DANA 18 to T-86AA??

OK,so today I was mating up my stock DANA 18 transfer case to the stock T86AA. After "tightening" the rear transmission input nut,,,,,,, it all stopped spinning. After I removed the nut, everything appears to turn freely. What is the torque specification for the rear nut? Apparently too tight is,,,,,,,, well, too tight. Thanks for any help. BTW, for reference it is nut #57 on the DANA 18 expanded view print.

 

Torque is 130-170.

 

Do you have the spacer in there?


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By spacer, do you mean the washer behind the nut? If so, yes its there. Just odd. Everything appears to turn freely in all gears until I "firmly" tighten it up. Any ideas? Am I putting too much on it? I had originally tightened it up with a 1/2" impact. Maybe too much? I'll try the torque wrench.

 

There is a spacer between the transmission output shaft and output bearing. If this is worn or missing it will bind the bearing when the output shaft nut is tightened down. The torque on the nut is to keep it from coming loose or damaging the threads. No matter how tight you tighten the nut the shaft should not bind as the gear, bearing, etc is tightened against a solid surface. Look at your diagram and you should see what I mean.
There is either something missing, out of place, worn, etc.


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Look at FSM page 243 and item #39 (bearing spacer) showing for the T-90 but I believe my T-86 had it as well.

 

Yup. That's the spacer I was referring to.

 

nickmil, you were right!!! I have the spacer behind the bearing versus in front of it. On FSM page 245, the spacer is numbered 33. So now the question is,,,,,, Can I remove the snapring holding the bearing in place, remove the bearing, and then insert the spacer without removing the transfer case from the transmission? I hate to brake the transmission from the transfer case, as it is already painted, sealed up, and bolted together. Thanks for the help to you and Walt,,,,, I would have been stumped without tearing the whole thing apart to determine why it was binding.

 

I've never tried it but I doubt it. Not sure how you'd pull on the bearing when it's inside the bearing retainer. The can be hard enough to get out when on the bench.


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No because the D-18 holds the bearing retainer up tight to the back of the tranny.