kahuna1949
Well-Known Member
3.55 sure grip, What is a good one worth?
3.55 sure grip
- Thread starter kahuna1949
- Start date
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K.O. SWINGER
Meeting in the alley since 1976
rear end or center section ?
fishy68
Tyr Fryr's Inc.
Prices vary quite a bit but I'd guess anywhere from $350-$550. What case casting and what type sure grip is it? How many miles on it?
kahuna1949
Well-Known Member
Change that to 3.23 489 case sure grip. Will I need to change anything like the drive shaft?
kahuna1949
Well-Known Member
Center section. And you gave me a couple of questions to ask, mileage and kind of sure grip. Thank you.
fishy68
Tyr Fryr's Inc.
3.23's don't bring quite as much money as 3.55's do but since it's the 489 case that helps some. Type of sure-grip will determine the final price. As long as you have a 8-3/4 in the car now the driveshaft length will be the same but there are a few different yokes used. The large majority of A-body cars use the small 7260 U-joint. Make sure and ask what yoke it has and if he's not sure measure yours and have him measure his and compare. Even if your car has a small U-joint and his has the large u-joint you can use it by changing your rear u-joint to the 7260 to 7290 conversion u-joint, but that's added extra cost and labor so keep that in mind.
Glad to help
kahuna1949
Well-Known Member
I do have 8 3/4 . I was exchanging emails, thought it was a pull part (well kind of was). Thought he had a 3.55 and comes back with.
489 case with sure grip 323 ratio. $450.00 (2 to choose from)
489 case with 276 non sure-grip. $100.00
70 dodge charger in my back yard with unknown 3rd member 250.00 if you pull it
70 Plymouth satellite in my back yard with unknown 3rd member, $150 if you pull it
Release of liability required in advance if you pull any parts.
489 case with sure grip 323 ratio. $450.00 (2 to choose from)
489 case with 276 non sure-grip. $100.00
70 dodge charger in my back yard with unknown 3rd member 250.00 if you pull it
70 Plymouth satellite in my back yard with unknown 3rd member, $150 if you pull it
Release of liability required in advance if you pull any parts.
fishy68
Tyr Fryr's Inc.
The Charger and Satellites may have the larger U-joint and in 70 will most undoubtedly have the weaker cone type sure grip that may be pretty well worn out. Or they may not even have a sure grip at all but it's not hard to tell if you jack them up. The 489 case 2.76 open diff isn't real desirable to most people so the $100 is a little pricey, at least in my opinion. I can usually pick them up for $50-75. Last month a guy gave me one for free. The 3.23 sure grips better have the clutch type sure grip for $450. If they don't I wouldn't pay near that much. No more than $350
kahuna1949
Well-Known Member
If I have a center section already, I could buy a Mopar 8.75, 8 3/4, clutch type sure-grip, power-lock, posi from lets say Dr Diff. and between the two have a complete suregrip center section ,ready to go after assembly. I am not sure it might have been fishy68 that linked over to part number that would allow me to use a 7290 yoke when the old one was a 7260 a TRW 20226 is that a fit?
fishy68
Tyr Fryr's Inc.
Yep. A lot of guys do it that way. I have in the past also. I mentioned a conversion U-joint being available but I don't think I provided a link. Not sure on the TRW #. I'm pretty sure Dr. Diff sells the conversion joint
kahuna1949
Well-Known Member
Thanks for the help, fishy68
fishy68
Tyr Fryr's Inc.
Your welcome
kahuna1949
Well-Known Member
If I see springs its not a clutch type unit on the sure grip?
1970Duster
Well-Known Member
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If you see springs it's a cone type
fishy68
Tyr Fryr's Inc.
Correct
mattm
Well-Known Member
i know everyone has a opinion but my 2 cent is if u do any interstate driving n want to run say 70 to 75 for any length a time u will want the 3.23s anyway i just swapped a 8.8 explorer disk brake rear in my dart i started with the 3.73s it came with n with a 26 inch tire freeway driving was out too much gear i then went wuth 3.55s it helped some but nothing substantial so i now am running 3.30s very happy now
Tracy is right on the money as usual. I got a 4.56 sure grip off Ebay last year. It was advertised as a clutch type. Price was 450 shipped, so I snagged it. Pics weren't that great.....and I shouldda asked questions, but there was the gear I need and in a sure grip. I got it and it was a cone type. I sent the seller a messege letting him know and he almost immediately refunded 100 bucks. I got double lucky because upon teardown the unit looks new. Literally zero wear like the cones have never slipped at all. I'm gonna run hell outta it.
kahuna1949
Well-Known Member
I appreciate the help Thank you, Rod I could see me doing that...but not now!
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