Re: A833 aluminum case with OD strength?
[Re: gzig5]
#2566201
10/18/18 11:10 PM
10/18/18 11:10 PM
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Joined: Jan 2003
Posts: 1,908 Nebraska
4406bbl
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,908
Nebraska
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3rd will live fine because it is straight thru the trans, 1-2-4 run on the countershaft and will eventually wear out. If you dont beat on it and use gear oil it will live a while.
Last edited by 4406bbl; 10/18/18 11:14 PM.
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Re: A833 aluminum case with OD strength?
[Re: Porter67]
#2566370
10/19/18 11:00 AM
10/19/18 11:00 AM
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Joined: Dec 2004
Posts: 2,368 Wheatfield, NY
Cuda340
top fuel
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top fuel
Joined: Dec 2004
Posts: 2,368
Wheatfield, NY
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Im not up on the 4 speed od AL trans but im wondering what wears out, maybe the end of the case? If so im running what was a DC al 4 speed that I think had a nice bushing, ect in the al case. I might have pics prior to install. The cluster shaft pin wallows out the case and the gear mesh opens up causing failure. You can have the case bushed at both pin ends for more strength.
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Re: A833 aluminum case with OD strength?
[Re: Cuda340]
#2566372
10/19/18 11:07 AM
10/19/18 11:07 AM
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Joined: Feb 2003
Posts: 21,318 Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Im not up on the 4 speed od AL trans but im wondering what wears out, maybe the end of the case? If so im running what was a DC al 4 speed that I think had a nice bushing, ect in the al case. I might have pics prior to install. The cluster shaft pin wallows out the case and the gear mesh opens up causing failure. You can have the case bushed at both pin ends for more strength. Yup. I had an aluminum case that was bushed. Just as good as an iron case but less weight.
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Re: A833 aluminum case with OD strength?
[Re: Porter67]
#2566570
10/19/18 04:58 PM
10/19/18 04:58 PM
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Joined: Mar 2008
Posts: 9,550 Sacramento CA
Morty426
master
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master
Joined: Mar 2008
Posts: 9,550
Sacramento CA
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Im not up on the 4 speed od AL trans but im wondering what wears out, maybe the end of the case? If so im running what was a DC al 4 speed that I think had a nice bushing, ect in the al case. I might have pics prior to install. I have a DC AL case with OD internals in my Sixpack Shaker Challenger - I would think it would be fine
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Re: A833 aluminum case with OD strength?
[Re: Alaskan_TA]
#2566578
10/19/18 05:21 PM
10/19/18 05:21 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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The A230 is a cast iron 3-speed & it was available behind 383 HP engines. We ran one once & no issues tho circle track ain't a drag race start. 1st was synchonized. (2) different ratios available iirc. one came behind a /6 & the other a small block V8 app.
live every 24 hour block of time like it's your last day on earth
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Re: A833 aluminum case with OD strength?
[Re: gzig5]
#2566680
10/19/18 10:01 PM
10/19/18 10:01 PM
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Joined: Aug 2003
Posts: 43,292 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,292
Bend,OR USA
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I had a 77 Aspen RT with four speed OD behind the 318 about 30 years ago. Seemed like a decent transmission but he motor had no balls. I've seen where folks have adapted E-body tailshaf housings onto the aluminum case A833 OD transmissions. Do these have the strength to live behind a 400-450 lb-ft motor? Really just a three speed with an extra gear isn't it. 3rd is 1:1? I've been inside of almost every type of NP833 trans built for Mopar since 1964 23 and the 18 spline HD Hemi/440 trannys. up to the latest versions of the NP833 OD I have both versions of the NP O.D. tranny in the shop, one A body type like you had and two of the bigger van and pickup types that look identical to the 1970 and above B and E body trannys except the main case is aluminum like the A body are and they kept the longer cast steel tail shaft like the 1970 to 1974 B and E bodies came with stock with both shifter mounts. I put one out of the van/ pickup type O.D. trannys in my 1966 Dodge Coronet Deluxe street car I built, I will NOT beat on it very hard after seeing the gears inside IHTHs
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: A833 aluminum case with OD strength?
[Re: 58pwrwgn]
#2567081
10/20/18 10:00 PM
10/20/18 10:00 PM
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Joined: Jun 2018
Posts: 350 Mequon, WI
gzig5
OP
enthusiast
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OP
enthusiast
Joined: Jun 2018
Posts: 350
Mequon, WI
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Dodge added clearance between the case and countershaft on the aluminum case. When you shift, this clearance allows the countershaft to beat the case countershaft bore out of round. I'm putting one in my Charger, if I like it I will either bush the case or use an iron case. Mopar Muscle had an article named Carrying the big stick, where they bushed an aluminum case. Not the article you mention, but Steve Dulich explains the bushing job in this one. https://www.hotrod.com/articles/mopp-0110-a-833-aluminum-case-buildup/Opinions seem to go both ways. One guy says he sees cars with these OD's lift the front wheel and the next guy wouldn't put one behind a slant-6.
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