Overall, there are a ton of options when it comes time to replace the clutch in your NV4500. What does it do you may ask? Well, it falls off, and when it does, bad things happen! To alleviate this issue before it causes you a major headache, all that must be done is to simply weld the nut in place, and its a very common procedure, especially during clutch replacement. The most common failure of the NV4500, beyond normal clutch wear, is the dreaded 5th gear nut. That being said, one of the most popular upgrades for an NV4500 is to bump it to a 13" flywheel and clutch kit, and especially for those going to a dual disc, to also upgrade to the larger shaft. For comparison sake, the NV4500 model featured a 12.25" flywheel and 1.25" diameter input shaft where the NV5600 had a 13" flywheel and 1-3/8" shaft. For several years, there was a bit of overlap between the five speed NV4500 and six speed NV5600. In terms of light duty diesels, the NV4500 was used in Heavy Duty, Cummins equipped Rams and some V10's from 1994 through early 2003 model years. Pretty bold statement, right? Well, those aren't necessarily our words, but ones we hear expressed day in and day out, and while we may agree to some degree, it has proven itself as a great option. The NV4500, built by New Venture and used in numerous applications, is arguable the best manual transmission ever produced.
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