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It may not display this or other websites correctly.<br />You should upgrade or use an <a href="https://www.google.com/chrome/" target="_blank" rel="noopener">alternative browser</a>.</div> <div class="p-body-header"> <div class="p-title "> <h1 class="p-title-value">1965 Skylark Gran Sport ST300 transmission</h1> </div> <div class="p-description"> <ul class="listInline listInline--bullet"> <li> <i class="fa--xf far fa-user" aria-hidden="true" title="Thread starter"></i> <span class="u-srOnly">Thread starter</span> <a href="/community/index.php?members/mike-maher.21119/" class="username u-concealed" dir="auto" data-user-id="21119" data-xf-init="member-tooltip">Mike Maher</a> </li> <li> <i class="fa--xf far fa-clock" aria-hidden="true" title="Start date"></i> <span class="u-srOnly">Start date</span> <a href="/community/index.php?threads/1965-skylark-gran-sport-st300-transmission.29409/" class="u-concealed"><time class="u-dt" dir="auto" datetime="2021-07-05T17:43:44-0600" data-time="1625528624" data-date-string="Jul 5, 2021" data-time-string="5:43 PM" title="Jul 5, 2021 at 5:43 PM">Jul 5, 2021</time></a> </li> </ul></div> </div> <div class="p-body-main "> <div class="p-body-contentCol"></div> <div class="p-body-content"> <div class="p-body-pageContent"> <div class="block block--messages" data-xf-init="" data-type="post" data-href="/community/index.php?inline-mod/" data-search-target="*"> <span class="u-anchorTarget" id="posts"></span> <div class="block-outer"></div> <div class="block-outer js-threadStatusField"></div> <div class="block-container lbContainer" data-xf-init="lightbox select-to-quote" data-message-selector=".js-post" data-lb-id="thread-29409" data-lb-universal="0"> <div class="block-body js-replyNewMessageContainer"> <article class="message message--post js-post js-inlineModContainer " data-author="Mike Maher" data-content="post-113942" id="js-post-113942" > <span class="u-anchorTarget" id="post-113942"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" > <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/community/index.php?members/mike-maher.21119/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="21119" data-xf-init="member-tooltip" style="background-color: #3d3d0f; color: #cccc33"> <span class="avatar-u21119-m" role="img" aria-label="Mike Maher">M</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/community/index.php?members/mike-maher.21119/" class="username " dir="auto" data-user-id="21119" data-xf-init="member-tooltip">Mike Maher</a></h4> <h5 class="userTitle message-userTitle" dir="auto">Newbie</h5> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/community/index.php?threads/1965-skylark-gran-sport-st300-transmission.29409/post-113942" rel="nofollow"> <time class="u-dt" dir="auto" datetime="2021-07-05T17:43:44-0600" data-time="1625528624" data-date-string="Jul 5, 2021" data-time-string="5:43 PM" title="Jul 5, 2021 at 5:43 PM" itemprop="datePublished">Jul 5, 2021</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/community/index.php?threads/1965-skylark-gran-sport-st300-transmission.29409/post-113942" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/community/index.php?posts/113942/share" aria-label="Share" rel="nofollow"> <i class="fa--xf far fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/community/index.php?threads/1965-skylark-gran-sport-st300-transmission.29409/post-113942" rel="nofollow"> #1 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-113942" data-lb-caption-desc="Mike Maher · Jul 5, 2021 at 5:43 PM"> <article class="message-body js-selectToQuote"> <div > <div class="bbWrapper">I would like to replace my original ST300 2 speed auto in my very original 26,000 mile Skylark Gran Sport 401 with a non computer 4 speed auto with a minimum of hassle.<br />What transmissions are suggested and what issues will I run into?