The Stovebolt Site Forums The Shop Area The HiPo Shop Automatic transmission mounting question.................

Just wanted to throw this out there and get some feedback. My truck is a 47 1/2 ton AD. I'm going to use a 265 V8 (lot of family history with this setup) in this truck and was going to use a 5 speed manual trans. I have been also considering using an automatic trans (200R4). Since the 265 uses 2 front engine mounts (no side mounts) the transmission will need to be supported off of the back of the engine. What I'm thinking might work is using something similar to this:

https://www.danchuk.com/ItemForm.as...ory=49479621-6589-48ec-87b5-ceabc840a895


I know that these mount are for a 55 - 57 car, but am using them as an example only.

The rear motor mount crossmember would need to have a section cut out for the transmission to fit and the remaining crossmember pieces attached to the left side of the frame and right side of the frame would need to be configured for these trans mounts to work. The tail shaft of the transmission will also be supported.

I'm staying with a solid front axle that will be dropped 2 inches so no frame mods will happen there and I was just thinking of any flexing of the frame that might cause any damage to the drive train. It won't be a work truck but will be my daily driver.

Dan

I think you are on the right track. There is too much distance between the front mounts on an early engine and the rear trans mount to support both properly. It is a common mistake that people make when converting to an auto trans. I have seen examples where the only thing that was holding everything in place was a rigid exhaust system. I have used the Danchuk bellhousing mounts which were designed for that specific purpose. The Danchuk mounts are a little pricy and you would have to modify them anyway so I would suggest you fabricate some bellhousing to frame mounts to suit your application. It would probably be a good idea to use a rubber mount pad on each side of the frame so there is some flexibility.
Fred

Thank you for the reply. The shop that will be doing the install can easily make the brackets and will definitely use rubber pads with the mounts. I would think that the remainder of the rear motor mount crossmember pieces the trans brackets would mount to will either need to be reinforced or new ones made.

Dan