<table cellspacing="0" cellpadding="0" border="0"><tr><td valign="top"><p dir="ltr">Thank you for this. I will bee printing it out and taking it with me. Much appreciated. </p>
<p dir="ltr">Bob has it right; I lost the cv shaft bolts and the cv killed the differential. On the bright side of things,I have a parts unit. </p>
<p dir="ltr">For those wondering, this is going into a 1970 square. </p>
<p dir="ltr">Adam</p>
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Jim Adney <jadney@vwtype3.org>; <br>
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<type3@vwtype3.org>; <br>
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<span style="font-weight:bold">Subject:</span>
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Re: [T3] Early vs Late Automatic <br>
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Thu, Dec 12, 2013 3:28:48 PM <br>
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<td valign="top">On 12 Dec 2013 at 6:37, Adam Douglass wrote:<br clear="none"><br clear="none">> I keep hearing of "early" vs "late" units. How do I identify one vs<br clear="none">> the other? What part numbers am I looking for? Where are the part<br clear="none">> numbers located? <br clear="none"><br clear="none">There are actually 3 generations:<br clear="none"><br clear="none">'68-9 had 5-bolt flanges around the output shafts. These were <br clear="none">eliminated in '70, making the construction slightly simpler, less <br clear="none">leaky, and more reliable. Very early ones came with torque converters <br clear="none">that had fewer, larger cooling fins. Those are less desirable, but <br clear="none">the later TCs are an exact replacement.<br clear="none"><br clear="none">'70-1 lacks the 5-bolt output flanges and has a vacuum modulator with <br clear="none">a
diaphram section (the large diameter part) that's less than 1/2" <br clear="none">thick. These are the best units in my opinion, but that's based on <br clear="none">very little data. If your car is a '69-71, this is the style you'd <br clear="none">hope to find.<br clear="none"><br clear="none">'72-3 looks just like the '70-1 except that the vacuum modulator has <br clear="none">a diaphram section that's more than 1/2" thick. If your car is a <br clear="none">'72-3, I hope you find one of these.<br clear="none"><br clear="none"><br clear="none">On ALL of these ATs, it's important to know that the vacuum modulator <br clear="none">is located in a place that's very vulnerable if the AT is sitting on <br clear="none">the ground. If the VM gets bent, you may be able to straighten it, <br clear="none">but it's likely that it will have to be replaced. And if you have to <br clear="none">replace it, it
MUST be adjusted, which is a fair bit of work.<br clear="none"><br clear="none">> I also hear that the automatic unit out of a Squareback is unique.<br clear="none">> What is the difference? Again, what am I looking for? <br clear="none"><br clear="none">Fastback and Squareback ATs are the same, but they are different from <br clear="none">all other VW ATs. Don't try to make do with a different version.<br clear="none"><br clear="none">> Any words of caution anyone has? I am pretty much stuck with this<br clear="none">> unit, but I want to know what I am getting. It can help on the price<br clear="none">> negotiation if I have more knowledge. <br clear="none"><br clear="none">If it's been dragged around on the ground the VM is toast. The late <br clear="none">VM is expensive, and you can't replace it with the early one. Try to <br clear="none">get it with the TC, but pull the TC off to check the snout on the <br
clear="none">tranny for wear where the seal seals. Polish that snout before you <br clear="none">reinstall.<br clear="none"><br clear="none">There is a dome cover on the upper left side that is sealed with an <br clear="none">O-ring. Replace that O-ring before you install the AT. It's just easy <br clear="none">to get to then, and that O-ring always needs to be replaced. I have <br clear="none">the O-rings or you may still be able to get them at a VW dealer. <br clear="none"><br clear="none">In general, our ATs have been very reliable. The most common problem <br clear="none">is that leaky o-ring and leaks around the output shafts that leave <br clear="none">the final drive dry and ruin the differential gears. Note that this <br clear="none">unit takes both ATF and GL-5, so make sure to drain and fill both.<br clear="none"><br clear="none">If you take off the AT pan to check it out and drain the fluid. Don't <br clear="none">overtighten the pan
bolts. Tighten to the spec torque, wait 5 <br clear="none">minutes, tighten again, wait 5 minutes, tighten again. I STRONGLY <br clear="none">recommend a set of Belleville washers here to replace the split ring <br clear="none">lockwashers that VW used. The Belleville washers will prevent <br clear="none">deformation of the pan, as long as you don't overtighten the bolts.<br clear="none"><br clear="none">It's a bit of extra work, but you might be wise to remove the output <br clear="none">flanges and replace the output seals before you install an old unit. <br clear="none">If it's been sitting a long time, there could be rust there that <br clear="none">would quickly destroy the seals and lead to oil loss and failure of <br clear="none">the final drive.<br clear="none"><br clear="none">When you go to install it, pull the TC off and check the inner shaft. <br clear="none">It will pull out and you'll want to spin it in your fingers as you
<br clear="none">install it to make SURE it's all the way in. Then install the TC. The <br clear="none">TC isn't in correctly until the stump in its middle is flush with the <br clear="none">mating face of the tranny. Check it with a straightedge. Make SURE <br clear="none">this is correct BEFORE you mate it to the engine.<br clear="none"><br clear="none">These ATs have been so reliable that I have to ask, what went wrong <br clear="none">with yours?<br clear="none"><br clear="none">-- <br clear="none">*******************************<br clear="none">Jim Adney, <a shape="rect" ymailto="mailto:jadney@vwtype3.org" href="javascript:return">jadney@vwtype3.org</a><br clear="none">Madison, Wisconsin, USA<div class="yqt6887038348" id="yqtfd32425"><br clear="none">*******************************<br clear="none"><br clear="none">_______________________________________________<br clear="none">VWType3.Org mailing list - <a shape="rect"
ymailto="mailto:type3@vwtype3.org" href="javascript:return">type3@vwtype3.org</a><br clear="none"><a shape="rect" href="http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org" target="_blank">http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org</a><br clear="none">Contact <a shape="rect" ymailto="mailto:gregm@vwtype3.org" href="javascript:return">gregm@vwtype3.org</a> if you need help with the list.<br clear="none"></div></td>
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