3.23 or 3.55 Behind a 318

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Uh AJ "So in this case the tall tires with 3.55s would cruise at about the same rpm as the shorts with 3.23s." :)
 
Wyrmrider said:
Uh AJ "So in this case the tall tires with 3.55s would cruise at about the same rpm as the shorts with 3.23s." :)
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No you’ve done it. Be prepared for a 15 paragraph reply that doesn’t say much.
 
Wyrmrider said:
Uh AJ "So in this case the tall tires with 3.55s would cruise at about the same rpm as the shorts with 3.23s." :)
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Common sense will tell you that. :lol::lol::lol: Exact measurements will tip the scales though. There is probably a Wallace calculator for that. :poke::poke:
 
Don’t worry, AJ knows where it is and will preach it like the Lord almighty wrote it in stone just for him to preach as fact.

toolmanmike said:
Common sense will tell you that. :lol::lol::lol: Exact measurements will tip the scales though. There is probably a Wallace calculator for that. :poke::poke:
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greymouser7 said:
You know what stinks? They changed the software on that page. It now rounds up the hundredths to the tenths on the axle ratio input. I have typed in 2.71 for 8 1/4 axles, 2.76 for 8 3/4 & 9 1/4 axles dozens of times-it did not round up before!
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Mostly because 2.71 and 2.76 are ghey ratios. :rofl:
 
Wyrmrider said:
Uh AJ "So in this case the tall tires with 3.55s would cruise at about the same rpm as the shorts with 3.23s." :)
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10% is 10% , it don't matter if it's in the tires or in the gears. That's why I chose the examples that I did.
There was a time I swapped tall tires on, to hit the hiway and shorties around town. But that was with a lesser powered engine. Eventually I realized the more powerful engine needed taller wider tires. And my tire-swapping days were over.
So then I prepped a second pumpkin with hiway gears,for long trips. But the 1.2 hour swaps each way got to me. Over time I have had up to nine ready-to-go chunks lined up; everything from 2.76s to 5.13s except never had a 3.73 or a 4.56.
Enter the GVOD. And later the 3.09 Commando box.
For those that might want to know; I'm wearing out calculators. Sometimes I got three of them on the go at the same time.
 
AJ/FormS said:
10% is 10% , it don't matter if it's in the tires or in the gears. That's why I chose the examples that I did.
There was a time I swapped tall tires on, to hit the hiway and shorties around town. But that was with a lesser powered engine. Eventually I realized the more powerful engine needed taller wider tires. And my tire-swapping days were over.
So then I prepped a second pumpkin with hiway gears,for long trips. But the 1.2 hour swaps each way got to me. Over time I have had up to nine ready-to-go chunks lined up; everything from 2.76s to 5.13s except never had a 3.73 or a 4.56.
Enter the GVOD. And later the 3.09 Commando box.
For those that might want to know; I'm wearing out calculators. Sometimes I got three of them on the go at the same time.
Click to expand...
Can you explain what a 3.09 Commando box is?:eek: Never heard of that!
 
AJ/FormS said:
10% is 10% , it don't matter if it's in the tires or in the gears. That's why I chose the examples that I did.
There was a time I swapped tall tires on, to hit the hiway and shorties around town. But that was with a lesser powered engine. Eventually I realized the more powerful engine needed taller wider tires. And my tire-swapping days were over.
So then I prepped a second pumpkin with hiway gears,for long trips. But the 1.2 hour swaps each way got to me. Over time I have had up to nine ready-to-go chunks lined up; everything from 2.76s to 5.13s except never had a 3.73 or a 4.56.
Enter the GVOD. And later the 3.09 Commando box.
For those that might want to know; I'm wearing out calculators. Sometimes I got three of them on the go at the same time.
Click to expand...


Can't tell you how many guys run the 8.75 or 9 inch because they are going to change ratios on a regular basis. They are either hardcore sicko's or they've never done it. It's a PITA.
 
yellow rose said:
IIRC there was also a year where some /6 dusters got a 3.09 box. That's IIRC.
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Ya, sorry. I forgot about the slant 6 guys. No lack of respect, just not in the know for that group.
 
If it was born in the Duster and had a 3.09 low,and 3 other gears; I expect that is the od-box, namely;
3.09-1.67-1.00-.73od Whereas..... the Commando is the same as the regular box, except for the low gear. The Regular ratios are
2.66-1.91-1.39-1.00.... Introduced in 1970 I think was a box often called the TA box with ratios of
2.47-1.77-1.34-1.00.....These are all non-hemi ratios with a 1x23spline inputs My favorite is the
3.09-1.92-1.40-1.00..... namely the Commando box. The bigger 1-2 split is worth 16% more Torque-Multiplication or nearly 2 rear gear ratios; say from 3.55s to 4.12s. The penalty is; when getting into second, the drop is also 16% greater so your engine better have some grunt down there. My 367HO doesn't complain much about it, or I just rev it a lil higher before the shift.
My stock smogger-teen didn't care either on account of it's torque-curve is pretty flat. But I can easily imagine a situation where the wide 1-2 split (62%) can be a hard pill to swallow for a smaller cid engine. However it ain't nearly as bad as the 54% 1-2 split of the 3.09od box. Every iteration I put in front of that od-box, really felt that split.

