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Tech & Fab
TF904 / A904 / 30RH upgrades
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<blockquote data-quote="patooyee" data-source="post: 611369" data-attributes="member: 483"><p>I'm going to be installing a Transgo th3 (<a href="http://www.transgo.com/products.php?prd=TF-3&homeinclude=catalog&category_id=60&parent_id=29&product_id=80&countdisplay=4&start=0&addcountview=Yes" target="_blank">http://www.transgo.com/products.php?prd=TF-3&homeinclude=catalog&category_id=60&parent_id=29&product_id=80&countdisplay=4&start=0&addcountview=Yes</a>) full manual kit. I spoke to them about using it on the lockup trans and they gave me some special instructions to make it work. (adding a .25" rubber check ball infront of the lockup valve to prevent it from venting lockup supply in conjunction with my custom non-lockup converter.) In addition to that they told me to pin the throttle valve all the way so that the trans is running at full pressure all the time. (Since I have no throttle linkage.) It is my understanding that the Transgo kit increases pressure across the board? Is there something else I need to do?</p><p></p><p>I was able to fit a 5th clutch in the direct drum by replacing the inner pressure plate with a spare outer stepped plate that I machined slightly to fit the snap ring. I also had use two of the thinner forward clutches instead of one of the thicker direct clutches to make that happen.</p><p></p><p>My stock 30rh forward drum had 3 clutches in it. I used an a500 forward drum instead which had 4. I tried the same trick with the forward clutch pack but 5 clutches was just too much, there was no clearance under the snap ring, and the clutches were obviously too tight up against each other.</p><p></p><p>So I've got 5 direct clutches and 4 forward. My understanding is that the direct drum takes most of the abuse and is where more clutches are most beneficial anyway. Even 5/4 is an upgrade from my stock 4/3.</p><p></p><p>My rebuild kit came with a few teflon replacements for some of the steel rings but then some steel replacements for a couple teflon rings. I knew you said Teflon was better but This build was dragging out to a month long and I didn't feel like dragging it out another week to wait for teflon replacements to get here. My thoughts were that the benefits would be primarily longevity and this transmissions doesn't need to last 100,000 miles. Maybe I'm wrong but it is what it is as this point.</p><p></p><p>It doesn't need to handle 700hp. 350 hp in a 2500 - 3000 lbs rig is all.</p></blockquote><p></p>
[QUOTE="patooyee, post: 611369, member: 483"] I'm going to be installing a Transgo th3 ([url=http://www.transgo.com/products.php?prd=TF-3&homeinclude=catalog&category_id=60&parent_id=29&product_id=80&countdisplay=4&start=0&addcountview=Yes]http://www.transgo.com/products.php?prd=TF-3&homeinclude=catalog&category_id=60&parent_id=29&product_id=80&countdisplay=4&start=0&addcountview=Yes[/url]) full manual kit. I spoke to them about using it on the lockup trans and they gave me some special instructions to make it work. (adding a .25" rubber check ball infront of the lockup valve to prevent it from venting lockup supply in conjunction with my custom non-lockup converter.) In addition to that they told me to pin the throttle valve all the way so that the trans is running at full pressure all the time. (Since I have no throttle linkage.) It is my understanding that the Transgo kit increases pressure across the board? Is there something else I need to do? I was able to fit a 5th clutch in the direct drum by replacing the inner pressure plate with a spare outer stepped plate that I machined slightly to fit the snap ring. I also had use two of the thinner forward clutches instead of one of the thicker direct clutches to make that happen. My stock 30rh forward drum had 3 clutches in it. I used an a500 forward drum instead which had 4. I tried the same trick with the forward clutch pack but 5 clutches was just too much, there was no clearance under the snap ring, and the clutches were obviously too tight up against each other. So I've got 5 direct clutches and 4 forward. My understanding is that the direct drum takes most of the abuse and is where more clutches are most beneficial anyway. Even 5/4 is an upgrade from my stock 4/3. My rebuild kit came with a few teflon replacements for some of the steel rings but then some steel replacements for a couple teflon rings. I knew you said Teflon was better but This build was dragging out to a month long and I didn't feel like dragging it out another week to wait for teflon replacements to get here. My thoughts were that the benefits would be primarily longevity and this transmissions doesn't need to last 100,000 miles. Maybe I'm wrong but it is what it is as this point. It doesn't need to handle 700hp. 350 hp in a 2500 - 3000 lbs rig is all. [/QUOTE]
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