NoahSewal
Well-Known Member
my stock 8 1/4 rear in my 1974 dart swinger 318 is a 2.74 gear. what spline diff came from the factory? 27 or 29? i want to throw posi in it but im not sure what spline it is.
8 1/4 diff
- Thread starter NoahSewal
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Yours is a 27 spline.
NoahSewal
Well-Known Member
pulled off rear cover today to find 2.45 gears. im just gonna go with 8 3/4 rear instead of the carrier sizes headache
Really! Super simple job. Cheap as well.
NoahSewal
Well-Known Member
from what i understand the whole housing is unusable because the pinion is in a different spot to compensate for the smaller gear? is this not correct?
I haven’t heard that, I really don’t know.
The only one I know that would not and not be a FABO member would be Dr. Diff.
The only one I know that would not and not be a FABO member would be Dr. Diff.
That is rumored. I don’t believe it.
I think the carrier is all that's necessary to swap out. That's the first I've heard of the housing having to be swapped.
racerdan80
Well-Known Member
Somewhere in the drivetrain forum there is a lengthy thread on this. Several members did the swap with the original housing going from 2.45 to whatever they wished. Search it and read up. Just make sure you use the right gears with the right carrier
QuickDart360
Well-Known Member
Mine was a 2.45 gear. I swapped Carrier with an auburn suregrip and 3.91's. All that's needed.
That's what I thought yall. Thanks for confirming this, as I've never done and carrier swapping on the 8 1/4, so I didn't know for sure. Good info.
Well, yall need to look at this thread. There ARE two different housings. Thanks @halifaxhops !
The 8 1/4 thread
The 8 1/4 thread
Found the water huh?
LOL Sometimes it takes a minute.
superdart
Shade Tree Tinker Gnome.....
My car was a factory 2.45 gearing. I swapped in a 3.55 set of gears from a 2004 V6 Dakota and a Dana Trac-Loc from a 2001 Durango R/T (29 Splice, so I ordered a set of custom axles from Dr. Diff). Everything was perfect....been running for years.
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