Performance and Accessories 2nd gen only Talk about Dodge/Cummins aftermarket products for second generation trucks here. Can include high-performance mods, or general accessories.

Dual Disk Clutch and 1 3/8 input shaft

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Old Mar 10, 2006 | 01:31 AM
  #1  
Big Smoky's Avatar
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From: Elgin, TX
Dual Disk Clutch and 1 3/8 input shaft

I'm looking very seriously into getting a dual disk clutch. I've never done one before, so that rasies a few questions. Is it nessicary to upgrade to the 1 3/8 input shaft? How hard is the shaft to install (I've never liked the idea of taking my tranny apart!)? And how hard is the clutch itself to install? Thanks guys

Eric
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Old Mar 10, 2006 | 07:22 AM
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im pretty sure that you have to upgrade to the larger shaft. Check out south bend. the 5 speed is different from the 6 speed so i dont know much about them, but the 6 speed is a nightmare! not the adverage do-it-your-self replace job

the clutch on the other hand is really easy. bolt on the new flywheel, 1 clutch disk, floater plate, 2nd clutch disk, then the pressure plate. 5 minutes tops.
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Old Mar 10, 2006 | 07:31 AM
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The input shaft on the nv4500 is screamingly easy. I just put one on for my dual disk southbend. It's literally 4 bolts, I THINK they're 9/16. Either that or 1/2. Anyway, there's a front plate that surrounds the input shaft. Unbolt it, and it comes off. You just grab the shaft and pull it right on out. While doing this, take note of the clocking of the cover you just unbolted, relative to the case of the transmission. There's a funny looking bearing countersunk into the BACK of the shaft. The new shaft comes with a new bearing, though it's probably not stuck in the shaft when you pull the new one out of the box. Stick it in there, and stick the new shaft through the new cover they supply. Be gentle so you don't tear the seal. Now, just slap it right on back in there, and replace the 4 bolts. That's it.
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Old Mar 10, 2006 | 08:28 AM
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Thats sounds easy! That makes me feel a whole lot better about the input shaft on the 5spd. I just don't know which disks goes where (sounds stupid, I know). Thanks for the assistance.

Eric
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Old Mar 10, 2006 | 08:32 AM
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From: Alabama
Please note that I have not actually replaced the clutch yet-I simply put the input shaft in my spare transmission. I don't have a spare because of problems with the transmission-it was simply part of the deal when I bought the truck.
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Old Mar 10, 2006 | 10:38 AM
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Originally Posted by v8440
The input shaft on the nv4500 is screamingly easy. I just put one on for my dual disk southbend. It's literally 4 bolts, I THINK they're 9/16. Either that or 1/2. Anyway, there's a front plate that surrounds the input shaft. Unbolt it, and it comes off. You just grab the shaft and pull it right on out. While doing this, take note of the clocking of the cover you just unbolted, relative to the case of the transmission. There's a funny looking bearing countersunk into the BACK of the shaft. The new shaft comes with a new bearing, though it's probably not stuck in the shaft when you pull the new one out of the box. Stick it in there, and stick the new shaft through the new cover they supply. Be gentle so you don't tear the seal. Now, just slap it right on back in there, and replace the 4 bolts. That's it.
I have replaced a few input shafts but you HAVE to make sure your end play is suffucient. Most the time you do not have to worry about it being to loose but if it gets to tight... by by tranny. If end play has to be adjusted the tranny has to come apart if not you are in good shape. There is also a cone bearing pressed onto the shaft that will haft to be installed with all likely hood. When you order the shaft I would order a new bearing with it instead of trying to press the old one off and reusing. Hope things go well!!!!
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Old Mar 10, 2006 | 10:40 AM
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My southbend input shaft already has the bearing installed.
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Old Mar 10, 2006 | 10:46 AM
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Yep, trannies have roached that did not have the endplay checked and adjusted.

Don~
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Old Mar 10, 2006 | 11:39 AM
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The last shaft I put in seemed to make all end play disappear, not a surprise with the size difference in the shaft.
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