Do I go for the complete 489 center or just a brand new sure grip?

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trebor75

trebor75

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I recently bought an 8 ¾ axle with the 741 center and 3.23 ratio. It’s an open axle. I want a sure grip.
Now my question is, I have the opportunity to buy a complete 489 center with a used clutch sure grip and 3.31 ratio for the same price as just the brand new sure grip for my 741 center.

Buying the 489 will save me a lot of work, and I also get the 3.31 ratio “for free” so to speak. What would you guys do?
 
buy the 489! Its a lot stronger then the 741, if need be you can rebuild the sure grip unit!
 
.................3.31 WAS MADE IN THE LATE 50s.....b 4 the 741 case, but same as..........not a 489 case.........kim...........
 
also they dont make "new" clutch style lsd's anymore, but u can get the originals and rebuild them
 
oldkimmer said:
.................3.31 WAS MADE IN THE LATE 50s.....b 4 the 741 case, but same as..........not a 489 case.........kim...........
Click to expand...

What more can you tell me about this case. I must have been missinformed. Is it the axakt same case as a 741, only older, does it have another name? Will i find parts for it if needed etc...

Thanks
 
Why not just take some pictures of it and post it so we can better help you
 
trebor75 said:
What more can you tell me about this case. I must have been missinformed. Is it the axakt same case as a 741, only older, does it have another name? Will i find parts for it if needed etc...

Thanks
Click to expand...

there is no reason to run it... i have a spare 742 if u want but why waste money on a 50's center, just go a 42 or 89 and be done
 
805moparkid said:
there is no reason to run it... i have a spare 742 if u want but why waste money on a 50's center, just go a 42 or 89 and be done
Click to expand...

I'm in Sweden and parts are very hard to come by for these axles. Thats why I'm interested in this complete case with a sure grip. Also it's at a good price, usually everything is really expencive over here. Cant take pictures because I dont own it.

If it not a weaker case then the 741 it will hold up for everthyng I have planned for my Duster.
 
The 489 unit is stronger than the 741. I believe parts are still available for both. I just purchased a new cluthc limited slip two years ago. I belirve you could just by clutch parts for the unit and rebuild it,if needed.
 
Don't be afraid of the 741. I punished the 741 in my dart with about 200 1/4 miles passes so far and haven't broke it yet. A 489 is stronger but the one I have to replace my 741 is a cone type sure grip so it's still sitting under the bench.
 
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