I know knott one thing about transmissions, just bounced in to say welcome to the forum Winchested.Holy thread necro here,
I'm currently rebuilding one of these GM NV4500s it's a 95.
The mainshaft output splines are toast as were the Np241 input splines. The 5th gear nut was loose, I used a Chevy 1/2 ton 4x4 spindle socket fits perfect. Was only $20 bucks compared to the $200-300 they want for the proper socket. But was hand tight.
This has the damper on it which I'm going to say is possibly what destroyed the output splines.
Should I re use it or cannibalize it for the center section and just run it as a spacer?
This will be going behind a 5.3 or 6.0 LS with an NWF doubler and NP205.
I plan on buying the transparts Warehouse kit. As it's the cheapest I can get into Canada for the early GM nv4500.
Someone early mention SMF? What the eff is that?
Thanks for any pointers.View attachment 73711
My son has two IH Scouts. 196?, one is a special built unit.Thanks for the welcome Mr Marty and thanks dieselAm! I think I'm going to build it without the damper.
Ill be using an 04/05 LS flywheel and clutch. External slave and TOB.
Its all going in a 79' IH Scout SSII.
My son has two IH Scouts. 196?, one is a special built unit.
Do a search for IH Red Carpet Special. The one He has came out of the Lewistown Montana dealer.
More on the PTO cooling fins?The synchros have a friction material on the inside of the brass ring that can wear out quicker than the teeth themselves. This is what slows the input shaft down and allows for smooth shifts. This is why the correct fluid is so critical. Incorrect fluids will cause premature wear and failure of this material.
I also highly recommend a transmission temperature gauge. I use PTO cooling fins on mine which come with a port for a trans temp probe.
Good luck with the move and best wishes for your new start
Thanks@smokymtn65 here's a link to what I have on my NV4500. As noted in my sig you have to shave down the fins a tad on the driver side so the driveshaft clears as these were meant for Dodge NV4500 trucks
The TRANS-COOL fin cooling system is uniquely designed to transmit heat from the inner fins to the outer fins, thus dissipating heat from the Dodge Turbo Diesel manual transmission.www.genosgarage.com
These coolers are also for the NV4500 and as far as I know will fit without having to do any modification. The link is for just the coolers where you re-use your existing PTO covers. They sell a more expensive kit with a sight glass and matching covers.
Fast Coolers-Transmission Coolers (Dodge NV4500 and NV5600). Made from extruded aluminum, the finned coolers also increase gearbox fluid capacity by two quarts (one quart per side). The coolers also have a 1/4 NPT fitting to allow the owner to easily add a transmission temperature sending sensor. Upuredieselpower.com
I went went with the first option because the fin design appeared to be more efficient in cooling, a sentiment also echoed in this thread where I came across them in the first place
Hey all, after an amsoil oil change on the 93 NV4500, I am experiencing what 88GMCtruck did: scratchy shifting. I am thinking the older NV4500s with the low gearing and old style top cover may really require the GM fluid only. So anyways, yet another expensive oil change is on the horizon...www.thetruckstop.us