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identifying a 9.25 sg unit

Posted By: cudazappa

identifying a 9.25 sg unit - 02/07/10 09:06 PM

Ok, I have a 9.25 SG unit laying around, an ebay special. anyways, I bought it under the false assumption that all 9.25 rears were the same, not knowing that there was a big change over in 84/85.

is there anyway to tell what the unit is for by measuring, casting #s or ???

thanks in advance for any help....
Posted By: Commando1

Re: identifying a 9.25 sg unit - 02/08/10 12:12 PM

Quote:

...there was a big change over in 84/85.



That's news to me. Where did you get that info?
Posted By: buildanother

Re: identifying a 9.25 sg unit - 02/08/10 01:15 PM

I tried putting an early 9 1/4 anti-spin case in an 85 9 1/4, and IIRC, the axle slid into side gear fine, but the 85 C clip outer diameter would not drop into recess of side gear. I believe the axle shaft button also was dofferent in thickness. I do not know when actual change was made yearwise.
Posted By: Crizila

Re: identifying a 9.25 sg unit - 02/08/10 01:32 PM

Quote:

I tried putting an early 9 1/4 anti-spin case in an 85 9 1/4, and IIRC, the axle slid into side gear fine, but the 85 C clip outer diameter would not drop into recess of side gear. I believe the axle shaft button also was dofferent in thickness. I do not know when actual change was made yearwise.


I've heard that before, but don't have any info on it. Wonder if you just gotta keep the early axles with the early center sections? Also curious if it has anything to do with the cone clutch set up verses the disc type clutchs?
Posted By: cudazappa

Re: identifying a 9.25 sg unit - 02/08/10 08:52 PM

bump for the afternoon crew?
Posted By: Commando1

Re: identifying a 9.25 sg unit - 02/09/10 03:45 PM

OK. That all makes sense. I questioned it because I have swapped late ring & pinions into earlier 9 1/4's.
Posted By: buildanother

Re: identifying a 9.25 sg unit - 02/09/10 04:08 PM

In my case, I ended up selling the no-fit antispin to a freind 10 years later, and installed it too in his lil red truck. Fit perfect.
Posted By: Venomvpr900

Re: identifying a 9.25 sg unit - 02/09/10 04:56 PM

I modified the c-clips to fit. Just took some off the outside diameter on the new clips. Have not had any troubles with it behind 400hp 360.
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