Ordered a trans mount through a vendor over the winter and went to install it yesterday...too narrow to mount on the bolt holes of the trans. I chalked it up to a snafu from the vendor and bought one from O’reilly today...same exact mount. Is there something I’m missing?
Looking at some other photos of mounts on vendor websites, these appear to be 350 mounts. The 400's look like they have elongated holes. Awesome.
If I look up the mount for a 1970 GS455 on Rockauto, I get Pioneer 622378. https://www.rockauto.com/en/moreinfo.php?pk=5404596&cc=1379763&jsn=423&jsn=423&jsn=423 If I look up the mount for a 1970 GS350, I get pioneer 622394 https://www.rockauto.com/en/moreinfo.php?pk=6617288&cc=1379684&jsn=486 That mount has a single stud though.
If I look up the mount for a 1970 GS455 on Rockauto, I get Pioneer 622378. https://www.rockauto.com/en/moreinfo.php?pk=5404596&cc=1379763&jsn=423&jsn=423&jsn=423 If I look up the mount for a 1970 GS350, I get pioneer 622394 https://www.rockauto.com/en/moreinfo.php?pk=6617288&cc=1379684&jsn=486 That mount has a single stud though.
That's the first place I went...and noticed the stud on the 350 mount. But when I go on Todd's site, here is what I am seeing: https://www.stage1restoration.com/product/transmission-mount-th400/ and here is the 350 mount... https://www.stage1restoration.com/product/transmission-mount-th-350-muncie-4-speed-powerglide/ The ones that I have here look like the 350 mounts.
and the photo for the 400 on Todd's site shows the rubber embossed with 2268, not 2368 (the ones I have here are 2368)
Auto Zone lists a 2268 but says it doesn't fit the GS455 https://www.autozone.com/drivetrain/transmission-mount/duralast-transmission-mount-2268/155267_0_0
Just went through this last winter. I bought mine at O'Reilly's, part number A2268. I can't remember if I finally got the part number for a big Buick or a Chevelle. Like you, the first mount I got from them was for a TH350.
This is the Anchor 2268, https://www.rockauto.com/en/moreinfo.php?pk=314933&jsn=260 2.66 at rock auto https://www.rockauto.com/en/parts/anchor,2268,transmission+mount,8616
Adam, I'm pretty sure I have an NOS one if you get jammed up. I can't do it any cheaper than $2.66, though.
I believe I have 2 spares for TH350 around here because the first 2 times I ordered them, they sent the wrong things. Glad you got it squared away.
They do not seem to know what trans is in your car. That happens all the time here, since the trans is every car has been upgraded. I usually resort to looking up a model for which the TH400 (or whatever) was the only option. Bruce Roe
O" Reilly's kept sending us TH350 Mounts even though we specified TH400. Happened about 3 times last year. Simply another reason why I started stocking all this stuff! Then when I get a wrong part I can just blame myself! Lol Thanks Adam for checking with me. Happy to help!!! Both versions in stock for $15 ! (and I know what one to send ya) Want a whole kit with correct GM Hardware ??? I have them to!
