1/4" stabilizer plate to protect the tanny boss the and the 3/8" threaded stabilizer plate.
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This is a top view of the boss brace with the 1/4" stabilizer plate.
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In order to use the 3/8" threaded stabilizer plate, the broken boss must completely removed from the transmission. Otherwise the thicker plate will not fit.

If you have stripped the threads inside the boss, I could make a threaded 1/4" plate that should be thick enough to hold the 12mm bolt inside the boss and give it enough bite to keep the shifter rod in place

Remember this is a repair. I have sold a couple of these, and they seem to work well.

Any questions??? suggestion???
 

VortecGT

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yea the brace is broken off. you will make a brace for me?! that would be awsome!!!!
 

rktmn

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The price of the tranny boss brace is $125.00 plus $15.00 shipping

The boss brace with the 3/8" threaded plate is $165.00 plus $15.00 shippong. This plate takes a bit hand labor to do.

Jose
 

SHObill

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-So to add the 'brace' to a GOOD case I would have to cut 1/4" off the rod shifter mount to get it back to stock location, correct?
-Do the two tranny 'brace' mounting holes have to be drilled out to accept the new longer bolts?
-If so can this all be installed with the tranny in the car?
-Do all the fasteners come with the 'brace kit?
 

rktmn

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No. I make 2 different stabilizer plates for the brace. One is 1/4" thick, and that one will drop right over a healthy boss with the brace. It is a straight forward installation. You do not need to drill anything. It is designed to protect the boss from breaking off.

The 3/8" thick stabilizer plate is threaded to offer a transmission with a missing broken boss, a place to attach the shifter rod. The 3/8" plarte will not fit if the boss is there.

If you look at all the photographs I posted, you can see that the kit is complete. It is very easy to install and can be done in less that 1/2" hour. You will need to get under the car. It is easier to assemble the brace loosely to install it, and then tighten all the bolts.

Jose
 

tompumped

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Is this fairly common for them to break from banging gears or does it brake if you have other problems such as bad motor mounts? I never heard of it happening, but I don't know.
 

93rev2sev

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It breaks when motor mounts fail while yer slammin gears.

Or if an Explorer lands on your hood. ;)
 

tompumped

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lol, i'm surprised I didn't break the one in my first sho. My mount was shot.
How did an explorer manage to land on your hood? That doesn't sound too good.
 

MONSOUN MOTORS

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No. I make 2 different stabilizer plates for the brace. One is 1/4" thick, and that one will drop right over a healthy boss with the brace. It is a straight forward installation. You do not need to drill anything. It is designed to protect the boss from breaking off.

The 3/8" thick stabilizer plate is threaded to offer a transmission with a missing broken boss, a place to attach the shifter rod. The 3/8" plarte will not fit if the boss is there.

If you look at all the photographs I posted, you can see that the kit is complete. It is very easy to install and can be done in less that 1/2" hour. You will need to get under the car. It is easier to assemble the brace loosely to install it, and then tighten all the bolts.

Jose


I have the 3/8" thick stabilizer one installed on my SHO and all I can say is WOW!! I mean combined with Jose's SHOrt shifter it is just a winning combination especially if you drive and shift hard, ocassionally. Thanks again Jose.
 

AREA 91

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When are these available for purchase?
What's your pay pal address?
:angelnot:
 

93rev2sev

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lol, i'm surprised I didn't break the one in my first sho. My mount was shot.
How did an explorer manage to land on your hood? That doesn't sound too good.

It was hit in the right rear. She was turning left in front of me, coming from the right. It popped up 2 feet, swung around and landed on my hood with the left of the rear bumper. It basically crushed the hood and smashed the core support and headlight/panel on the left of the car. The engine was tossed "up", causing rod shifter to ****, perhaps getting pried by the exhaust? I was stopped at the red light they both blew.
 
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