What happened???????

I was driving the jeep across the field just a few minutes ago,stopped it to check on the cows,got back in and when i went to pull out it made a chunka chunka chunk sound and then it locked up,so i put it in low and tried to see if i could just move it a little bit and it wont go anywhere. The main bearing was making some noise before but just a few slight noises once and a while. I probally shouldnt've tried to move it after it locked up though. Any ideas on what went wrong???????

 

Yeah the front bearing in the transmission was making some noise just before it happened,im assuming that let out and the shaft kind of went sideways??????

 

Many years ago I had a synchro come apart in a T-14. Stopped me dead in my tracks except for the sideways slide it put me in. Scared the crap out of me.

 

Ill have the cover off before the days over. Will post pics of the carnage

 

T-90 Needs dentures

Here you go, the bearing failed and the shaft hopped around

 

Ouch!

 

Excuse my ingnorance of transmissions (have never taken one apart... yet...) but what am I looking at. I think I'm seeing teeth missing, but I'm not sure

Edit: just tring to learn a little

 

Yes you are correct those are the teeth missing off the drive gear and are free to screw up any thing else in there as they bounce around.

 

Not that familiar with the T-90... however, you are looking down into the top of the transmission. The front wall of the transmission is marked by the yellow paint spot. The gear you see with the obviously broken teeth is the end of the input shaft. There's a large bearing that supports the input shaft mounted in the front of the transmission. Looks like that bearing failed and the alignment betweent the gear teeth was lost. This caused binding of the gears and breakage.

 

couldnt've said better myself

 

Thanks, I learn something new about jeeps everyday

 

Also caused much gnashing and grinding of Aaron's teeth, I'm sure.

 

Well,so far we have 92$ in damage just for the new main shaft and bearing. Ill probally replace other small parts in there to,and i plan on replacing the clutch so thats gonna add up. Does anybody think the countershaft gear could be damaged too.??????

 

Been there, done that...

 

What's the condition of the rest of the transmission? You'll need to inspect the countershaft, but I would not be too hopefull. T-90s seem fairly easy to source - I would look for another core and use the best from both, plus some new parts.

 

Had that same thing happen to me many years ago with a SB Ford and a T90 trans, was young and dumb and trans shop gouged me for $400. Now would be a good time to consider the 3.44 to 1 first gear combo since you might need to get a cluster gear also.