But, from my notes, if that 225/Duster had a 3-speed with an unsynchronized first, it coulda had an A903 with ratios of
2.95-1.83-1.00..... But the later Dusters woulda got a full-synchro A230 with
3.08-1.70-1.00 ....A V8 duster probably woulda had the fully synchro'ed A230 with
2.55-1.49-1.00
As you can see,numerically, the 3.08/1.70/1.00 is pretty much identical to the 3.09/1.67/1.00/.73od except of course the addition of the od gear.
 
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AJ/FormS said:
If it was born in the Duster and had a 3.09 low,and 3 other gears; I expect that is the od-box, namely;
3.09-1.67-1.00-.73od Whereas..... the Commando is the same as the regular box, except for the low gear. The Regular ratios are
2.66-1.91-1.39-1.00.... Introduced in 1970 I think was a box often called the TA box with ratios of
2.47-1.77-1.34-1.00.....These are all non-hemi ratios with a 1x23spline inputs My favorite is the
3.09-1.92-1.40-1.00..... namely the Commando box. The bigger 1-2 split is worth 16% more Torque-Multiplication or nearly 2 rear gear ratios; say from 3.55s to 4.12s. The penalty is; when getting into second, the drop is also 16% greater so your engine better have some grunt down there. My 367HO doesn't complain much about it, or I just rev it a lil higher before the shift.
My stock smogger-teen didn't care either on account of it's torque-curve is pretty flat. But I can easily imagine a situation where the wide 1-2 split (62%) can be a hard pill to swallow for a smaller cid engine. However it ain't nearly as bad as the 54% 1-2 split of the 3.09od box. Every iteration I put in front of that od-box, really felt that split.

But, from my notes, if that 225/Duster had a 3-speed with an unsynchronized first, it coulda had an A903 with ratios of
2.95-1.83-1.00..... But the later Dusters woulda got a full-synchro A230 with
3.08-1.70-1.00 ....A V8 duster probably woulda had the fully synchro'ed A230 with
2.55-1.49-1.00
As you can see,numerically, the 3.08/1.70/1.00 is pretty much identical to the 3.09/1.67/1.00/.73od except of course the addition of the od gear.
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Wasn't it the Feather Duster or something like that that came with a non OD 3.09 box? Seems like it was 74 or 75 or somewhere in there.

Don't have my book here.
 
318willrun said:
I have 2.45's... ….
any half a engine with a bad tuner can run with 4.11's and 9" converter.... try running with a stock converter and 2.45's
:lol:
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Anybody remember a 65 Pontiac Parisienne 2+2, with a two speed slushbox that would hit 60 in first gear, or 70, or maybe 80? But he it didn't lose any time to shifting in the zero to sixty, and it had no traction issues either. I think those PGs had a 1.76 low gear. That's like a third gear in a TA trans
But shoot, just about any 13 year old kid on a bicycle could blow it away off the line.......
 
yellow rose said:
Can't tell you how many guys run the 8.75 or 9 inch because they are going to change ratios on a regular basis. They are either hardcore sicko's or they've never done it. It's a PITA.
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I resemble that remark..lol
8.75 gear changes are eezy peezey.
 
I had a ‘67 Impala with the straight 6 & a PG. 1st would max out at 55 mph.
 
AJ/FormS said:
Anybody remember a 65 Pontiac Parisienne 2+2, with a two speed slushbox that would hit 60 in first gear, or 70, or maybe 80? But he it didn't lose any time to shifting in the zero to sixty, and it had no traction issues either. I think those PGs had a 1.76 low gear. That's like a third gear in a TA trans
But shoot, just about any 13 year old kid on a bicycle could blow it away off the line.......
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I shift out of first gear at 60 mph with 2.45 gears, and that is not revving the stock 360 high, maybe 4900 rpms??? Still cuts 1.9's 60 ft.
 
8.75rear w 3.55/ A833-GVOD;
3.09-2.41-1.92-1.50-1.40-1.09-1.00-.78od, GV in blue.Usually shifted;
3.09-1.92-1.40-1.09-.78 ,but;
3.09-2.41-1.92-1.50-.78 when in a hurry
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It's not really cheating if you put it in writing. Maybe I shouldda called 'em stretcher-gears.
But I gotta tell you when the tach is stuck on 7000 and I push that lil red button, and the tach stays on 7000; what a hoot. Then a bit over a second later I pull the stick, and still on 7000, and another second later the lil red button again, and nothing changes,lol,and one more second to the traps; 93 in the Eighth, and done;
into overdrive; what a blast; Let's go home.
You got even a lil more engine than me, so you're gonna have even a lil more fun than me. Maybe you're already having fun?
 
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