drhach Posted July 28, 2020 Share Posted July 28, 2020 Hello, I just acquired a 1965 BS code transmission. Supposedly this was used on the GS 425 with dual quads. I'm wondering if anyone can tell me if this differs in any meaningful way from any other 1965 transmission? What is unique that it is specifically coded to that car? Regards, Dan Link to comment Share on other sites More sharing options...
RivNut Posted July 28, 2020 Share Posted July 28, 2020 The valve body is programmed to give firmer shifts at higher engine rpm's when you really put your right foot into it. Nothing more than you can't do with an aftermarket shift kit. 1 Link to comment Share on other sites More sharing options...
drhach Posted July 28, 2020 Author Share Posted July 28, 2020 Thanks for the response. Link to comment Share on other sites More sharing options...
psychostang Posted July 28, 2020 Share Posted July 28, 2020 I believe that Tom said that it just allows the trans to shift at a higher rpm. Link to comment Share on other sites More sharing options...
drhach Posted July 31, 2020 Author Share Posted July 31, 2020 Yes, that's what I understood from his post. Now to get it rebuilt and installed. Link to comment Share on other sites More sharing options...
telriv Posted August 1, 2020 Share Posted August 1, 2020 What year car is this trans. going into??? Link to comment Share on other sites More sharing options...
drhach Posted August 5, 2020 Author Share Posted August 5, 2020 1962 Lesabre. Link to comment Share on other sites More sharing options...
RivNut Posted August 5, 2020 Share Posted August 5, 2020 (edited) Won't work. The 62 crankshaft has a flange designed to bolt to a Dynaflow flexplate. The 65 crankshaft has a flange designed to bolt to an ST400 flexplate. Dynaflow ST400 Edited August 5, 2020 by RivNut (see edit history) Link to comment Share on other sites More sharing options...
steelman Posted August 6, 2020 Share Posted August 6, 2020 Ed assumes you are using an original 62 Nailhead. So now we have to ask, what are you using for a motor. May work, may not. Link to comment Share on other sites More sharing options...
drhach Posted August 6, 2020 Author Share Posted August 6, 2020 (edited) I know this is the Riviera forum, so I appreciate the willingness to diverge a little. Yes it is a 1962 engine in a 1962 car. My understanding is that if I use a bushing on the crank, the later (64-66) flexplate and transmission will mount up. That is not the case? Centerville Auto Repair has one they claim will facilitate this. http://centervilleautorepair.com/transadaptors Regards, Dan Edited August 6, 2020 by drhach (see edit history) Link to comment Share on other sites More sharing options...
RivNut Posted August 6, 2020 Share Posted August 6, 2020 The part ADTR-1 says it is for the application you want to do. I think that there is a piece of the 63 crank that is a hub that is pressed into the back of the crank. That needs to be removed and the ADTR-1 part pressed in in its place. The ADTR-1 makes the diameter of the hub smaller to fit the 65 flex pate. I would think that a qualified machine shop would be able to enlarge the hole in the 65 flex plate to the size of the existing hub and you could bolt it on. Register on the V8Buick forum and post this question. Those guys aren't into whole cars as much as they are engines and transmissions. You are aware that your 63 starter will not work with a 65 flexplate. You'll need a starter with a shorter nose. One thing that I'm not sure of is "when did Buick switch from a torque tube to an open dive line." You'll want to confirm that before anything. Link to comment Share on other sites More sharing options...
johnrex Posted August 7, 2020 Share Posted August 7, 2020 I remember Buick eliminating the torque tube in 1959 Link to comment Share on other sites More sharing options...
drhach Posted August 7, 2020 Author Share Posted August 7, 2020 Thanks Rivnut. I'm registered on every Buick forum I can find :). I figured since it was from a GS Riv, I'd ask about the specifics of the transmission here. No torque tube in 1962 (I think 1960 was actually the last year for torque tubes). I got the guy to throw in the correct starter when I bought the trans. I've tried to do as much homework as I can. Link to comment Share on other sites More sharing options...
XframeFX Posted August 7, 2020 Share Posted August 7, 2020 So, I'm confused. I purchased Russ Martin's Hub Adapter and the Flexplate (pictured) a while back. I now see there are 2 versions of this flexplate. Do I need both, the hub adapter and Flexplate for my 1963 Dynaflow swap to 1965 ST400? Or, just Russ's flexplate with the large hole? John B. Link to comment Share on other sites More sharing options...
RivNut Posted August 7, 2020 Share Posted August 7, 2020 I think the part number BU10006 is what I was referring to as something a "qualified machine shop" could do to an OE 64-66 flexplate - enlarge the center hole to fit over the larger crank flange of the 59-63 401s (Dynaflow) crank. The starter ring on a Dynaflow is welded to the torque converter. You only need one or the other - the hub which you have or the custom flexplate. The flexplate eliminates the machine work of doing an r&r on the hub. Maybe more expensive but a lot easier. Have you thought about how you're going to hook up the kick down/ variable pitch? The Dynaflow kick down is activated via mechanical rod; the ST400 has two electrical wires that run to it - one for the kick down and one for the switch (variable) pitch. On the 63 - 66 Rivieras, with which I'm familiar, each of the years has a different carburetor with unique linkage that connects to the transmission (63) or the kick down switch (64 - 66.) The transmissions are different lengths which will require shortening your drive shaft and relocating the transmission crossmember. You'll need different shift linkage which may necessitate a different steering column and neutral safety switch. 1 Link to comment Share on other sites More sharing options...
drhach Posted August 11, 2020 Author Share Posted August 11, 2020 Ugh, so I got a quote of $900 for a rebuild plus "whatever the torque convertor guy may charge". So, I thought I would tackle the rebuild part myself. I ordered a rebuild kit from this place in Oregon. 8 days later, no change in the status of my order. They don't answer their phones or emails. Finally I sent a note threatening to have my bank draw back the money. The guy responds telling me some parts are on national back order and he didn't realize it. The saga continues. Link to comment Share on other sites More sharing options...
RivNut Posted August 12, 2020 Share Posted August 12, 2020 On 7/28/2020 at 5:40 PM, psychostang said: I believe that Tom said that it just allows the trans to shift at a higher rpm. The information that I posted earlier was from a post by Tom T. I'm not much of a mechanic but I have a great mind for remembering what I read. Here's his post copied and posted in which he says "higer rpm AND FIRMER" Just repeating what I'd read. I don't claim to be an expert on anything but what someone has said before me. The last four words that he posted. 😎 Here's the link to the entire thread. telriv 1k+ Senior Member Members 609 1,713 posts Location: ct. Report post Posted February 15, 2019 As you know '64's are by themselves. "65 & '66 the governor is set to shift at a slightly higher shift point & the separator plate the two holes that pass the fluid to the clutches to fill faster are slightly larger by about .020" for a firmer shift. Quote Quote selection Link to comment Share on other sites More sharing options...
drhach Posted August 13, 2020 Author Share Posted August 13, 2020 I can't wait to get my parts here so I can rebuild this thing. Link to comment Share on other sites More sharing options...
protrash63 Posted September 12, 2021 Share Posted September 12, 2021 Bringing this TTT.......any updates, how did it go, thread links? Link to comment Share on other sites More sharing options...
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