Question about 1999 Dodge Ram

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1997 Dodge Ram 2500 manual transmission overdrive.

I've purchased a 1997 2500 Dodge diesel with a 5 speed overdrive manual trans. I had the 5th gear, overdrive back off the shaft. It was replace with the new, improved nut and up to date information. In less than 2000 miles hauling my R.V. trailer, it fell off again. I've been told that there is nothing left for me to do with it. The truck is mint and only has 103,000 which is nothing for a diesel. I'd hate to lose this jewel because it fits me to a tee. Any ideas how to permently fix with problem?
webertg@elknet.net

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  • webertg Aug 03, 2008

    Is the 6 speed overdrive a better transmission than the 5 speed and will it bolt onto the 1997 bell housing and clutch? What is the long term prognosis for 5 speed with the different shaft? Is it a monster job to just replace the shaft?

  • webertg Aug 06, 2008

    After extensive research and talking with rebuilders all over the country, I've come to the conclusion that there is no cure for the NV4500 transmission's problem with the 5th, over-drive. Even with the best aftermarket repair kits or even rebuilt transmissions, you will be luck to get 50K on a rebult trans that is used primarily for INTERSTATE DRIVING where the 5th gear overdrive is constantly in use especially if one is hauling a trailer. The design flaw of the trans makes it impossible for ANY long-term fix and the reason why the designer of the trans went belly-up.

  • Anonymous Mar 15, 2009

    can i use a 6 speed tranmission on my old 97 wich i already rebuilt my 5 speed one. two times

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There is a permanent fix for the 5th gear failure on the NV4500 5spd, but its not cheep!
Quad 4x4 has a new patented main shaft and gear that is guaranteed for life (torque king ) it will be the last fix you do . none of the other after market shafts will hold 5th gear on ...Only the quad 4x4.com has the only completely new design

Posted on May 17, 2009

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There is the possibility that the fifth gear was put backwards on the shaft. It is possible to do this, and your result will be the nut coming back off very soon. We have a truck with almost 300k miles at work that has had the fifth gear nut come off three times. The nut must be torqued to something around 675 ft/lbs, which you cannot get with anything but a super big torque wrench. One local repair shop broke two Snap-On 3/4" torque wrenches in the process on one particular transmission. I have seen a repair shop torque the nut down, and then spot weld the nut to the shaft to prevent it from backing off. This may seem drastic, but it holds.

Posted on Dec 01, 2008

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That transmision should be a New Venture 4500,and there is an aftermarket output shaft available with later updates that is supposed to prevent the nut from backing off.At this point,.i would advise going with a remanufactured trans from a company such as Jasper...They have a standard 3 year,36k mile warranty,and that is probably going to be your best value.It sounds like the guy that built your trans just isn't very good at it.Jasper will honor their warranty,no questions asked.Tell the guy that repaired your trans,you want your money refunded as he did JUNK repairs.Any repair shop will have given you SOME kind of warranty.If he doesnt satisfy you,contact the Better Business Bereau,and take him to small claims court to get your money back.Also have you truck towed out of his shop to a more reputable one.

Posted on Aug 03, 2008

  • David Fleming Aug 03, 2008

    Yes,it's a very involved process installing the new aftermarket output shaft,the 6 speed is a very good thought,and while i'm not certain about the interchangeability of the 6 speed where the 5 speed was,but i am certain that a remanufacturer like Jasper,would know about interchange.The thing with the NV4500 trans is,setting the endplay specifications is crucial to the longevity of the trans,while the input shaft,at the same time is just as important that it is properly supported in the crankshaft flange,by the pilot bearing.A new pilot bearing should be installed when the trans has been worked on internally.All the updated parts are fairly pricey,the new 5th gears too.There is also a less expensive route,and that is a good used from a salvage yard.LKQ offers a year warranty for a little more money,another possible avenue.Good luck..

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