Tuned 6.4/ZF-6 Clutch options - Ford Powerstroke Diesel Forum
6.4L Performance Parts Discussion What has or has not worked for you?

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Old 04-08-2013, 07:50 AM
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Tuned 6.4/ZF-6 Clutch options

Right now my 08 is running a full 5" with DPF delete, K&N, EGR delete, and a Minimax and still on the stock clutch. For the most part I baby the truck around on Hot just for gas mileage but anytime I get on it the clutch slips even turned to to wild it still slips like crazy. I'm looking into upgrading the clutch this summer and was going to go with a southbend. Will the single plate suffice for running the hot tune, from what I've heard it will still slip and the twin plate is really the only option. Is that actually true? It wont be my first time DD'ing a twin plate so I'm not worried about drive-ability but the cost difference is pretty big between the two. The single disk is claimed to be rated to 450 hp/900 ft/lbs is my setup really going to be pushing those limits? I really don't have any more performance modifications planned for the truck. Just looking for any advise from the other 6 speed guys.


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Old 04-08-2013, 08:31 PM
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Southbend sells a single plate rated for 450HP ceramic. I use it pulling my 5ver and it won't slip. It is noisy though.
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Old 04-09-2013, 05:42 AM
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Southbend 3600 .. I think the part number is FDDC360064. I Dont have a zf6, but there are other members that do who actually say the 3600 pedal is better than stock
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Old 04-09-2013, 06:03 AM
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I had a Southbend 3600 in my 01 Ram and I LOVED that clutch. No matter what I did, it never slipped and I was making somewhere around 450/500 with the truck. Pedal wasn't horrible either. Also, I'd ditch the K&N filter... they aren't a good filter to put in front of the turbos on these trucks
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Old 04-09-2013, 07:17 AM
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Yeah I've heard the all about the K&N already
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Old 04-10-2013, 07:53 AM
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I followed up with southbend and they told me the twin disk is a must on the tuned 6.4s. They also told me the price would be going down to 1200 on em this summer.
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Old 04-10-2013, 09:20 PM
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I have the southbend single plate 450hp ceramic and have been running it with a 4" dp back, afe intake, and egr delete on the sparten 275 and 310 for about 7 months and it hasn't slipped yet. It is a little grabby though but on the lower tunes its much smoother.
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