tilly819
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| posted on 2/10/11 at 08:43 PM |
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Sierra diff Pinion seal change ?
Hi all
I have a leaking pinion seal on my searra dif, going to change it in the next couple of days but have nevr done one before.
i assume you take the big nut off the front of the diff then that allows you to remove the flange and gain access to the seal, is this correct??
i would like to do it without removing the diff from the car ideally. is this practical and does anyone have any tips or advice on how to do
it>?????????
many thanks
tilly
F20C Haynes roadster 440 BHP/Tonne www.youtube.com/handmadeextreme
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britishtrident
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| posted on 2/10/11 at 09:13 PM |
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Stop ! and find out more before you disturb the pre-load adjustment.
First check the diff isn't over filled -- level should be just below the filler plug level when the car is sitting absolutely level, also
check the breather is clear.
If you must change the seal then the in service procedure (bodge) is to mark the angular position of the nut on the pinion shaft and undo the nut
counting the turns exactly, remove the flange and hook out the seal. Replacement is exactly the reverse procedure it must be stressed the nut must be
screwed on exactly number of turns or the diff crushwasher will require replaced.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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tilly819
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| posted on 2/10/11 at 09:23 PM |
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thats great advice thanks, the seal needs changing for sure, thats great info about the pre load, i will mark the nut before i undo it and make sure
it goes back on with the same number of turns
tilly
F20C Haynes roadster 440 BHP/Tonne www.youtube.com/handmadeextreme
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britishtrident
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| posted on 2/10/11 at 09:23 PM |
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I found this vid on Youtube it shows how to do it
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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mcerd1
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| posted on 2/10/11 at 09:31 PM |
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here's the sierra diff manual....
http://i5.photobucket.com/albums/y170/mcerd1/page01.jpg
http://i5.photobucket.com/albums/y170/mcerd1/page02.jpg
http://i5.photobucket.com/albums/y170/mcerd1/page03.jpg
http://i5.photobucket.com/albums/y170/mcerd1/page04.jpg
http://i5.photobucket.com/albums/y170/mcerd1/page05.jpg
http://i5.photobucket.com/albums/y170/mcerd1/page06.jpg
http://i5.photobucket.com/albums/y170/mcerd1/page07.jpg
http://i5.photobucket.com/albums/y170/mcerd1/page08.jpg
http://i5.photobucket.com/albums/y170/mcerd1/page09.jpg
http://i5.photobucket.com/albums/y170/mcerd1/page10.jpg
http://i5.photobucket.com/albums/y170/mcerd1/page11.jpg
http://i5.photobucket.com/albums/y170/mcerd1/page12.jpg
http://i5.photobucket.com/albums/y170/mcerd1/page13.jpg
http://i5.photobucket.com/albums/y170/mcerd1/page14.jpg
http://i5.photobucket.com/albums/y170/mcerd1/page15.jpg
http://i5.photobucket.com/albums/y170/mcerd1/page16.jpg
[Edited on 2/10/2011 by mcerd1]
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Chippy
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| posted on 2/10/11 at 10:38 PM |
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Just to clarify, the nut holding the drive plate does not have anything to do with the pre-load. When removed you will see another nut behind the
drive plate, this is the one that is adjusted for pre-load. So just remove the drive plate fit the oil seal and then redo the nut to the correct
torque, (which escapes me at the moment). HTH Ray
Edit to add, if you look at the picture in this link you can see the nut, No6, (which is left hand thread), behing the drive plate.
http://i5.photobucket.com/albums/y170/mcerd1/page01.jpg
[Edited on 2-10-11 by Chippy]
[Edited on 2-10-11 by Chippy]
To make a car go faster, just add lightness. Colin Chapman - OR - fit a bigger engine. Chippy
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Dusty
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| posted on 2/10/11 at 11:19 PM |
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I thought my diff had a leaking pinion seal due to the diff oil smothering the nose. Carefull investigation showed the oil was leaking between the
splines of the prop flange and the pinion and not the seal which seals round the outside of the prop flange. I couldn't work out how this was
intended to be made oil tight.
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bigbravedave
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| posted on 3/10/11 at 07:01 AM |
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mine was leaking, but also from the flange not the seal, a tiny smear of sealant on the flange did the job.
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