Besides the fact that it weighs over 400 lbs, anyone have any tips to removing the trans?
Also, is there any way to tell what size the input shaft is without pulling the trans? I am not sure when they started using the larger input shaft.

Mine is crapping out @ 78K miles..... The trusty Haynes manual has no info for the nv5600. I can figure it out but if someone has step-by-step it would be greatly appreciated. I guess the only good thing about all this is that HighGear Transmissions is here in Memphis and they do the majority of the work on these trans for people around the country. And, yes, my truck came w/the 6spd from the factory.
Thanks in advance.

 

The 2000 model year is confusing with the imput shaft info stating they went to the 1.375 size in 2000.

I just had mine pulled for a clutch change out and I had the same question.

What I found out was if you have 3/4" spacer at the starter you have the
1.375" imput shaft. Mine did not and it had the 1.25" imput shaft. My trucks service date is 12/99.

It is possible to upgrade the imput shaft while you have it out. I checked mine with some dye penetrate looking for cracks and hair lines. Did not find any. I don't tow over the factory recommended combined weight anyway, so I did not go to the larger imput shaft even though the tranny was opened. That is a long story how a clutch change out led to a tranny disassembly.

Dave

 

I have also read that the 3/4" spacer at the starter denotes the larger input shaft.

Kurt

 

I will definitely check that. I have been needing to replace my starter for some time now anyways. It spins sometimes but doesnt turn the motor over. Is there anything to watch for when taking this trans out???

 

Here you go! Good luck!

http://www.turbodieselregister.com/f...ad.php?t=37544

 

make sure you tahe the shifter tower off it will not clear the floor.

 

First thing to do is buy a good trans jack that is rated for at least 1000 lbs. The trans jack must be a low boy type that slides under a vehicle like a regular type of jack would.
Also you will need two 2 (or longer) foot long 3/8" extensions that you can buy at Autozone.
An engine turning tool (also known as a barring tool) from snap-on is also recommended for locking the flywheel in position.

I would also advise that you buy some jack stands or ramps to raise your truck off of the ground by an extra foot or so (both ends).

Disconnect the linkages from your shifters, disconnect all sensors from trans. Disconnect the front drive shaft from transfer case. Remove rear drive shaft.
Remove transfer case from rear of transmission (this can be done by two or one person depending on strength and size of the person).

Secure transmission to the transmission jack and start unbolting the bell housing bolts that connect to the transmission adapter.

You should be able to pull the transmission somewhat straight back and down to clear the input shaft out of the clutch/flywheel assembly.

Remember use caution the NV5600 is heavy enough to kill you.

 

Thanks for the advice. I think I have access to everything but the barring tool. Might even have that. The guy that has taught me nearly all my mechanical "knowledge" was a diesel mechanic for 20+ yrs or something like that. I am going to get him to help. When I decide how I am going to pay for all this I'll pull it out and the shop said they would have it for 2-3 days. They know these transmissions really well. I wonder if I can trade them some landscaping for this?

 

Remember to chain it tightly to the jack. Also the center of gravity on these puts the jack almost under the crossmember. It also helps to lower the rear of the trans to allow access to the two top bolts in the bellhousing. Take these out first, then the others. Raising the front of the engine helps in removal and installation. If everything is set up correctly, it is one of the easiest removals and installations to do. Just remember, it is a heavy beast and hard to balance correctly when removing. It is hard to tell you got it wrong, until it is too late.

Robbie.

 

Some leave the transfer case attached, but I recommend to always remove it- even when using a hoist. It just makes the load less awkward, and less lethal.