2001 Dodge 3500, 112,000 mi, 5.9 Cummins, 4X 4, Long Bed with NV5600 6 speed transmission. Just went out again for the 3rd time. Failures were at 82,000, 97,000 and now at 112,000. Had regular dealer service. Use it to haul a 40' gooseneck and a Case 1155E loader tipping the scales at 25,000 lbs.
Parts are really hard to find. Last time I had to buy a core for $500 just to get parts for the rebuild by a heavy truck tranny shop. Problem seems to be in the 5-6 gear section with seized bearings.
Spoke with a rebuild shop in Ohio and they have started drilling lube holes in the case and bearing shell and claim they have not had any failures since they started. Anyone have experience with this procedure???
I am changing the NV5600 out for a Fuller FSO-6406A. It has a 660 HP rating with 6th OD at .78. These ratings are close to that of the NV5600.
This is not new or innovative. The Freightliner FL 70 has used the FS6406 6 speed since '93 and Ford has used Fuller's with Cummins on the F650 and F750 since 2003.
Since Fuller never has had a married transfer case, the transfer case would have to be divorced. Need to find the correct clutch set up that is used with the medium duty truck. Would need a #2 SAE flywheel housing and 1-3/4" clutch.
Parts are readily availabe for Fuller and never have to worry about synthetic oils--should be good for 500k miles or more.
Local trans shop has a NV5600 for $1000. Needs output shaft and bearing. Synchros and all gears look good. Mine will be available as soon as I complete the change-over. I suppose someone will want pictures and part numbers.
Parts are really hard to find. Last time I had to buy a core for $500 just to get parts for the rebuild by a heavy truck tranny shop. Problem seems to be in the 5-6 gear section with seized bearings.
Spoke with a rebuild shop in Ohio and they have started drilling lube holes in the case and bearing shell and claim they have not had any failures since they started. Anyone have experience with this procedure???
I am changing the NV5600 out for a Fuller FSO-6406A. It has a 660 HP rating with 6th OD at .78. These ratings are close to that of the NV5600.
This is not new or innovative. The Freightliner FL 70 has used the FS6406 6 speed since '93 and Ford has used Fuller's with Cummins on the F650 and F750 since 2003.
Since Fuller never has had a married transfer case, the transfer case would have to be divorced. Need to find the correct clutch set up that is used with the medium duty truck. Would need a #2 SAE flywheel housing and 1-3/4" clutch.
Parts are readily availabe for Fuller and never have to worry about synthetic oils--should be good for 500k miles or more.
Local trans shop has a NV5600 for $1000. Needs output shaft and bearing. Synchros and all gears look good. Mine will be available as soon as I complete the change-over. I suppose someone will want pictures and part numbers.