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Sierra diff rebuilding
iwbunting - 19/10/04 at 09:44 PM

Does anyone have any information on rebuilding a sierra differential.

I want to have my casing stove enamelled but cant find the info i need to rebuild it afterwards.

JohnN - 19/10/04 at 09:54 PM

Ian,

I understand that the pre-load on the diff pinion shaft is a critical setting when re-building.

Seem to remember from english axle days that there may be a washer which crushes at the right pre-load, then again, maybe not. if you get it wrong, at best the axle will whine, at worst, wear out very quickly.

I'm guessing that a very old haynes manual might explain the re-build procedure & settings, whereas recent manuals (1990 onward...) are printed on crappy paper and are apt to describe most tasks as too complex for Mr Average.

John

nick205 - 19/10/04 at 10:06 PM

I think the general opinion on here has been that if it 'needs' re-building it's easier and cheaper to get another one rather than try re-building it.

Nick

James - 19/10/04 at 10:45 PM

quote:
Originally posted by iwbunting
I want to have my casing stove enamelled but cant find the info i need to rebuild it afterwards.


Is it expensive to do?

Just wondering what you'll gain from having it done?

If you just want it to look nice then a quick shot blast to clean it up followed by paint seems to work ok:

Is that better?
Is that better?

All the best,

James

Stu16v - 20/10/04 at 05:45 PM

quote:

I want to have my casing stove enamelled


Seems a lot of hassle to go to, when the only person that is likely to see it on a regular basis is the MOT man once a year...

iwbunting - 20/10/04 at 09:17 PM

Yeah ok.I get the point.....Just clean and paint...What the hell...Thanks anyhow.

James - 21/10/04 at 10:40 AM

quote:
Originally posted by Stu16v
<snip>when the only person that is likely to see it on a regular basis is the MOT man once a year...


And, of course, anyone you care to run over!

James

Stu16v - 21/10/04 at 06:16 PM

quote:

And, of course, anyone you care to run over!


What, on a regular basis?

Iwbunting...dunno if I have may of offended (difficult to tell on t'internet...). If so, sorry...

I spent hours degresing and wire brushing my diff-and giving it a loverly coat of paint. Only to find out that it whined more than the Mrs. So I got another one out of the scrappy, washed it, and slapped it in. No more noise, and my car looks just the same now as it did before. The point I an feebly trying to make is that there is a shedload of work making your own car-but the time and cost in stove enamelling etc is better spent on bits where you/other people will really appreciate it.

Just thoughts/advice from the wearer of the 'Been there-done that' T-shirt...

[Edited on 21/10/04 by Stu16v]

Terrapin_racing - 22/10/04 at 01:21 PM

........... All diffs use a crush washer to set clearances removing and refitting oil seals can be troublesome. Start with your torque wrench on a low setting and keep upping slightly until you can check the setting at which it comes undone. Add 5 lbs to this to retighten.