Dillinger1977
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| posted on 8/6/05 at 09:31 AM |
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sierra diff rear mount
Hi chaps
How much is safe to remove from the rear mount sticking out of a standard sierra diff?
I need to cut as much of it off without creating a hole ;
when i had the back plate off i noticed it was hollowed out slightly between the 2 threaded holes, unfortunately I didnt measure how far back the
hollow went. doh!
i wish i'd waited till it was in the car before i put the back plate on! (although that would have made removal impossible later on!)
any ideas?
-Rog
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smart51
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| posted on 8/6/05 at 11:04 AM |
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use a depth gauge (stick) to measure the depth of the rear mounting holes. You can safely cut this much above the top hole and below the bottom hole.
I don't know about in between.
cut from the top down, from front to rear at about 45° from where the rear mounting lug meets the rest of the back plate.
Remove the rest of the material little by little unil you can just fit the diff into the car.
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Dillinger1977
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| posted on 8/6/05 at 11:31 AM |
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like this?
or cut even further towards the bolt heads?
[Edited on 8/6/05 by Dillinger1977]
-Rog
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ned
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| posted on 8/6/05 at 11:39 AM |
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yup, be careful i tried this and cut a hole in mine 
beware, I've got yellow skin
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Snuggs
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| posted on 8/6/05 at 12:51 PM |
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I cut across the green line and it was OK.
 
Rescued attachment diffplate.JPG
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Dillinger1977
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| posted on 8/6/05 at 12:59 PM |
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to be honest, looking at it again i dont think theres a hope in hell of me fitting this complete, even with parts sawn off.
i think im going to have to take the whole backplate off, fit the dif (theres room to swing it in with that removed), and then fit the backplate once
its in. shouldnt make much difference really.
i'd have to take the backplate off if i need to remove the diff later, but thats not the end of the world 
-Rog
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smart51
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| posted on 8/6/05 at 01:05 PM |
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move the red line forwards a bit so that it it closer to the torx bolts, otherwise the diff won't clear the lower circular tube.
To get a more pricise line for the cut, offer up your diff to the chassis, nose first, as far as it will go. Mark the diff where the chassis tube
touches the diff rear mounting.
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Dillinger1977
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| posted on 8/6/05 at 02:47 PM |
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thats the wierd thing, ive got the nose bit in touching the handbrake cable mounts, and i cant get it any further forward as the casing around the
halfshaft area hits the actual mounting bracket on the chassis.
but the mounting bracket is still a good few inches behind the lower chassis bar.. no amount of sawing will get that in.
i think the backplate's going to have to come off. easiest way i think
-Rog
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smart51
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| posted on 8/6/05 at 02:54 PM |
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You should be able to get the nose in under the handbrake cable mounts. If you remove the back plate then it will fit in no problems. You just have
to be able to loosen all the bolts and be willing to replace the oil.
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Dillinger1977
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| posted on 8/6/05 at 03:25 PM |
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if anyones interested, heres the dimensions (the inner hollow is a bit rough in shape but the depth should be right)
-Rog
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