t 90 transmission

Ok guys school me a little here. I am tearing down the t90 that Stout gave me. the case has the typical t90 a1 on the side

Now when I was pulling the front input off of it I noticed this

It has the longer input on it as well.


I really just needed the case to rebuild my t 90 but is this a t 86 or just hangover from older parts?
And what do I look for to see if the parts inside is t 90 or t86?
And here is why they pulled the tranny

What would cause this kinda damage

 

It's a T-90. The splines of a T-86 main shaft spiral, and the teeth on the T-86 1st and reverse are beveled. Straight splines and straight teeth is T-90.

Input shaft looks long - maybe it's the T-90J input with a T-86 bearing retainer?

 

Thanks Tim, I was wondering because the gears and lower cluster looked allot like the t 90c and the second gear was the same. the input is way longer than the one from the 4cyl input. So I'm guessing what you said is right. the t86 markings just threw me off.

thanks!

 

Pretty common to see T-86 input retainer and that will be the T-90J input shaft and as Tim said, all else in there is T-90. That blocking ring sure looks sad. Never seen one chewed that bad on a working tranny. Have no clew.

 

I messed around with it before I tore it down and it wouldn't go into 3rd gear. I have seen blocking rings with the teeth chewed off but never seen one like this before either. It would be really cool if these old things could tell their story of what happened.

 

Usually caused by the input and pilot bearings being bad. I have seen them chewed up like that also when the 2-3 synchronizer inserts broke allowing the blocking ring to spin around inside the synchronizer assembly. The inserts breaking is common on T-90's.


Sent from my iPhone

 

I would guess the retaining pin from the shifter fell inside it. That or another piece of metal of similar shape. Just a guess but I had one do something also the same thing once upon a time

 

I noticed the difference in the one that was in the tranny and the one you sold me Warlock, the t90c cluster is probably 1/4" larger than the one in this tranny.

 

I have one more question. I was cleaning up some of the parts today, one of our members is interested in the input and retainer, From where the blocking ring got tore up there is brass on the input.

My question is can the brass be removed without messing up the back of the input? or is the input trash at this point?

 

Just out of curiosity, what does the inside race of the input look like? Like Howard, I wouldn't be using that.

 

You have a wire brush in a bench grinder? It attack a part of the stuck-on bronze (maybe brass) with that and see what the steel underneath looks like.

 

Inside the race looks decent. I think what happened to this was, When I took it apart, I noticed there was a bearing laying flat in the in the front of the race. I think that's what started all the damage.

I did just this and the bronze will not come off, and it's pitted, It's a shame that the input is junk.

Thank you guys for the comments. Appreciate it!!

 

Done, thanks Warloch