Pirate 4x4 banner

1 - 20 of 25 Posts

·
Registered
Joined
·
22 Posts
Discussion Starter #1
Hello, new to the site as a whole and also hoping to get some insight from some of those experienced in setting up differentials.

I am currently part way into my first locker install into a ford 8.8.
I have so far fitted everything and adjusted to the point which my backlash is within spec, and I have made several adjustments to pinion depth the attain a pattern as follows.

I however am having difficulty in deciding what changes are required or if this would be considered an acceptable pattern. Any info or suggestions would be greatly appreciated.


 

·
Registered
Joined
·
22 Posts
Discussion Starter #2
Apparently I cannot post pictures yet? however if anyone is willing to offer some advice I will happily pm the pics.
 

·
Registered
Joined
·
22 Posts
Discussion Starter #4
They were hosted on photobucket, so I am assuming there may be a post count required to post pictures?
 

·
Registered
Joined
·
4,465 Posts
No post count is required for hosting on another site.
 

·
Registered
Joined
·
3,728 Posts
From what I see, I would just run them. Not perfect but pretty good.
 

·
Registered
Joined
·
22 Posts
Discussion Starter #8
the part that confuses me is the wear line closest to the top of the tooth seems fairly prominent, and not feathered, but the pattern does extend towards the root with slightly less contact.

Adjusting pinion depth to bring it in by .003 brought the pattern more prominent towards the root.
 

·
Registered
Joined
·
27,625 Posts
Run it, you could play with a thou or two here and there but that pattern is acceptable. What is the backlash at in those pics?
 

·
Registered
Joined
·
22 Posts
Discussion Starter #10
I would have to check my paper at the shop, but I believe it was left off at 0.012

Now, this was done without any carrier preload.
However as long as I properly preload by increasing both sides equally, I should maintain a very similar pattern correct?
 

·
Registered
Joined
·
22 Posts
Discussion Starter #12
Ox locker.
.008 is apparently the tightest recommended backlash for this axle but had so far stayed away from the lower end as I have been reading that tight tolerances had the tendency to whine in the 8.8. Is that actually a problem or just a matter of coincidence?
 

·
Registered
Joined
·
27,625 Posts
Never run an 8.8 personally, but have setup many diff's. .012 is on the loose end, IMO. With all new bearings and gears, that initial .008 will open up into the .010 range after break-in.
 

·
Registered
Joined
·
22 Posts
Discussion Starter #14
Makes sense, will it make any difference that the gearset I am using is in fact used? It is the existing gears from the axle I purchased to do my swap.

I will try bringing the backlash down tomorrow and check the pattern again if not simply to see what it can do to the pattern
 

·
Registered
Joined
·
4,465 Posts
Shoulda mentioned that they were used from the get go.

They won't open up as much, but it still will open up some (0.001 or so). Getting a good pattern on a used gearset is difficult, so once you get the backlash tighter check the pattern again. If it's anything like the above pictures just run it.
 

·
Registered
Joined
·
27,625 Posts
Shoulda mentioned that they were used from the get go.

They won't open up as much, but it still will open up some (0.001 or so). Getting a good pattern on a used gearset is difficult, so once you get the backlash tighter check the pattern again. If it's anything like the above pictures just run it.
Pretty much. On used gears I run a pattern before, check the backlash and do my best to match after. You can also usually see where the gears have been running, just by looking at the face.
 

·
Registered
Joined
·
22 Posts
Discussion Starter #17
so I played around with it a bit again today, got some better carrier preload.
and managed to bring the preload down to .008
this is what I have now.
not sure if it is worth centering by increasing pinion depth and correcting for the same backlash, due to the coast side taking up most of the face.



 

·
Registered
Joined
·
22 Posts
Discussion Starter #18
one more time, wasnt quite satisfied with the last patten, so i dropped the pinion depth from .030 to .026 and brought the backlash in to maintain .008





I think this is about as good as I can get it.
unless anyone thinks I should be concerned with the contact pattern reaching the toe, however the contact seems to cover most of the surface.
 
1 - 20 of 25 Posts
Top