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11-18-2013, 07:41 PM | #26 |
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Join Date: Oct 2012
Location: here
Posts: 2,408
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Re: Stock posi rear end or Eaton Posi Trac?
Well, I'm just happy to know that a good eaton is a good LSD option and when properly set up, (perhaps not as tight as ol Tom above) it'll get down the road without pushin me into unplanned 360s and 720s if I hit a patch of squirrel piss on a light downhill curve full of tar snakes and 5 salt granules left over from the winter slush.
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11-19-2013, 01:20 AM | #27 | |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,248
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Re: Stock posi rear end or Eaton Posi Trac?
The 30 spline 6 lug axles from '65 to early '70 are all the same length.
Quote:
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Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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11-19-2013, 06:37 AM | #28 |
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Join Date: Jan 2010
Location: Regina, SK
Posts: 804
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Re: Stock posi rear end or Eaton Posi Trac?
Thanks Cap'n. Shouldn't bee too hard to find some for scrap value considering all the long boxes rotting in fields around here.
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11-28-2013, 10:38 AM | #29 |
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Join Date: Jan 2010
Location: Regina, SK
Posts: 804
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Re: Stock posi rear end or Eaton Posi Trac?
Ended up going with a Detroit truetrac. Now need to find some axles and somebody to install it. Thanks for all the input!
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09-02-2014, 01:05 PM | #30 |
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Join Date: Mar 2009
Location: WARRENSBURG,MISSOURI,64093
Posts: 1,518
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Re: Stock posi rear end or Eaton Posi Trac?
I bought a 1964 12 bolt posi from a friend, it has the older posi unit that was built only in 1964 and 1965. I did dome research on this posi unit, turns out it uses the same posi clutches and steels as the 1964/65 Corvette. I tried several rear end places, Randy's, drivetrain specialties, tom's rear ends, etc....I got the factory part num,ber from a Friend who works for a Chevy dealer (p/n 3830740) I'll double check the number, but I'm pretty sure this is right. it uses 8 frictions and 8 steels. I know there are sources for the corvettes. I'll post a few pictures of this differential later tonight.
Have a good one! Ben |
09-02-2014, 02:01 PM | #31 |
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Join Date: Mar 2009
Location: WARRENSBURG,MISSOURI,64093
Posts: 1,518
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Re: Stock posi rear end or Eaton Posi Trac?
here's a few pictures of the Differential carrier and the posi clutches and steels.......totally different from your normal "Eaton" type posi carrier......
and the p/n is correct...3830740 (for the clutches/steels) Hope this helps anyone who winds up with one of these, there are some parts, now if I can find a procedure for disassembly and re-assembly for the one I have! ( Hint, Hint) Have a good one! Ben Smith Last edited by snipescastle2; 09-02-2014 at 02:03 PM. Reason: adding |
09-03-2014, 12:49 AM | #32 |
60-66 Nut
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,248
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Re: Stock posi rear end or Eaton Posi Trac?
I rebuilt one of those posi units 34 years ago. The difficult part was getting the springs compresses to be able to remove them. Back then I lacked the patience, and broke the aluminum plates around the spring pockets. I just repaired them with weld. The springs seemed to go back in easier than they came out. Back then the clutches were still available from a GM dealer.
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
09-03-2014, 07:57 AM | #33 |
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Join Date: May 2012
Location: Madison Alabama
Posts: 201
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Re: Stock posi rear end or Eaton Posi Trac?
I ended up using a Tru-Trac unit in a couple of my last build (cars) and they work great. Tru-tracs make no noise and lock and unlock very easy. I used one in my 65 build as well but, sadly it's not running at this time. I will post a report on it when it gets rolling. Sorry for the hijack but, thought you guys might want another option.
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09-03-2015, 02:19 PM | #34 | |
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Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: Stock posi rear end or Eaton Posi Trac?
Quote:
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Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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09-03-2015, 02:31 PM | #35 |
Moderator
Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: Stock posi rear end or Eaton Posi Trac?
__________________
Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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