Author Topic: 355 Sure Grip  (Read 3946 times)

Offline 06Daytona

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355 Sure Grip
« on: December 09, 2011 - 07:13:55 PM »
When I picked up the Challenger there was a pull style headlight switch. My wife made a few calls to some parts hoarders we know and one mentioned he has a Challenger bulge hood, a couple of doors, some glass and a 355 Sure Grip. Another friend with a 71 Challenger is interested in the hood and I figured I might be able to pull a package deal if I grab the Sure Grip.
So what should I be looking at paying? I don't remember seeing it before, so I don't know how the seals/gaskets are or anything else about it.
1972 Cuda 340 4 barrel 4 speed that looks like a 71
2006 Dodge Charger R/T Daytona
2005 Dodge Ram 2500 Diesel 4X4
2006 Chrysler PT Cruiser Convertible (Kidmobile)
1972 Dodge Charger 318 auto
1970 Challenger 440/727 auto
1973 Plymouth Duster 340/auto (Making it Panther Pink for the wife)
2006 Honda Civic Hybrid (It doesn't save gas, it just diverts it to the Cuda/Challenger)
In desperate need of more property for my growing Mopar family




Offline Topcat

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Re: 355 Sure Grip
« Reply #1 on: December 09, 2011 - 07:32:50 PM »
A 489 or a 741?
Everybody wants the 741 I heard.
Mike, Fremont, CA.


Offline torredcuda

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Re: 355 Sure Grip
« Reply #2 on: December 09, 2011 - 08:23:17 PM »
The 489 is considered the strongest by most.  :dunno:
Jeff
72 Barracuda 340/4spd  Torred
70 roadrunner 383/auto  In-Violet
70 Duster 360/auto drag car  (Petty Blue soon)
04 Ram 2500 5.7 Hemi

Offline Topcat

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Re: 355 Sure Grip
« Reply #3 on: December 09, 2011 - 08:31:53 PM »
The 489 is considered the strongest by most.  :dunno:

Which one's better. I'd like to know also. I have a 489 I plan on selling.
Mike, Fremont, CA.


Offline 72bluNblu

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Re: 355 Sure Grip
« Reply #4 on: December 09, 2011 - 08:40:01 PM »
The 489 is the strongest, it has a 1.78" pinion, but its tapered and uses a crush sleeve. So, some folks like the 742 better, it has a 1.75" pinion, no taper, no crush sleeve. 741 is the weakest of the 3, it has a 1.375" pinion. That said, its plenty strong enough unless you're running a big block at the track.

The 742 is most likely to have a clutch type Sure-grip, followed by the 741. The 489 was later, and used mostly the cone type sure grip. More parts and gear ratio's are available for the 489 and 742 also. The only reason I can see to look for a 741 over a 489 would be that it would be more likely to have a clutch type sure grip, but, its also less likely that it has a sure grip at all. And the 741's are usually loaded with freeway gears, both my Challenger and my EL5 Dart had 741's with 2.76 gears.
« Last Edit: December 09, 2011 - 08:49:44 PM by 72bluNblu »

Offline 72rtchallenger

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Re: 355 Sure Grip
« Reply #5 on: December 09, 2011 - 09:15:53 PM »
the 489 is the better and they sell a kit now to do away with the crush sleeve as I now need that upgrade  ,,as   far as price my guess is $300 to $400 if its original no rebuild ,,if somebody qualified  rebuild it recently $700 maybe but that is just my opinion
72rtchallenger
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Offline LAA66

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Re: 355 Sure Grip
« Reply #6 on: December 09, 2011 - 10:01:29 PM »
 They are advertised on ebay for around $550. :2cents: Not sure if they are orig or rebuilt though.

Offline Cooter

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Re: 355 Sure Grip
« Reply #7 on: December 10, 2011 - 08:55:40 PM »
I went looking for a center Sure Grip section for the 8 3/4 under my Challenger. Hunted and hunted for one under $200....Pretty much knew it wasn't gonna happen.


Found a Trac Loc Dana 60, with 3.54:1 Gear for $100.00 out of 3/4 ton truck. Cut the ends off and welded my cars 8 3/4 ends on ...BOOM! under $300.00 for a Sure Grip 3.55 rear and get the wow factor thrown in for free. (Of course, I did all the labor myself..)
1958 plymouth Belvedere 2dr hd top "Christine" [OO)====V====(OO]
1969 dodge Charger "General Lee"         [___|______I______|___]                        
1968 Dodge Dart 2dr sedan 505" Stroker    (O]=0==========0=[O)                
1970 Challenger R/T Clone "Kowalski Special"   (OO) [___________] (OO)

Offline Topcat

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Re: 355 Sure Grip
« Reply #8 on: December 10, 2011 - 09:55:51 PM »
I went looking for a center Sure Grip section for the 8 3/4 under my Challenger. Hunted and hunted for one under $200....Pretty much knew it wasn't gonna happen.


Found a Trac Loc Dana 60, with 3.54:1 Gear for $100.00 out of 3/4 ton truck. Cut the ends off and welded my cars 8 3/4 ends on ...BOOM! under $300.00 for a Sure Grip 3.55 rear and get the wow factor thrown in for free. (Of course, I did all the labor myself..)

what did you do regarding a pinion snubber?
Late Dana's don't have the provisions to bolt the plate on.
Mike, Fremont, CA.


Offline 72bluNblu

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Re: 355 Sure Grip
« Reply #9 on: December 11, 2011 - 12:36:57 AM »
I went looking for a center Sure Grip section for the 8 3/4 under my Challenger. Hunted and hunted for one under $200....Pretty much knew it wasn't gonna happen.


Found a Trac Loc Dana 60, with 3.54:1 Gear for $100.00 out of 3/4 ton truck. Cut the ends off and welded my cars 8 3/4 ends on ...BOOM! under $300.00 for a Sure Grip 3.55 rear and get the wow factor thrown in for free. (Of course, I did all the labor myself..)

Forget the pinion snubber, what did you do about the axles?

Offline Cooter

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Re: 355 Sure Grip
« Reply #10 on: December 11, 2011 - 07:42:57 AM »
That's just it, the 3/4 ton truck rear takes the SAME SPLINE axles as the 8 3/4..They bolt right the hell in! It's so easy to convert to a Dana 60 it should be illegal. As for the pinion snubber, all I did was modify the old 8 3/4 one to fit the Dana. There's pics in my members rides section under my boys '66 Plymouth I think, as wqell as my challenger build.

Of course, all you are really getting is a stronger center section by reusing the stock 8 3/4 axles, but upgrades are the way to go.




« Last Edit: December 11, 2011 - 07:55:09 AM by Cooter »
1958 plymouth Belvedere 2dr hd top "Christine" [OO)====V====(OO]
1969 dodge Charger "General Lee"         [___|______I______|___]                        
1968 Dodge Dart 2dr sedan 505" Stroker    (O]=0==========0=[O)                
1970 Challenger R/T Clone "Kowalski Special"   (OO) [___________] (OO)

Offline Topcat

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Re: 355 Sure Grip
« Reply #11 on: December 11, 2011 - 11:31:10 AM »
Cooter,

Perhaps you could do a thread showing from start to finish how you do it?
Also, what make/models are you looking for to find the most desirable Dana's to get?
Mike, Fremont, CA.