Search found 11 matches

by BigBlockMan
Thu Nov 26, 2009 1:09 am
Forum: General Differential Questions
Topic: Need help with a richmond ring & pinion...
Replies: 7
Views: 3054

Re: Need help with a richmond ring & pinion...

Actually yes and no...outside yes across the teeth, on the inside I measure where it meets the carrier..With the large outside diameter I'm thinking either 9.375 Olds or a 3/4 Ton pickup...If it's even GM..There is a possibility of a Dana, Chrysler, or Ford...all had rings around that size..best thi...
by BigBlockMan
Wed Nov 25, 2009 4:04 pm
Forum: General Differential Questions
Topic: Need help with a richmond ring & pinion...
Replies: 7
Views: 3054

Re: Need help with a richmond ring & pinion...

What is the outside and inside diameter of the ring? 74 Olds could have had 2 different 12 bolt rings, if that is what it is for...either 9.375 or 8.875...8.875 had 30 spliner pinion so I'm, guessing the 9.375 but I didn't think anybody made aftermarket gears for those. If they are for the 9.375 I'd...
by BigBlockMan
Sat Nov 14, 2009 10:18 pm
Forum: 10 Bolt Differential Questions
Topic: 8.5/8.625 Series run questions
Replies: 7
Views: 2035

Re: 8.5/8.625 Series run questions

Yeah I don't think .040 would hurt too bad...better than the .110 that I would have to open up an older 8.5". I suppose I wouldn't even have to go that far as the 31 spline axles are only 1.315..so maybe .020 or so.. I will have to ponder on that newer carrier thing...we have no such thing as a...
by BigBlockMan
Sat Nov 14, 2009 10:00 pm
Forum: 12 Bolt Differential Questions
Topic: 12 Bolt carrier ID.
Replies: 3
Views: 2954

Re: 12 Bolt carrier ID.

The flange height was the same as the 72 10/12 I have at 1.980 from the end of the bearing hub...Looks to be identical to the 72 version as far as dimensions go...smaller spider shaft and larger/longer pin bolt. Here is a bit of interesting info for ya..the guy O got this carrier from said he had it...
by BigBlockMan
Thu Nov 12, 2009 7:58 pm
Forum: 10 Bolt Differential Questions
Topic: 8.5/8.625 Series run questions
Replies: 7
Views: 2035

Re: 8.5/8.625 Series run questions

Jim,

Numbers when you get a chance would be perfect.

Just out of sheer curiosity how much is a new open carrier? I'm sure it is out of range for what I want to do but.... Do you ever get any in used?

Thanks again,

Chris Vaughn
by BigBlockMan
Thu Nov 12, 2009 7:55 pm
Forum: 12 Bolt Differential Questions
Topic: 12 Bolt carrier ID.
Replies: 3
Views: 2954

12 Bolt carrier ID.

I am pretty sure this is for a 65-70 Pontiac 10/12 but... Casting number ED30153 (153 only on Ring side) Other casting marks..."ARMA STEEL" Ring stamped 41-15 GM 1 70CY (no pinion but 41-15 = 2.73) 12 7/16 Bolts (haven't check but I assume LH thread) Spider gear (differential pinion whatev...
by BigBlockMan
Wed Nov 11, 2009 5:19 pm
Forum: 10 Bolt Differential Questions
Topic: 8.5/8.625 Series run questions
Replies: 7
Views: 2035

Re: 8.5/8.625 Series run questions

Jim you nailed most of it...now I just need some numbers...What I'm trying to do it build a frankentube... I want to use a 8.5" ring and pinion (due to ease of finding gears) with a 31 spline axle from the odd ball Olds/Pontiac stuff I have. I'm not too worried about the internal gears fitting ...
by BigBlockMan
Tue Nov 10, 2009 3:00 pm
Forum: 10 Bolt Differential Questions
Topic: 8.5/8.625 Series run questions
Replies: 7
Views: 2035

8.5/8.625 Series run questions

Let me start with what I think I know... Only 2 carriers, 2.56 and down and 2.73 up? From 71-89 all 8.5' used the same 28 spline axles (some bolt in some C-cliped) 90 to 00 had 30 spline axles with the same carrier bearings as 71-89 (all c-clip) 00 to current had 30 spline axles with bigger carrier ...
by BigBlockMan
Tue Oct 20, 2009 10:51 pm
Forum: 12 Bolt Differential Questions
Topic: 1970' Oldsmobile full size 12 bolt
Replies: 5
Views: 5217

Re: 1970' Oldsmobile full size 12 bolt

Did some tear down today on what I thought was a 8.875 Corp...here is what I found: Carrier Bearings LM603049/LM603012 Outer Pinion M88048/M88010 Inner Pinion M804049/M804010 Carrier casting 250 (2.73 ratio, eaton style posi) Housing casting 480633 (From a 72 Chevy wagon) Axle code 7D P293 (7 may be...
by BigBlockMan
Tue Oct 13, 2009 12:07 pm
Forum: 12 Bolt Differential Questions
Topic: 1970' Oldsmobile full size 12 bolt
Replies: 5
Views: 5217

Re: 1970' Oldsmobile full size 12 bolt

I think your correct about the 3.42 being as steep as they got from the factory. I need to open up a couple of the other rears I have and see what they are. I may have hatched another plan however. A little back ground on the project may even help you understand why I am attached to these odd ball r...
by BigBlockMan
Thu Sep 24, 2009 7:56 pm
Forum: 12 Bolt Differential Questions
Topic: 1970' Oldsmobile full size 12 bolt
Replies: 5
Views: 5217

1970' Oldsmobile full size 12 bolt

I have a Oldsmobile 12 bolt rearend (actually i have 3) 1 is from a 70 Delta, 1 in a 72 Delta, and 1 in a 73 Wagon. This is not the 10 bolt ring version both cover and ring have 12 bolts. Housing casting number is 383300, carrier is a casting of 698. Also on the carrier is a "GG" a "3...

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