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A-Body 8 3/4
https://www.slantsix.org/forum/viewtopic.php?t=3364
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Author:  63GT [ Sun Mar 17, 2002 3:38 pm ]
Post subject:  A-Body 8 3/4

Good score or what? I just picked up an 8 3/4 housing,two sets of small bolt axles,open 741 center,new in box Detroit Locker#187sl-14a,new in box Precision gear 4.10 gear set and a complete 8 1/4 open rear assembly out of 72 Demon. all for 550.00. My question is,will the Precision gearset#C8-410fine fit the 741 case?
Thanks,Drew

MoparBrat63@aol.com

Author:  Doc. [ Mon Mar 18, 2002 10:30 am ]
Post subject:  Re: A-Body 8 3/4

Quote:
: Good score or what? I just picked up an 8 3/4
: housing,two sets of small bolt axles,open
: 741 center,new in box Detroit
: Locker#187sl-14a,new in box Precision gear
: 4.10 gear set and a complete 8 1/4 open rear
: assembly out of 72 Demon. all for 550.00. My
: question is,will the Precision
: gearset#C8-410fine fit the 741 case?
: Thanks,Drew


Good score,
Measure the pinion stem size and that will tell us what it will fit. The 741 housing takes a 1 3/8 pinion stem, the 742 takes a larger 1 3/4 stem, if it has a taper to the stem with the large section @ 1 7/8, it is for the 489 case.
DD

Author:  63GT [ Mon Mar 18, 2002 4:57 pm ]
Post subject:  Re: A-Body 8 3/4

Quote:
: Good score,
: Measure the pinion stem size and that will tell
: us what it will fit. The 741 housing takes a
: 1 3/8 pinion stem, the 742 takes a larger 1
: 3/4 stem, if it has a taper to the stem with
: the large section @ 1 7/8, it is for the 489
: case.
: DD

Thanks Doc,Well..It's the tapered stem with the large end being 1 7/8 so I'll have to either find a 489 case or buy a new set of gears.Bummer!But I will have to wait a litte while for this is a budget build-up and I just bought one of those ebay cams from koller dodge.
Thanks,Drew 63GT

MoparBrat63@aol.com

Author:  Doc. [ Tue Mar 19, 2002 4:40 pm ]
Post subject:  Re: A-Body 8 3/4 "pumpkin"

Quote:
: Thanks Doc,Well..It's the tapered stem with the
: large end being 1 7/8 so I'll have to either
: find a 489 case or buy a new set of
: gears.Bummer!But I will have to wait a litte
: while for this is a budget build-up and I
: just bought one of those ebay cams from
: koller dodge.


Good thing is that the 489 case is the "later unit and still pretty easy to find "cheap". I can grab a center section out of a junk yard for appx $35.00 and sometimes less at swap meets.

In the past I have had the "crush sleeve" tapered pinion 489 units loose pinion bearing pre-load if really "beat-on", like with a big block or 4-speed but these days the rear-end suppliers have a crush sleeve eliminater spacer, this allows the 489 case to be set-up with shims, just like a 742 unit, this makes for a super strong center section.
DD

Author:  63GT [ Wed Mar 20, 2002 3:28 am ]
Post subject:  Re: A-Body 8 3/4 "pumpkin"

Quote:
: Good thing is that the 489 case is the
: "later unit and still pretty easy to
: find "cheap". I can grab a center
: section out of a junk yard for appx $35.00
: and sometimes less at swap meets.
:
: In the past I have had the "crush
: sleeve" tapered pinion 489 units loose
: pinion bearing pre-load if really
: "beat-on", like with a big block
: or 4-speed but these days the rear-end
: suppliers have a crush sleeve eliminater
: spacer, this allows the 489 case to be
: set-up with shims, just like a 742 unit,
: this makes for a super strong center
: section.
: DD

Thanks again Doc, I will do that,go boneyarding in hopes to find one.If no luck, I'll find one on Moparts hopefully close to me. And I think I will hold on to the 741.Maybe build another rear in a couple years. I'm getting close to having car ready for this summer although, the minor body work will have to wait for next year.
Thanks, Drew

MoparBrat63@aol.com

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