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In repairing a race car, I have the drivetrain out and am wanting a better Transmission Mount for the G044. I haven't seen any solid transmission mounts on the market for the 968. Lindsey and others have 944 solid and semi-solid mounts, but not 968. The mount I have looks original and worn.
Anyone know of a supplier?
Or does anyone have a design for making one. That's the route I'll likely take is to design and fabricate a solid mount. If someone has a design, or even thoughts on a design, I would love to start from something existing..
The 944 mount to me looks like a totally different fit. I'm not sure if y'all can tell from this photo, but the two bolts that attach to the tranny are not parallel to the plate of the four bolts that connect to the car. It's just a very different angle.
I order the RS Barn Mount and haven't heard back. I think I spoke with Pete at RS Barn last summer about this and for some reason couldn't supply it then. Having not heard anything today, I'm hoping it's just in the mail.
Thank you all for your help.
There's a few threads around on modifying the 944 transmission mount with a liquid urethane.
Looks like the 968 trans mount would be a candidate for that though the form work looks more challenging.
I completed this project last winter. Has held up well, improved feel at the rear and in shifting. Worth checking out.
The solid mount looks better for a dedicated track car...good find Yogii.
Hi Erik,
When you say you filled it with 3M Window Weld, did you just inject the Window Weld into the cavities of the existing rubber? Or did you make a mold and replace the existing rubber. The write-ups that I've seen for the 944 mount replace the rubber with urethane by making a mold, but it sounds as though maybe you didn't go about it that way. Do you have pictures of what you did?
I'm honestly challenged to even take the mount apart. It's clearly at least 4 pieces. I can get the bolt out and the housing the surrounds the rubber is loose, but I can get the pieces actually apart because the hanger doesn't come out of the rubber. I feel like I'm missing something (not a part, but an idea) when I try to disassemble.
When modifying the 944 mount we're typically just adding urethane to and around the existing rubber mount, not trying to replicate it.
The taping up of a form work as the first step is to contain the urethane and keep it from leaking out and creating a mess.
No pictures, it was a few ago. I just filled every gap and opening of the stock mount so that the 'arm' would move as little as possible. The window weld hardens into a stiff rubber. I was tearing cv boots in long races, but that stopped after filling the trans mount.
Thank Eric K for the idea of using 3m Window Weld Urethane as a filler in the rubber portion of the Transmission mount. For anyone looking to try this, here's a little step by step:
You could do this while the mount and transmission are the car I suppose, but you'd have to deal with a pretty tight area and the product definitely sticks to everything so be careful. I had the transmission and mount already out of the car.
I bought #m Window Weld at Autozone for $30. It's a bit cheaper online, but I don't want to wait for it. Window Weld is a Polyurethane Black Thick paste with a Shore A Hardness of 55-60 rating. It will cure within 12 hours or so, depending on temperature. It's designed to glue glass windshields into cars.
I cleaned out the cavity of the rubber with compressed air. Here you can see the gap in the rubber. The big block has an insert for the hanger and the insert is attached to the top of the block, but nothing supports the hanger from below. these pictures are before injecting the #M Window Weld:
To use the product, you need a caulking gun. Wear rubber gloves - this stuff will get on everything. I worked on a steel pan and laid down a few paper shopping bags as I was doing this in the kitchen instead of outside in the colder garage.
I simply set up the caulk gun and injected the urethane into the cavity. I then injected some between the block and the metal brace and just filled in as much as I could. Now it looks like this and is drying overnight.
There are pros and cons of a solid transmission mount and what I like about this solution is that the mount isn't totally solid, just firmer. An actual solid mount is not gentle on the rest of the car and sends lots of vibrations into the body that both generate noise and crack things. I don't think to fill the rubber with urethane is going to make it so stiff that parts of the car will break, but I do hope that it tightens up the shifter feel a little and help stabilize things in the back of the car.
Last edited by Isaacsracing; 01-05-2019 at 10:14 PM.
12-26-2018, 08:05 PM
Solid Transmission Mount
