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#1
03-02-2014, 10:45 PM
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Quick rear question-
I bought a rear out of a 1970 Gto off of a guy on here. Told me it was all rebuilt but it was shot but that's another story. It is a nodular housing and it has the old cone style posi which is shot. I need to replace the posi but I do not know what I need. I want a posi and I want like 3:36 gears(I think). I currently have 3:90's and absolutely hate them. The guy said the rear was a 3:55 which would be stock but it didn't. What do I have a bop 8.2 28 spline? I don't what to open her up til I have the parts
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1968 LeMans Convertible - 462 w hydo roller comp cam forged flat tops- 6x-4 heads- performer intake - 800 cfm QJ- edelbrock 110 gph mech fuel pump- 4 row copper rad- followed by a Th400 w/2300rpm stall then a nodular 10 bolt posi w 3:90 gears ( need 3:55 bad |
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#2
03-03-2014, 09:07 AM
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Rearend
Get a hold of Jim Mitschke (Monzaz) on the board here. He did one for me and I bought it in Texas and shipped it to him and had him do the work. Great job and very reasonable. You could probably ship it both ways for 75-100 bucks or talk to him and have him ship you the parts. There is a certain amount of machine work that has to be done and you will have to factor that in . Good luck. Ed
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#3
03-03-2014, 09:21 AM
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Ok I'll try to look him up- this is the first time I'm hearing machine work has to be done - any more details?
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1968 LeMans Convertible - 462 w hydo roller comp cam forged flat tops- 6x-4 heads- performer intake - 800 cfm QJ- edelbrock 110 gph mech fuel pump- 4 row copper rad- followed by a Th400 w/2300rpm stall then a nodular 10 bolt posi w 3:90 gears ( need 3:55 bad |
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#4
03-03-2014, 09:36 AM
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Jim is great to deal with, I bought my 8.5 from him- although in my case, I just had him use his inventory to rather than shipping a rear to him. 75-100 both ways sounds really inexpensive- let us know if you go that route and what the shipping costs end up being.
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Will Rivera '69 Firebird 400/461, 290+ E D-Ports, HR 230/236, 4l80E, 8.5 Rear, 3.55 gears ‘66 Lemans, 455, KRE D-Ports, TH350, 12 bolt 3.90 gears '64 LeMans 400/461, #16 Heads, HR 230/236, TKO600, 9inch Rear, 3.89 gears (Traded) '69 LeMans Vert, 350, #47 heads: Non-running project |
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#5
03-03-2014, 09:53 AM
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Rearend
Jim shipped my gearset to Alexandria Bay NY to a shipper I use there. Weighed roughly 48#'s and cost 31.22. So both ways from PA might be even less. As far as machine work if that posi was as bad as you say it was you can bet it will need Jim's caressing. IMHO. Ed
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#6
03-03-2014, 10:05 AM
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Info
JD Race & Restoration. 3641 Southern Rd. Richfield Ohio.44286 (330-990-8155). Ed
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#7
03-03-2014, 10:14 AM
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I have a Monzaz rear. Great piece.
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 frittering and wasting the hours in an off hand way.... 1969 GTO, 455ci, 230/236 Pontiac Dude's "Butcher Special" Comp hyd roller cam with Crower HIPPO solid roller lifters, Q-jet, Edelbrock P4B-QJ, Doug's headers, ported 6X-8 (97cc) heads, TKO600, 3.73 geared Eaton Tru-Trac 8.5", hydroboost, rear disc brakes......and my greatest mechanical feat....a new heater core. 
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#8
03-03-2014, 10:35 AM
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Yeah it's the old cone style - don't want to bother repairing it - was just gunna replace it with a eaton or auburn- given my sig what ratio would be best? I have a 3:90 like I said it's not even fun to drive. Before I did the engine work I had a 400 stock engine it had a 3.23 in it and was slow. I live 15 miles from anything either direction and would like a more comfortable cruise not 60 mph at 3000+ RPMs. But I also want it to get up and go when needed. What combos are you guys running(carrier and ratio)? I was thinking like 3.36's would be good. I do go to the track w friends but I'm not hard core about lowering my et's I just go to have a good time
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1968 LeMans Convertible - 462 w hydo roller comp cam forged flat tops- 6x-4 heads- performer intake - 800 cfm QJ- edelbrock 110 gph mech fuel pump- 4 row copper rad- followed by a Th400 w/2300rpm stall then a nodular 10 bolt posi w 3:90 gears ( need 3:55 bad |
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#9
03-05-2014, 12:58 PM
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3 series rear
Email me at EJFCon@kos.net if you want to sell that posi with the 390:1 gear set. Thanks Ed
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#10
03-05-2014, 02:23 PM
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Quote:
http://www.wallaceracing.com/gearcalc.php I drive my car every day and on I-10 at 80mph so a gear lower than 3.08:1 would suck for me without an Overdrive transmission.
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Karl 
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#11
03-05-2014, 02:37 PM
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Quote:
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#12
03-06-2014, 09:05 AM
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i think you would be happy with the 3.36, tho you mentioned you had 3.23 gears and were not impressed? after 3.36, i believe you have to go to 3.55s. go with an eaton clutch posi unit, they are good and rebuildable.
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#13
03-06-2014, 01:48 PM
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Quote:
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Karl
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#14
03-06-2014, 02:41 PM
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i would sell the weak pontiac rear and just put a readily available 12 bolt chevy rear in it. no mods neccesary. unless you got a trailer queen way more stronger and parts availability is much better. just sell your old one and do it. what town are you in?
i live in carbon county outside of lehighton. Jim Last edited by 66 Gas Tires Oil; 03-06-2014 at 03:01 PM. |
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