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#1
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Is this an 8.2 or 8.5 rear
At work right now so limited to the pictures on my phone. I hope to get more pics tomorrow. Based on these pictures of the rear in my 69 Lemans, is anyone able to tell if it’s the original 8.2 or an 8.5? BTW, it has 4.33: gears
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears '64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears '69 LeMans Vert, 350, #47 heads: Non-running project Last edited by grivera; 08-21-2023 at 02:49 PM. |
#2
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Judging by the cover, an 8.2.
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“It takes considerable knowledge just to realize the extent of your own ignorance.” Dr. Thomas Sowell |
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#3
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8.2.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#4
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Thank you. At some point I’ll have to decide on what to do with the rear. Right now I want to make the car reliable so that when it’s time for bodywork it is mobile/moveable under its own power. I’m not ruling out building my spare 455 block and using my spare set of 310 85cc KRE heads, but that is long term. If I go that route will need a stout rear.
If the current #s matching 350 proves to be solid I have no issue cruising and enjoying it. This will lead to a decision point of put street gears in the 8.2 or get a stout rear for what may come down the road…
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears '64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears '69 LeMans Vert, 350, #47 heads: Non-running project |
#5
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Well at least you can swap in some more street friendly 3.36 gears if you decide to keep that rear end, that’s the lowest gear set numerically that will fit your posi unit.
You’re gonna really hate driving around with 4.33s before long.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
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#6
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It can be a rush on street tires! Esp going into 2nd gear.
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#7
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most people focus on the negative there is however the other side of the coin, when it comes to deep gears 4.11 to 4.56 and a 3.75 stroke they can be alot of fun as well also 4.33 isnt as common of a ratio and if its a OE gear can have some resale value there isnt very many available either new or old I have a 1970 8.2 F-body 3.36 posi and its the 2 piece carrier with cones yours appears to be a 1 piece unit is that because of bolt in axels vrs C'clips?
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A man who falls for everything stands for nothing. Last edited by Formulas; 08-21-2023 at 05:20 PM. |
#8
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Let’s not forget Dairy Queen.
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#9
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Quote:
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears '64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears '69 LeMans Vert, 350, #47 heads: Non-running project |
#10
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I wanna know how that thing go's geter done, Please
GT |
#11
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Personal opinion, always build best/better/bigger/beefier. Even if the car never reaches the point to take advantage of it, you KNOW you will never have to worry or do it again. If you do a 'get-by' fix, the money/effort will be wasted in the long run.
I wish I wouldn't have built the 8.5 in the 442, and just gone straight to a Moser 12. I never expected to do a stroker engine for that car, but it fell in my lap. For another $550 over the cost of doing the 8.5, I would have had that Moser. And now it needs it. .
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. 1970 GTO Judge Tribute Pro-Tour Project 535 IA2 http://forums.maxperformanceinc.com/...d.php?t=760624 1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car https://forums.maxperformanceinc.com...ght=procharger Theme Song: http://www.youtube.com/watch?v=7zKAS...ature=youtu.be |
#12
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Judging by it's cover...
You cannot judge an 8.5 by it's cover. There were a couple of covers used, and the one I have (71 Cutlass, bolt in axles) uses the 8.2 cover. Ol' Pinion Head made some sneaky ones, take a grinder to the square lugs. A step in the side profile will give it away.
Where the brake line bracket is mounted, does it use the 12 o'clock cover bolt (8.2), or is there a cast provision for it (8.5) on top? Casting number? |
#13
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Quote:
Quote:
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears '64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears '69 LeMans Vert, 350, #47 heads: Non-running project |
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#14
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9795082 is a 1969 rear made using gray iron, not as strong as the 9795084 nodular iron unit.
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So long, farewell. |
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#15
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Thank you!
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears '64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears '69 LeMans Vert, 350, #47 heads: Non-running project |
#16
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Quote:
.
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. 1970 GTO Judge Tribute Pro-Tour Project 535 IA2 http://forums.maxperformanceinc.com/...d.php?t=760624 1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car https://forums.maxperformanceinc.com...ght=procharger Theme Song: http://www.youtube.com/watch?v=7zKAS...ature=youtu.be |
#17
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Is it an Eaton style or Cone?
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears '64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears '69 LeMans Vert, 350, #47 heads: Non-running project |
#18
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Your question interested me so I went hunting on-line. I found this and think it answers your question if you look through the whole thing like I did. Hopefully it will be of help. (I personally think you have a detroit true trac on page 14 but review and see what you think.)
https://www.eaton.com/ecm/groups/pub...ct_3167716.pdf
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"No replacement for displacement!" GTOAA--https://www.gtoaa.org/ |
#19
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Auburn unit. https://justdifferentials.com/auburn...ntiac-8-2.html Oh, and it's a cone style... https://auburngeardiffs.com/cone-clu...differentials/ Or, OE 2 pinion https://forums.maxperformanceinc.com...d.php?t=823573
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So long, farewell. Last edited by Held for Ransom; 08-27-2023 at 04:14 PM. |
#20
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9" Moser is SO MUCH EASIER, LOL!
Tom V.
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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