904 Teardown

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j.mcconnell

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Joined
Nov 29, 2010
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Location
Raleigh, NC
m diving into my first 904 rebuild and have hit a problem. I have the case completely stripped except for the low/reverse drum and output shaft. I pulled the pump and all input shaft pieces. Rear planetary is out. Band and the bracket is out. There was a decent size snap ring inside the low drum, on the inside part of the output support. I removed that snap ring and thought the drum should have just slid off the rear support and out, but it won’t. It will rotate one direction and move in/out about 1/8”, enough to cover the snap ring grove, but not come out.

This is a 4x4 904. The tail housing, governor, and parking pawl are off. As it sits the output shaft will not rotate or pull out the back of the case. I assume it should rotate and everything I’ve seen makes me believe the shaft could just pull out.

Thanks in advance.
 
The drum should easily turn in one direction. The output shaft should slide right out. This may have been towed. Hammertime.
 
This is out of a 01 Jeep that “went into limp mode”. I found a broken/collapsed accumulator that was probably the original problem, but it was left outside after being replaced. Other drums have surface rust but this one is clean. PB blaster overnight and a couple kisses from a brass drift hasn’t gained me anything.

Sound like it need to increase the percussive maintenance.
 
m diving into my first 904 rebuild and have hit a problem. I have the case completely stripped except for the low/reverse drum and output shaft. I pulled the pump and all input shaft pieces. Rear planetary is out. Band and the bracket is out. There was a decent size snap ring inside the low drum, on the inside part of the output support. I removed that snap ring and thought the drum should have just slid off the rear support and out, but it won’t. It will rotate one direction and move in/out about 1/8”, enough to cover the snap ring grove, but not come out.

This is a 4x4 904. The tail housing, governor, and parking pawl are off. As it sits the output shaft will not rotate or pull out the back of the case. I assume it should rotate and everything I’ve seen makes me believe the shaft could just pull out.

Thanks in advance.
In the tail section there is the parking latch & gear that will hold the output too. Should a YouTube on it.
 
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