im sick of auto trans. can someone give me a smokin deal on a 6 speed for my 99 24v 4x4?
i need everything, tranny, t-case, drivelines,tps, pedals, console, column, etc. i hvae a good working auto if anyone is interested in a partial trade? it does slip in second, but has all kevlar clutches and bands, ats vb, axiom triple disk billet converter. only has 21k miles

 

which one ya want ???

Dodge introduced the NV5600 6 speed in 1998. The early version, which is found in 1998 to 2000½ models is known to have synchronizer problems and a weak input shaft. Midway during the 2000 model year, a much improved NV5600 was introduced with a heavier 1⅜" input shaft and reliable synchronizers. At the same time, the old 12.4" clutch was dropped in favor of a 13" unit.

The NV5600, which weighs in at 465 lbs. is rated to handle nearly 20% more torque then the NV4500HD five speed. First gear and high gear are essentially the same ratios for both the NV4500 & 5600. Reverse gear is lower in the 5600 then most 4500's. The direct gear (1:1 ratio) for the 5600 is 5th, in the 4500 it's 4th. From a drivability standpoint, the difference between the two transmissions is the close ratio spacing of the 5600 doing in five gears what the 4500 does in four. Close shift ratios is a great asset for hauling and towing but a bit of a liability for daily city driving. The 6th or overdrive gear is mounted on the front of the mainshaft instead of the back like the NV4500. Consequently, the NV5600 does not have the problem of the mainshaft nut backing off.

Upgrading Your Dodge To The NV5600 6 Speed

Installing a NV5600 6 speed in place of a NV4500HD in 1994 and newer trucks is a straight forward job. The conversion usually requires buying a new clutch with a 1.375" hub to match the input shaft of current production NV5600s, but it is possible (although not recommended) to get an early production transmission with a 1.250" input shaft.

 

id like to get the 01-02 so i dont have the sycro problem and a want a the bigger clutch. what shaft diameter do i need to get? will the 1.375 shaft work?

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mind you my truck is an automatic right now

 

Unless your pullin a lot a weight on a regular basis or do most all highway driving it's cheaper and easier to find an NV4500 and will serve your purpose much better. In my case I'm pullin as much as 30,000 pounds during hay season with highway gears and a 5 speed with no problem. I still rarely use 1st gear for anything.

Just an idea to save a few thousand dollars on the conversion.

 

my truck sees mostly highway driving some offroad and hauls heavy loads around my small town, usually a paver, backhoe or junk cars. running 4:56 gears is the reason i want a 6 speed just so i can still have some top end speed and not be spinnin 3 grand just to do 75mph

 

5 and 6 speed both have the same high gear.

 

Yep. Both the 5-speed and 6-speed manuals have essentially the same O.D. gear ratios (0.73:1). No matter which one you pick, with your 4.56 axle gearing, your highway RPM's will be fairly high, even with your 38" tires. According to this simple calculator, 4Lo.com :: Final Gear Ratio, Crawl Ratio, Tire Size Calculators you'll be a bit above 2200 rpm's @ 75 mph. Actually just a fuzz lower than my truck with 33's and 4.10's.

For comparison, the O.D. in your auto is actually higher than the manuals, 0.69:1.

 

2200 rpm is 75 as of now with the auto still in it. anyone know anyone with a 5 speed with t-case and everything else i need for a good price??

 

NV4500's are easy to come by, parts are cheap in comparison to the 5600 series and they are simple to rebuild. Make a post in the Wanted Section of the site and you should have no problem findin one available.

 

Not trying to take over the thread but how reliable is the 4500 and how hard is it to swap and how much would it cost to do the swap and would the 4500 be a goood swap from auto

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bump any one