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I was under the HR today trying to establish where the diff leak was coming from as its making a bit of a mess at the moment.
Seems that the leak is coming through the gasket between the carrier housing and axle casing. Ok, so until I have time to fix it properly, I tried to tighten the nuts holding the carrier casing to try and subdue the leak a little.
On the second nut I tightened, it seems to be threaded or the stud was spinning in the axle casing as I could not tighten the nut. Hence, my leak.
Without having pulled the diff out before, I assume that there are threaded studs in the axle casing and then the carrier housing simply slides over them? If the stud is threaded or spinning (is this possible?) is it easily fixed? I don't really want to remove the etire axle casing for a replacement one.
Thanks,
Geoff
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that stud your referring to shouldnt spin - have a look a your backing plate of the brake drum and you will see little half circle headed studs. if one of these heads is broken it will spin.
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So if the thread is damaged or indeed is spinning in the housing what are my options?
If I removed the diff carrier housing could I remove the studs from theh housing and re-tap a slightly larger diameter and insert new studs? Could this be done whilst the housing is still on the car?
This would obviously require re-drilling the carrier housing to allow for slightly larger studs.
Thanks.
GT
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Do you mean the diff centre bolts or the axle bolts ?
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the studs that are attached to the diff housing like below:  Thinking about it more, I suspect that the studs are probably ok and that the thread is stripped hence the nuts is just spinning on the thread. I guess I could re-thread the studs with a slighter smaller gauge and get some new nuts. thoughts?
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isnt the empty hole down the bottom for a bolt?
this bolt also doubles as a sump plug
if its a stripped thread then a proper fix is to drill it out and re-tap and fit a helicoil
or because its a steel casing, you could weld the hole up and re-drill and re-tap the hole the original size
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As davequey74 stated above , helicoil it thats the best way out !! But as you have it apart now , I personally would check all the studs and nuts and replace em all , these diffs have been in & out due to weakness that many times its not funny , leave it up to you.
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Thanks for the input. New studs it is!
Geoff
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Did you confirm where the actual oil was leaking from? When subjected to a bit of horsepower, or rough treatment, they can crack. A crack can form along the bottom of the join where the bolt up face for the center meets the housing. In the image you posted, it is the area just out of shot at the bottom. To test it for cracks, clean the housing thoroughly inside & out around this area. Sit it on a bench, & if possible, plug the hole that is missing the bolt so that you can pour an amount of fluid into the bottom of the diff housing. Then, simply pour some prepsol inside the diff housing to make a pool. Carefully look around the area at the bottom of the diff, particularly where the bottom edge of the gasket sits. If the fluid seeps out, that will be contributing to your oil leak issue. Fix it by replacing the housing or welding along this lower edge where the crack is. Vee it first. Utility8  |
utility8
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Looking at the bolt on the right youve got threading issues and the bottom hole needs something in it ,if you plan to keep the car i would be looking for another drum to drum set up anyway before you cant buy them cheap or cant buy them at all!..this would be a good time to select you final drive ratio too!..just my thoughts....jim Jim in Adelaide...Hindsight is bad vision! Edited by user Sunday, 14 March 2010 9:31:47 PM(UTC)
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Jim in Adelaide.. |
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