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Old 03-21-2011, 02:39 PM   #1 (permalink)
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Dana 18 input gear location....

What sets the depth (front to back ) of the input gear on a Dana 18? Does it locate against a shoulder on the transmission output shaft?

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Old 03-21-2011, 04:32 PM   #2 (permalink)
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Yes, and tighten it as tight as you can get it with a breaker bar. I use my feet!
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Old 03-21-2011, 07:32 PM   #3 (permalink)
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Yes, but what does the gear locate against? The output bearing on the back of the transmission or some kind of step on the output shaft?

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Old 03-29-2011, 09:36 AM   #4 (permalink)
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The t-90 (which bolts up to the dana 18) does not have a shoulder or locating device on the shaft. The input gear locates off of the transmission output bearing. Also you might check the torque spec for the castle nut that holds the input gear in place. Im not sure but over torquing may cause damage to your bearing. The castle nut in the dana 18s I've taken apart have been finger tight. Im not saying its right but just saying.
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Old 03-29-2011, 10:20 AM   #5 (permalink)
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Quote:
Originally Posted by FrankenCJ View Post
The t-90 (which bolts up to the dana 18) does not have a shoulder or locating device on the shaft. The input gear locates off of the transmission output bearing. Also you might check the torque spec for the castle nut that holds the input gear in place. Im not sure but over torquing may cause damage to your bearing. The castle nut in the dana 18s I've taken apart have been finger tight. Im not saying its right but just saying.
Yep, make sure that nut is torqued correctly. I had the gear walk off the shaft in Moab when the nut decided it wasn't happy being part of the team anymore. The nice thing about the 18 in this situation is the ease of access with the lower and rear covers. I had to pull the lower to fish out the nut and the rear cover to put it all back together. They run surprisingly well on motor oil.
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