Coming home from the gym last night, no trailer, no nothing, and btw I am completely stock so like 200 hp at the flywheel or less, and I heard the strangest sound a transmission could make when I was about to crest a hill, sounded like cats having a brawl in an alley or something, then it went clang, clatter, crunch and crash, now I have no forward or reverse gears and coasted to the shoulder... Mainshaft is broke I think, we pulled the drive shaft and yoke out of the back of the tranny, btw the seal is now definitely wallered out, and the output shaft will move up and down, side to side about 2 inches and can be pushed in about half an inch and out the same. Something aint right...... Fluid changed at 100k, 150k and 180k with pennzoil synchromesh that meets ms9224 spec, 5 quarts in it. What all do I need to do to put a 5 speed in the truck? I know I will need a clutch with 1 1/4 splines. What else? How different are the driveshaft lengths?? This is an 01 dually quad cab 2 wheel drive.

:thumb1:I'll have to find the pics i took of the brackets, you want the FSO 8406A and yes you have the FSO correct the 840 is the nominal torque 6 # of gears. You need the SAE #2 thats a tight fit,the web site i gave you had a few on it(Cummins ISB/5.9)the #2 Bell housing will mate up, if you look close they have Trans mounting tabs(use a sawsall and cut them off).I'm sure you can order from Cummins or Freightliner,would be very costly,starter access needs to be RIGHT SIDE. On the road now when i get home i'll look up some part #'s. The driveshaft needs lengthened/and larger u-joint in front, the slip/spline in the center is for travel of rear axle.Solid from Trans to Center mount. Go to www.grimmjeeper.com/gears.html both the NV5600 and Eaton Fuller FSO 8406A are listed showing ratio's/rpm's/speed/tire size's to compare side by side.

Seems like the FSO 8406A is an expensive beast! I read elsewhere that it is possible to convert an FS XXXX to an Overdrive somehow, and also possible to convert an FO to an FSO. Do you have any information on this? I can get my hands on an older FS or FO transmission cheaper than I can get a FSO 6406 or 8406.... Thanks for the info!!!

Seems like the FSO 8406A is an expensive beast! I read elsewhere that it is possible to convert an FS XXXX to an Overdrive somehow, and also possible to convert an FO to an FSO. Do you have any information on this? I can get my hands on an older FS or FO transmission cheaper than I can get a FSO 6406 or 8406.... Thanks for the info!!!

What have you found them for? I paid $1500 for mine

Thats a good buy! Well I went to a heavy duty truck junkyard by my house, they wanted 4500 for a FSO 8406 used... 3800 for a 6406 FSO Only had a couple...

Really haven't had any luck finding a eaton with overdrive around here. Been looking into rebuilding the nv5600 myself, but after doing some research, it aint happening. Found a list of the little press adapters and stuff someone on another forum put together,

Found a few of the tools for sale online, 5 tools I could find added up to over 1,000 bucks. Plus I don't have a 100 ton press, apparently the 50 ton I have wont do the job.... So I am definitely going to have to find a used nv5600 probably, an eaton would be nice but they are rare.

What kind of price have you found on used NV5600's,did'nt forget about sending pics and looking up receipts(just can't find most of receipts,thought had all in one envelope)pics i think are one an old hard drive,need to try and get them recovered.:banghead:

What kind of price have you found on used NV5600's,did'nt forget about sending pics and looking up receipts(just can't find most of receipts,thought had all in one envelope)pics i think are one an old hard drive,need to try and get them recovered.:banghead:

$1200~$1600. Used and of course I would have no idea what kind of shape it is in, and you know how people are-they will tell you anything to sell their junk. If this tranny didn't require $10,000 dollars worth of special tools and press adaters to work on, I would be all for just buying one. Guess I will just have to take that chance when I get fed up with not having an extra truck up and running.

What it cost to go through yours?