Checking rear axle straightness???
04-08-2015, 12:24 PM
#1
Guest
Posts: n/a
Checking rear axle straightness???
Just got wind of a method of checking to see if a rear axle is bent (full floater 80/70).
They have a Dana 80 with the hubs still on it. They have removed the carrier and gears.
Bolted an axle to the hub and one guy is spinning the hub by hand, while another guy is under the truck watching the splines go round and round.
If the axle splines wobble, it's bent.
My initial thought was...That's just crazy.
But, it "almost" makes too much sense.
I'd like to tell them why that won't work, and to use a lathe...but, I can't seem to come up with a solid reason.
Anybody? (and it's not the weight of the axle)
They have a Dana 80 with the hubs still on it. They have removed the carrier and gears.
Bolted an axle to the hub and one guy is spinning the hub by hand, while another guy is under the truck watching the splines go round and round.
If the axle splines wobble, it's bent.
My initial thought was...That's just crazy.
But, it "almost" makes too much sense.
I'd like to tell them why that won't work, and to use a lathe...but, I can't seem to come up with a solid reason.
Anybody? (and it's not the weight of the axle)
06-06-2015, 09:53 PM
#2
Registered User
I'd guess that is possible. Its only straight in one spot, any bend would show double by wobbling the shaft at the other end I'm thinking
06-07-2015, 06:26 AM
#3
Cummins Guru
We have been checking for bent axle using our alignment machine, but if axle is not bolted to truck spinning hub should work for a quick check. We recently changed front axle because we were unable to get alignment into spec. New truck under warranty.
06-07-2015, 03:37 PM
#4
Registered User
That would work for the axle shaft, but not the housing. If the shaft is bent, it will wobble. The housing can be bent without any wobble.
Providing there is not excessive play in the wheel bearings, the hub just takes the place of your lathe.
Providing there is not excessive play in the wheel bearings, the hub just takes the place of your lathe.
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