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741 Ring & Pinion #1150208
01/04/12 07:38 AM
01/04/12 07:38 AM
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Posts: 475
HEMPSTEAD TX
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CUUDAK Offline OP
mopar
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I picked up a 741 open chunk with a new 3.23 and wondering if the ring and pinion is the same as on the cone style sure-grip?


SRT8 CHARGER "Four door bore" <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
Re: 741 Ring & Pinion [Re: CUUDAK] #1150209
01/04/12 08:43 AM
01/04/12 08:43 AM
Joined: Jan 2003
Posts: 21,050
Niles , Ohio
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therocks Offline
oh wait.but hey.lets see.oh yeah.
therocks  Offline
oh wait.but hey.lets see.oh yeah.
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The SG will work in the 741 housing but if the R&P came from a 742 or 489 they wont fit the 741 housing.Rocky


Chrysler Firepower
Re: 741 Ring & Pinion [Re: CUUDAK] #1150210
01/04/12 10:39 AM
01/04/12 10:39 AM
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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MoparforLife Offline
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Upper Midwest
Quote:

I picked up a 741 open chunk with a new 3.23 and wondering if the ring and pinion is the same as on the cone style sure-grip?


You Can use the sure grip on the 741 ring and pinion IN tech 741 case as long as you use the side bearings for the sure grip unit.

Re: 741 Ring & Pinion [Re: MoparforLife] #1150211
01/04/12 02:58 PM
01/04/12 02:58 PM
Joined: Aug 2007
Posts: 475
HEMPSTEAD TX
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CUUDAK Offline OP
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I have three 741 cases and two are 741 cone style Sure-grips. The two Sure-grips are 3.55 and 3.91. I just want to swap the ring & pinion from the 741 that has the open diff into one of the 741 cases with the Sure-grip. Just wanted to make sure the r&p is the same between the open and the SG.


SRT8 CHARGER "Four door bore" <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
Re: 741 Ring & Pinion [Re: CUUDAK] #1150212
01/04/12 03:18 PM
01/04/12 03:18 PM
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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MoparforLife Offline
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Upper Midwest
Be easier to just switch the sure grip unit to the 741 3.23 set up. All you would need to do is put the ring gear on the sure grip case and reset the back lash. Leave the pinion alone.

Re: 741 Ring & Pinion [Re: CUUDAK] #1150213
01/04/12 05:26 PM
01/04/12 05:26 PM
Joined: Jan 2003
Posts: 74,907
U.S.S.A.
JohnRR Offline
I Win
JohnRR  Offline
I Win

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Posts: 74,907
U.S.S.A.
Quote:

I have three 741 cases and two are 741 cone style Sure-grips. The two Sure-grips are 3.55 and 3.91. I just want to swap the ring & pinion from the 741 that has the open diff into one of the 741 cases with the Sure-grip. Just wanted to make sure the r&p is the same between the open and the SG.




I would sell one or both of those POS cone type chucks and buy a clutch type sure grip to swap in .

edit ... oh wait that doesn't answer your original question.

Do as the guy above me says , just swap a cone type into the 3.23 and have the open put into the one you take it from ...

Last edited by JohnRR; 01/04/12 05:27 PM.
Re: 741 Ring & Pinion [Re: CUUDAK] #1150214
01/04/12 08:12 PM
01/04/12 08:12 PM
Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
torkrules Offline
I'm neurotic
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Joined: Nov 2003
Posts: 2,715
closer to Canadian beer!
Quote:

I picked up a 741 open chunk with a new 3.23 and wondering if the ring and pinion is the same as on the cone style sure-grip?




All the 8-3/4 rears have interchangeable SG units (clutch or cone). The gears won't interchange. The 741 is a small diameter straight pinion, 742 is large straight pinion and the 489 is a large tapered pinion that uses a crush collar for preload.

Re: 741 Ring & Pinion [Re: torkrules] #1150215
01/04/12 11:50 PM
01/04/12 11:50 PM
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Posts: 475
HEMPSTEAD TX
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CUUDAK Offline OP
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Thanks for all the info folks!! I will just install the 3.23 ring gear on the sure-grip and put it in the open case.


SRT8 CHARGER "Four door bore" <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
Re: 741 Ring & Pinion [Re: therocks] #1150216
01/05/12 12:32 AM
01/05/12 12:32 AM
Joined: Jul 2008
Posts: 30,250
Florida STAYcation
dIc dOc Deity ! Offline
The village idiot's idiot
dIc dOc Deity !  Offline
The village idiot's idiot

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Posts: 30,250
Florida STAYcation
Quote:

The SG will work in the 741 housing but if the R&P came from a 742 or 489 they wont fit the 741 housing.Rocky




...since THIS GUY has been werkin' on Mopars since the Stone Age .... TAKE his word furr it ..







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