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Seneca Kansas 66538 | The transmission problem you are talking about doesnt destroy the transmission. What happens is a nut that holds 5th gear on can tend to vibrate loose under high torque loads (yes putting in 5th gear and lugging at low rpms) If the nut backs off, all that happens is you will lose the 5th gear in your shifting sequence (caused by gear sliding out of place on shaft) and will be left with only 4th and lower gears. To fix, remove the rearward aluminum portion of transmission and get the updated locking nut from dodge and reinstall with locktite, under most all conditions this solves the problem but try not to shift into 5th gear prematurely at low rpms and lug engine in this gear or I have heard that it can knock the nut back loose again. This NV4500 transmission was also used by GM in there 5sp manual applications but they didnt have a problem in GM light trucks from my understanding. The 5.9 is a luggin beast and is the culprit to the 5th gear nut issues, but properly addressing the problem should set you trouble free for many miles. The NV4500 is a very durable, easy shifting, trouble free manual transmission for most all applications that they were used. P.S. Welcome to the board Tyler, The KDP was also and intermittant issue with the dodge cummins. When cummins built the timing cover they had a dowel pin hole which was left open allowing the alignment dowel pin to at times vibrate loose and work its way through the timing cover thus falling into the timing gears. When struck by the timing gears they tend to either produce failure on the gear train or else the gear train propels the dowel pin through the side of the timing cover producing a hole which will drain engine oil out very quickly. This has been addressed with different techinques including cleaning the surface well and using a wicking type locktite to lock the dowel pin or building a tab to go over the dowel pin and locking it in place with a local timing cover mounting bolt. Another issue that properly addressed can be fixed relativly reasonably and will last the life of the engine. To find more info about the killer dowel pin, do a search for KDP on your internet search bar and many sites will come up helping address and explain the issue. Again welcome Tyler-----Uncle B | |
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1994 Dodge Cummins Diesel
