2nd Gen Non-Engine/Transmission dana 80 Question

[cowboy up]

Do i need a new crush collar if i replace the pinion seal

 

[HoleshotHolset]

I have changed quite a few yokes and/or seals without changing the crush collar... . or whatever it's called.



Most of this was on D60/70 stuff... . no D80 stuff under my belt... yet.



Matt

 

[NScott]

You don't need another crush spacer to replace just the pinion seal if you will take a small sharp chisel and index the pinion nut to the threads on the pinion shaft BEFORE you loosen the nut. (Make a small line on the edge of the nut and extend it onto the threads just a bit)The nut needs to be retightened to the exact location it was before disassembly to replace the old seal.









99 3500 C&C 5Spd 24 V 26K miles fueling box&4" straight exhaust

98 3500 C&C 5Spd 12 V (this one has some engine problems)

97 3500 C&C 5Spd stock

96 3500 C&C 5Spd stock

96 3500 C&C Auto stock

95 2500 modified into a C&C with 3500 rearend 5Spd stock

 

[Roger rodbolt]

cowboy up,



The Dana 80 doesn't use a crush sleeve. The service manual has a procedure to measure the turning resistance before and after a seal replacement. Putting the nut back EXACTLY as it was will probably work for you. Larry

 

[Extreme1]

No crush sleeves on the Dana 80. The torque is 450 ft-lbs and you do need a puller to remove the flange.



I marked mine on removal and reinstalled it with a large impact (a friend of mine owns a 5 bay repair business) and let it hammer for a while to get it tightened back up to where it was. I actually went a tick past where it was to make sure the torque was where it neede to be. That was 1 1/2 years ago.



HOWEVER, many times the seal is leaking because the pinion bearings are loose. Check for clearance with a dial indicator before you disassemble.

 

[scramblin]

Originally posted by Extreme1





HOWEVER, many times the seal is leaking because the pinion bearings are loose. Check for clearance with a dial indicator before you disassemble.

They will also leak if you get string or hair or something similar between the seal and the yolk.