Tore down three of my spare M5ODs to build a legitimate one.lol
Quick back story...
I bought the truck with a "recently rebuilt" trans. A week or two after I starting driving the truck the trans started making noise, then one day I just lost 3 and 4...turned out the shift collars were installed backwards and wore down the shift forks...so I built my first hybrid trans by just swapping 2.5L guts onto my 4x4 shaft and dropping everything as is into my 4.0 case... I just wanted to see how it worked. I liked it, but after two years the pocket bearing started making noise. Turns out I used a bit too much RTV on the front cover and the excess oozed in plugging the oil supply hole to the slinger that feeds the pocket bearing.
Soo bought a M5OD HD trans and another 2wd 4 banger trans as well as a rebuild kit with bearings and synchros. I built another hybrid and it was nice a quiet and shifted like butter.... but I decided to show off how a locked rear does a knarly burnout and snapped the output shaft off in the trans.
So I needed to get the truck going and needed it done quickly. I couldn't find any 4.0 4x4 trannies but I found a 3.0 4x4 trans local. I bought it and swapped guts in the school parking lot and got her going. I immediately noticed it chirped into 3rd and had pocket bearing noise... I said screw it and ran it for the last 20k.
In the mean time, I swapped all the 4 banger gears off the busted output along with the rebuild kit bearings and such onto a 2wd shaft left from one of the hybrid builds and dropped it into the 3.0 case I had from the last rebuild on the blue truck. I then used that 2wd 3.0 trans to 5 speed swap my 99 3.0 DD at the time.
So now 2 years later the trans in the blue turd is making all sorts of noises and getting worse by the day
I am using my original 4.0 case, the gears from my original hybrid, but I am using all the low mileage parts like the input, updated synchro assemblies, and reverse/5th from the HD trans. I picked up a 4.0 4x4 trans from a buddy that was stuck in 4th for dirt cheap. Im salvaging the output shaft out of it. The rest is junk. It looks like the the truck was probably stuck in the mud and they ran it in reverse long enough to starve the input and pocket bearing of lubrication. The first two synchros were melted, the input gear was trashed, the collar and bearing were blued from getting hot, the slinger was melted and in pieces, etc.
I also ordered all new main bearings, seals, and a shim kit to build this one right.lol
Case all cleaned up.
Old synchro compared the updated coated one
3 trannies apart at once....what could go wrong?
Hard to see in the pic..but here is the trashed nose on the output from the first trans.
It feels like 60 grit and has lobes.lol
Im taking all the stuff I am using to work to clean it up in the parrs washer to assure there is no junk in the needles.
Sent from my XT907 using Tapatalk 2
Welcome Visitor! Please take a few seconds and Register
for our forum. Even if you don't want to post, you can still 'Like' and react to posts. 