<br /><br />Mike Maher<br />Iowa City, Iowa <br /><a href="mailto:mike1311@aol.com">mike1311@aol.com</a><br />319-330-0220</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> <article class="message message--post js-post js-inlineModContainer " data-author="Dr. Frankenbuick" data-content="post-113943" id="js-post-113943" itemscope itemtype="https://schema.org/Comment" itemid="https://www.teambuick.com/community/index.php?posts/113943/"> <meta itemprop="mainEntity" itemscope itemtype="https://schema.org/DiscussionForumPosting" itemid="https://www.teambuick.com/community/index.php?threads/1965-skylark-gran-sport-st300-transmission.29409/" /> <span class="u-anchorTarget" id="post-113943"></span> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.teambuick.com/community/index.php?members/dr-frankenbuick.3968/"> <meta itemprop="url" content="https://www.teambuick.com/community/index.php?members/dr-frankenbuick.3968/" /> <div class="message-avatar "> <div class="message-avatar-wrapper"> <a href="/community/index.php?members/dr-frankenbuick.3968/" class="avatar avatar--m avatar--default avatar--default--dynamic" data-user-id="3968" data-xf-init="member-tooltip" style="background-color: #666633; color: #c3c388"> <span class="avatar-u3968-m" role="img" aria-label="Dr. Frankenbuick">D</span> </a> </div> </div> <div class="message-userDetails"> <h4 class="message-name"><a href="/community/index.php?members/dr-frankenbuick.3968/" class="username " dir="auto" data-user-id="3968" data-xf-init="member-tooltip"><span class="username--staff username--moderator" itemprop="name">Dr. Frankenbuick</span></a></h4> <h5 class="userTitle message-userTitle" dir="auto" itemprop="jobTitle"><img src="https://www.teambuick.com/images/team_member_25x75.png" alt="Team Member"></h5> <div class="userBanner userBanner--staff message-userBanner" dir="auto" itemprop="jobTitle"><span class="userBanner-before"></span><strong>Moderator</strong><span class="userBanner-after"></span></div> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <a href="/community/index.php?threads/1965-skylark-gran-sport-st300-transmission.29409/post-113943" rel="nofollow"> <time class="u-dt" dir="auto" datetime="2021-07-06T05:31:37-0600" data-time="1625571097" data-date-string="Jul 6, 2021" data-time-string="5:31 AM" title="Jul 6, 2021 at 5:31 AM" itemprop="datePublished">Jul 6, 2021</time> </a> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <a href="/community/index.php?threads/1965-skylark-gran-sport-st300-transmission.29409/post-113943" class="message-attribution-gadget" data-xf-init="share-tooltip" data-href="/community/index.php?posts/113943/share" aria-label="Share" rel="nofollow"> <i class="fa--xf far fa-share-alt" aria-hidden="true"></i> </a> </li> <li> <a href="/community/index.php?threads/1965-skylark-gran-sport-st300-transmission.29409/post-113943" rel="nofollow"> #2 </a> </li> </ul> </header> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-113943" data-lb-caption-desc="Dr. Frankenbuick · Jul 6, 2021 at 5:31 AM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">Mike, No overdrive four speed automatic bolts directly to the Nailhead bell housing. It will require a bell housing adapter and extension for the flexplate bolted to the crank: <a href="https://www.ebay.com/itm/194120376689?hash=item2d3279e171:g:2wQAAOSwdEVgmqwI" target="_blank" class="link link--external" data-proxy-href="/community/proxy.php?link=https%3A%2F%2Fwww.ebay.com%2Fitm%2F194120376689%3Fhash%3Ditem2d3279e171%3Ag%3A2wQAAOSwdEVgmqwI&hash=97b486903e63ae8f33451209f3102e44" rel="noopener"><span style="color: rgb(84, 172, 210)">like this</span>.</a> Then your choices are the 700-r4, 200-4r, 4l60e and 4l80e. Some of the early 4ls have stand alone computers, but the 700-r4 and 200-4r won't require a computer. Any one of them will be need to be built for or adapted to your use. Any of them will handle your engine when this is done. Once you have selected, you will need to remount the crossmember, get the correct transmission mount, shorten your driveshaft, acquire and install the correct yoke for the transmission on the driveshaft, work out any exhaust clearance issues, <a href="https://shiftworks.com/collections/buick-products/products/1964-67-buick-skylark-factory-shifter-conversion-kit" target="_blank" class="link link--external" data-proxy-href="/community/proxy.php?link=https%3A%2F%2Fshiftworks.com%2Fcollections%2Fbuick-products%2Fproducts%2F1964-67-buick-skylark-factory-shifter-conversion-kit&hash=2e127de3f59ff6c350b6a038a99b4331" rel="noopener"><span style="color: rgb(84, 172, 210)">install the correct shifter kit and cable</span></a>, use larger 3/8" transmission lines (may have to bend yourself) and figure out any TV cable or computer wiring or mounts.