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8-3/4 gear size ? #1883986
08/03/15 12:26 AM
08/03/15 12:26 AM
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383man Offline OP
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I was talking to a buddy today and he said that he thought the 1969-1/2 six pack Runners and Bee's only got the Dana with the stick car but I thought all 1969-1/2 six pack 440 cars got the Dana with a 4.10 gear which was in both the auto and stick.
And we both thought that 3.91 was the largest gear number size you could get in the 8-3/4 even in the B-body ? I know the A-body offered the 3.91 as the tallest gear in the 8-3/4 but I cant remember for sure if that was the same in the B-body.
Can anyone shed any light on what is correct and thanks. wave Ron

Last edited by 383man; 08/03/15 12:28 AM.
Re: 8-3/4 gear size ? [Re: 383man] #1884000
08/03/15 12:44 AM
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Ron, looked in the 69 parts book and only saw 3.91 as the tallest gear for 8 3/4. 9 3/4 showed a 3.54 gear

Re: 8-3/4 gear size ? [Re: 383man] #1884004
08/03/15 12:50 AM
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1970/71 book showed 4.10 in both the 8 3/4 and 9 3/4. There was a notation on the illustration page saying: 9 3/4 with manual transmission with 426 440 engines in cuda challenger and B body with sure grip(1971)

Re: 8-3/4 gear size ? [Re: mopars4ever] #1884364
08/03/15 03:36 PM
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D_C Offline
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According to this Hotrod Magazine article, ALL 1969 1/2 A12 Roadrunners (6bbl), wether Automatic or Manual Transmission, received the Dana 60:

http://www.hotrod.com/cars/featured/mopp-0902-1969-m-code-a12-road-runner/

Quote:
Behind this was the only driveline option on the buildsheet (either a 727 Torqueflite or an A833 New Process four-speed), and every A12 got a Dana 60 with 4.10 gearing and 11-inch brakes. The steel 15-inch wheels with redline rubber and no hubcaps finished it; these A12 cars were the only regular production model ever offered this way.

Re: 8-3/4 gear size ? [Re: 383man] #1884479
08/03/15 05:51 PM
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JohnRR Offline
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All 69.5 A12's were Dana 60 with 4.10 , 4 speed or auto.

I'm to lazy to look up when the Super Track pack started but if you got an Automatic with Super Track Pack it would have been an 8 3/4 with a 4.10 , not sure if that started in 69 , but it was like that in 70-71


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Re: 8-3/4 gear size ? [Re: 383man] #1886907
08/07/15 02:03 PM
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383man Offline OP
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Thanks for the replies and info. Ron

Re: 8-3/4 gear size ? [Re: 383man] #1886924
08/07/15 02:44 PM
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Super track pack and super performance axle package included a 4.10 geared DANA 60 rear for cars equipped with a 4 speed OR automatic transmission.

As far as I know, 4.10 gears were never installed in an 8.75" passenger car rearend by the factory during the muscle car years. I'm not sure about the late '50s/early '60s, however.

Re: 8-3/4 gear size ? [Re: JohnRR] #1887026
08/07/15 06:06 PM
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Originally Posted By JohnRR
All 69.5 A12's were Dana 60 with 4.10 , 4 speed or auto.

I'm to lazy to look up when the Super Track pack started but if you got an Automatic with Super Track Pack it would have been an 8 3/4 with a 4.10 , not sure if that started in 69 , but it was like that in 70-71


Ive never seen anything that suggested a 4.10 came in the 8.75.


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Re: 8-3/4 gear size ? [Re: 383man] #1887142
08/07/15 09:37 PM
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4.10's were Available in '58.


526 cubes of angry wedge, pushbutton shifted, 9 passenger killer!
Re: 8-3/4 gear size ? [Re: 383man] #1887350
08/08/15 10:04 AM
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4.10s were available in 4x4 trucks with the 8.75 axle. Perhaps they could have been ordered in cars as well.


1970 Dodge d100/eventually going on a 77 D100 frame
Re: 8-3/4 gear size ? [Re: 383man] #1887381
08/08/15 11:15 AM
08/08/15 11:15 AM
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lewtot184 Offline
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3.91's were the lowest 8 3/4 gear offered beginning in 1969. exception would have been 62-64 max wedge/super stock.

Re: 8-3/4 gear size ? [Re: lewtot184] #1887458
08/08/15 01:37 PM
08/08/15 01:37 PM
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The first replacement rear-end for my '71 Charger (in 1977) was drum-to-drum, 4.10 Trak-Lok out of a Dodge Pickup. The Spring mount pads needed to be redone to fit, but other than that, the outside width was correct.

Eventually, I swapped in a Dana 60 (also with 4.10 gears).

Re: 8-3/4 gear size ? [Re: JohnRR] #1887495
08/08/15 02:39 PM
08/08/15 02:39 PM
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elmor353 Offline
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My 69 GTX came with the super trac-pack. It was automatic, with 4.10 Dana.







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