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Diff identification
jos - 28/3/09 at 07:28 PM

How do I tell

1) whether ive got a 7 or a 7.5" diff (Sierra)

2) Whether there is excess wear/play in my existing and or possible new diff??

omega0684 - 28/3/09 at 07:41 PM

quote:
Originally posted by mads
the front top part of the diff where the bolt goes through should be a quick identifier. If there is a gap i.e. you can see the bolt in the middle then its a 7". if it's solid then more likely to be a 7.5" (someone correct me if i'm wrong).


not sure about the gap bit but if you measure across it, it will either be 7 or 7.5", obviously identifying which one it is.

as for wear and tear the best way in my eyes is to take it apart and have a look at the internals, does it have a load wine or make funny noises when in action?

[Edited on 28/3/09 by omega0684]

jos - 28/3/09 at 07:58 PM

No noises and no alchoholic excess

The symptoms are that its difficult to push out of the garage. I think Im 99% sure its not brakes binding as ive jacked up the backend removed the wheels taken off both drums and theres no difference in the force needed to rotate the drive shafts. Ive also ruled out too much toe in on the rear keading me to think that its either a worn diff or worn wheel bearings.

I might just do them both at the same time. How would you tell if a replacement diff (2nd hand) has "load wine" or funny noises without installing it??

Steve Hignett - 28/3/09 at 11:01 PM

Only way I know of if there really is a load wine...





quote:
Originally posted by jos
How would you tell if a replacement diff (2nd hand) has "load wine" or funny noises without installing it??