Re: Packard Engine to GM Auto Transmission Adapters
Posted by HH56 On 2023/11/5 22:11:54
I don't know what mounting holes are available on the GM trans and don't remember any being installed in place of a 23rd series Ultramatic. If you go that route believe you will be blazing the trail. What I was asking about is the stock 23rd series Ultra install on a smaller engine that only has a single front mount..
The 356 engine did have some small side stabilizer brackets located a few inches rearward of the front mount. Those also bolted into the front cross member but to the best of my knowledge the holes for those brackets were not on the smaller 22-23 series 288/327 blocks. The only decent sized side holes on that block would be where the manual shift idler assy bolted to the block and I believe those would be unused if there was an Ultramatic. Nothing is on the passenger side.
Likewise, there are 4 unused holes on the drivers side of the Ultramatic but again, nothing on the passenger side. I don't believe either of those sets of holes are anywhere close to any kind of ordinary frame mounting point.
Question is did they somehow use those holes and only stabilize one side with a special bracket or did the 23rd Ultra engine half of the bellhousing have some kind of stabilizer arrangement? If not, how is the engine stabilized? The single rear 23rd Ultra mount might be a tad wider than the later units but not by much.
Attach file:
288:327.jpg (305.61 KB)
23 Ultra.jpg (169.76 KB)
The 356 engine did have some small side stabilizer brackets located a few inches rearward of the front mount. Those also bolted into the front cross member but to the best of my knowledge the holes for those brackets were not on the smaller 22-23 series 288/327 blocks. The only decent sized side holes on that block would be where the manual shift idler assy bolted to the block and I believe those would be unused if there was an Ultramatic. Nothing is on the passenger side.
Likewise, there are 4 unused holes on the drivers side of the Ultramatic but again, nothing on the passenger side. I don't believe either of those sets of holes are anywhere close to any kind of ordinary frame mounting point.
Question is did they somehow use those holes and only stabilize one side with a special bracket or did the 23rd Ultra engine half of the bellhousing have some kind of stabilizer arrangement? If not, how is the engine stabilized? The single rear 23rd Ultra mount might be a tad wider than the later units but not by much.
Attach file:
288:327.jpg (305.61 KB)
23 Ultra.jpg (169.76 KB)
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