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Re: 741 case
[Re: JohnRR]
#2294788
04/27/17 12:39 AM
04/27/17 12:39 AM
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Joined: May 2003
Posts: 6,560
Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,560
Downtown Roebuck Ont
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So its possible they would have had an A31 car without a sure grip or is that the giveaway that the pumpkin has been changed ? Pumpkin changed, A31 B body would have had a 489 case, A31 includes SUREGRIP so no it is not possible to have one unless the factory installed the wrong chuck in the housing. What is the date stamped on the ring gear , an A100 I think could be had with a 3.91 with no sure grip and a 741 case. I have a 3.91 SG 741 in my stash that I took out of an A100 van. Kevin
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Re: 741 case
[Re: Cab_Burge]
#2295058
04/27/17 03:24 PM
04/27/17 03:24 PM
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Joined: Jan 2003
Posts: 74,974
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,974
U.S.S.A.
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I traded the original owner for that car, I didn't buy it new. He had been a dealership mechanic but he was a flake also, he insisted that the rear end was the original one that came in the car, he had no reason to lie about that  I didn't say it had any I.D. numbers on it, only that it was a 741 case with a clutch type posi and 3.91 gears in it  I'm not exactly sure when Mopar started installing the 489 cases and the other Eaton type posi, I know it was sometime in the 1969 production year Did you ever pull the chunk and check the dates ? What is the casting date of the 741 ?
running up my post count some more .
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Re: 741 case
[Re: Twostick]
#2295060
04/27/17 03:26 PM
04/27/17 03:26 PM
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Joined: Jan 2003
Posts: 74,974
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,974
U.S.S.A.
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So its possible they would have had an A31 car without a sure grip or is that the giveaway that the pumpkin has been changed ? Pumpkin changed, A31 B body would have had a 489 case, A31 includes SUREGRIP so no it is not possible to have one unless the factory installed the wrong chuck in the housing. What is the date stamped on the ring gear , an A100 I think could be had with a 3.91 with no sure grip and a 741 case. I have a 3.91 SG 741 in my stash that I took out of an A100 van. Kevin Yes and ??? Did you read what I posted ??? ... fully ??? ... I said ... An A100 I THINK could be had with a 3.91 with no sure grip and a 741 case. I am pretty sure an A100 had a suregrip as an OPTION too ...;)
running up my post count some more .
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Re: 741 case
[Re: JohnRR]
#2295615
04/28/17 02:01 PM
04/28/17 02:01 PM
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Joined: May 2003
Posts: 6,560
Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,560
Downtown Roebuck Ont
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So its possible they would have had an A31 car without a sure grip or is that the giveaway that the pumpkin has been changed ? Pumpkin changed, A31 B body would have had a 489 case, A31 includes SUREGRIP so no it is not possible to have one unless the factory installed the wrong chuck in the housing. What is the date stamped on the ring gear , an A100 I think could be had with a 3.91 with no sure grip and a 741 case. I have a 3.91 SG 741 in my stash that I took out of an A100 van. Kevin Yes and ??? Did you read what I posted ??? ... fully ??? ... I said ... An A100 I THINK could be had with a 3.91 with no sure grip and a 741 case. I am pretty sure an A100 had a suregrip as an OPTION too ...;) My apologies. The OP had questioned in an earlier post if a 3.91 SG was even available in a 741. the 3:91 sure grip wasn't produced in the 741 ? When you replied to him on another post about " thinking" an open 3.91/741 was available in an A100, I read that to mean specifically/only in an A100 and only as a non SG which in hindsight is not what you said. I replied to confirm that a 3.91SG was in fact available in a 741 case and was also, as such, available in an A100. Kevin
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Re: 741 case
[Re: mro]
#2295812
04/28/17 10:26 PM
04/28/17 10:26 PM
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Joined: Apr 2005
Posts: 1,107
Lynch Road
mro
OP
super stock
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OP
super stock
Joined: Apr 2005
Posts: 1,107
Lynch Road
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so I'm the OP and still confused. Trying to figure out if the rear was original to the car - or a possibility. With the 3.91 included in the A31 package is it safe to assume it was a SG. Whatever is in there now is in a 741 case and not a SG. What is the most likely case for a spring special A31 3.91 gear ?
68 Satellite Wagon and a few other ones
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Re: 741 case
[Re: Twostick]
#2296441
04/30/17 11:43 AM
04/30/17 11:43 AM
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Joined: Jan 2003
Posts: 74,974
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,974
U.S.S.A.
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My apologies. The OP had questioned in an earlier post if a 3.91 SG was even available in a 741. the 3:91 sure grip wasn't produced in the 741 ? When you replied to him on another post about " thinking" an open 3.91/741 was available in an A100, I read that to mean specifically/only in an A100 and only as a non SG which in hindsight is not what you said. I replied to confirm that a 3.91SG was in fact available in a 741 case and was also, as such, available in an A100. Kevin You are correct in that the 3.91 was put in 741 case and had a sure grip , pretty sure I have the remnants of one in my pile of chucks in the basement. But your assumption is also correct as I think the trucks/vans were the only vehicles available with a 3.91 without a sure grip , that option wasn't available in a performance car , or a passenger car either as far as I know ... 
running up my post count some more .
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Re: 741 case
[Re: mro]
#2296442
04/30/17 11:47 AM
04/30/17 11:47 AM
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Joined: Jan 2003
Posts: 74,974
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,974
U.S.S.A.
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so I'm the OP and still confused. Trying to figure out if the rear was original to the car - or a possibility. With the 3.91 included in the A31 package is it safe to assume it was a SG. Whatever is in there now is in a 741 case and not a SG. What is the most likely case for a spring special A31 3.91 gear ? As Dr. Diff said... 3.91 with sure grip, in a 489 case, in an A31 B body, not a 741 and certainly not OPEN with 3.91's. What is in the car right now was not installed by the factory when the car was built.
running up my post count some more .
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Re: 741 case
[Re: mro]
#2296517
04/30/17 02:08 PM
04/30/17 02:08 PM
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Joined: Nov 2016
Posts: 200
Colorado
Bob J
enthusiast
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enthusiast
Joined: Nov 2016
Posts: 200
Colorado
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Back in the 70's and 80's you would look for these centers in the junk yards or swap meets. They were a low cost way to get the gears and sure grip if you were on a budget. And guess what they would live in cars with 500 hp and street tires most of the time. But you didn't tell your buddies that it was a 741 case but you now had good gears. So a bunch of them were swapped into to cars.
07 Porsche C2 997.1 6spd DD and SCCA Solo II SS
68 Plymouth GTX Convert. 493cu Hotkiss Wilwood Classic air, Building for Solo II Cam
65 Chrysler 300 Convert. project
57 Desoto 2dr. Firesweep 392 Hemi,Wilwood Project with son
2003 Dodge Dakota R/T "DEAD"
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Re: 741 case
[Re: Cab_Burge]
#2329159
06/30/17 02:59 PM
06/30/17 02:59 PM
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Joined: Feb 2003
Posts: 16,133
Mesa, Arizona
dart4forte
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 16,133
Mesa, Arizona
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My 1969 GTS Dart H code 4 speed car(SPD in 9-68) has the original 741 case 3.91 gears clutch type posi in it still Never say never Agree, My 68 GTS has a 741 with a 3.91 SG
“So if it’s on the internet it must be true”
Abe Lincoln
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