WTB 489 sure grip or trade a Dana unit

[CHARGERSTEVEN]

Looking to trade a dana unit for a 489 sure grip,the Dana has been service n been sitting n collecting dust pm me with what you have

 

[Bruce]

Do you have the complete Dana or just the sure grip?

 

[CHARGERSTEVEN]

I have the complete 489 but was hoping to trade the unit in pic for a Sure grip as the one I have in open ,all I have is the carrier for sale or trade

 

[Wmlantis]

Anyone know how to tell if that Dana unit will take a 4:10 and numerically lower or higher gear set seeings no one knows for sure what gear was used on it. Is their a way to tell from the casting numbers?

 

[snakeoil24]

4.56 and above requires a spacer. which really isnt a good idea. The unit you have looks like a earlier Power lock which is the best you can get. It came in 69 and earlier Dana's. The 1970 and later was one piece housing, which is a shure grip. No where near is strong as the two piece unit. This looks like a dana that came with 3.54 or 3.55 ratio. and it looks like a power lock for sure.

 

[Cranky]

Set the carrier up on the bearing fit on something flat with the gear flange face facing up and then measure from the face to your flat like this. http://www.differentials.com/technical-help/carrier-breaks
4.10 and down is 2.225 and 4.56 and up is 2.420. They are nearly a 1/4" difference so your flat doesn't have to be perfectly flat to be able to check which one it is. Also, you can use a truck 60 Power Lock unit (called a Sure Grip in cars). The one piece carriers that came in trucks is called Trac Lock which suck. Don't recall ever seeing one that came from a car though. I rebuilt a 1970 Dana years back and it had a Power Lock in it.....

 

[CHARGERSTEVEN]

Here are some recent photos