I had been hearing unpleasant clangs and bangs from the back of my 1949 2R5 truck for some time. I did not hear them continuously, so I was not able to fully locate the source. This truck needs pans under the full length of its drive train to keep oil off the floor of my garage. The last time I took the truck out I found the pan under the differential noticeably fuller than normal, so I ended my plan for a drive and put the truck back inside.
I took the differential cover off and found the remains of one of the bolts that hold the large gear in place laying in the bottom of the case. Rotating that gear showed that 2 bolts are missing. The second bolt is not in the case. Because it will easily fit the drain plug I make the guess that it came out during some earlier oil change without me noticing. All of the remaining bolts are loose and held in place only by the locking clips. The two clips that lost a bolt are mangled. The loss of oil came from a hole having been punched into the cover. Thanks to our vendor list, new parts are ordered. The gears look good, and I can get the cover welded up.
The repair manual shows 40 ft-lb for these bolts. This is not a lot, but the bolts are finger loose now. I make the guess that something was done to this differential, and tightening these bolts was forgotten. Does anyone have an opinion on this?
The photos show the mangled clips, the remains of the bolt and a little bit of orange to highlight the hole in the cover. The hole is barely visible here, but the oil knows where it is.
I took the differential cover off and found the remains of one of the bolts that hold the large gear in place laying in the bottom of the case. Rotating that gear showed that 2 bolts are missing. The second bolt is not in the case. Because it will easily fit the drain plug I make the guess that it came out during some earlier oil change without me noticing. All of the remaining bolts are loose and held in place only by the locking clips. The two clips that lost a bolt are mangled. The loss of oil came from a hole having been punched into the cover. Thanks to our vendor list, new parts are ordered. The gears look good, and I can get the cover welded up.
The repair manual shows 40 ft-lb for these bolts. This is not a lot, but the bolts are finger loose now. I make the guess that something was done to this differential, and tightening these bolts was forgotten. Does anyone have an opinion on this?
The photos show the mangled clips, the remains of the bolt and a little bit of orange to highlight the hole in the cover. The hole is barely visible here, but the oil knows where it is.
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