<br /><br />Forced to choose, I would use a built 200-4r for a 4 speed, but personally I would use a three speed ST400 from a 65-66 Nailhead used in the big cars. You already have the wiring for a switch pitch trans, your converter would give you a little more stall in the ST400 and it bolts up to the Nailhead. You still have to do some of the fitting, will need driveshaft shortening, the correct yoke and lines and shifter modification.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="reactionsBar js-reactionsList is-active"> <ul class="reactionSummary"> <li><span class="reaction reaction--small reaction--1" data-reaction-id="1"><i aria-hidden="true"></i><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="reaction-sprite js-reaction" alt="Like" title="Like" /></span></li> </ul> <span class="u-srOnly">Reactions:</span><a class="reactionsBar-link" href="/community/index.php?posts/113943/reactions" data-xf-click="overlay" data-cache="false" rel="nofollow"><bdi>Bob</bdi></a> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article> </div> </div> <div class="block-outer block-outer--after"> <div class="block-outer-opposite"> <a href="/community/index.php?login/" class="button--link button--wrap button" data-xf-click="overlay"><span class="button-text"> You must log in or register to reply here. </span></a> </div> </div> </div> <div class="blockMessage blockMessage--none"> <div class="shareButtons shareButtons--iconic" data-xf-init="share-buttons" data-page-url="" data-page-title="" data-page-desc="" data-page-image=""> <span class="shareButtons-label">Share:</span> <div class="shareButtons-buttons"> <a class="shareButtons-button shareButtons-button--brand shareButtons-button--facebook" data-href="https://www.facebook.com/sharer.php?u={url}"> <i aria-hidden="true"></i> <span>Facebook</span> </a> <a class="shareButtons-button shareButtons-button--brand shareButtons-button--twitter" data-href="https://twitter.com/intent/tweet?url={url}&text={title}"> <i aria-hidden="true"></i> <span>Twitter</span> </a> <a class="shareButtons-button shareButtons-button--brand shareButtons-button--reddit" data-href="https://reddit.com/submit?url={url}&title={title}"> <i aria-hidden="true"></i> <span>Reddit</span> </a> <a class="shareButtons-button shareButtons-button--brand shareButtons-button--pinterest" data-href="https://pinterest.com/pin/create/bookmarklet/?url={url}&description={title}&media={image}"> <i aria-hidden="true"></i> <span>Pinterest</span> </a> <a class="shareButtons-button shareButtons-button--brand shareButtons-button--tumblr" data-href="https://www.tumblr.com/widgets/share/tool?canonicalUrl={url}&title={title}"> <i aria-hidden="true"></i> <span>Tumblr</span> </a> <a class="shareButtons-button shareButtons-button--brand shareButtons-button--whatsApp" data-href="https://api.whatsapp.com/send?text={title} {url}"> <i aria-hidden="true"></i> <span>WhatsApp</span> </a> <a class="shareButtons-button shareButtons-button--email" data-href="mailto:?subject={title}&body={url}"> <i aria-hidden="true"></i> <span>Email</span> </a> <a class="shareButtons-button shareButtons-button--share is-hidden" data-xf-init="web-share" data-title="" data-text="" data-url="" data-hide=".shareButtons-button:not(.shareButtons-button--share)"> <i aria-hidden="true"></i> <span>Share</span> </a> <a class="shareButtons-button shareButtons-button--link is-hidden" data-clipboard="{url}"> <i aria-hidden="true"></i> <span>Link</span> </a> </div> </div> </div> </div> </div> </div> <!--BEGIN GOOGLE--> <div align="center"> <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script> <!-- Team Buick, responsive, above the fold --> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-5874277334279308" data-ad-slot="4966361866" data-ad-format="auto"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); 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