489 rear end I want to change center both are 489 so do I have to worry about adjusting axle? changing from 4:10 to 3:23 also do I need to check anything while doing it? car runs find both sure grip centers. I dont have to pull brakes correct?
changing 8 3/4 centers ?
- Thread starter davek
- Start date
- Local time
- 4:38 PM
- Joined
- Jan 19, 2018
- Messages
- 2,944
- Reaction score
- 2,278
- Location
- calvert city, ky
It's been a while, but I don't think you have to pull brakes.
66Satellite47
Well-Known Member
To install the new pumpkin you need to pull the axles out. Just reset the adjuster setting.
reset adjuster settings? also can I put 3:55 in either centers?
67 coronet
Well-Known Member
if you have green bearings you will no longer have an adjuster. you can put any gear ratio you want in there as long as its for that rear.
thank you,1st time for everything.
You need to reset/check axle side play. Except if you have green bearing, as note by 67 Coronet.
only pass side has adjuster so how do I know if drive side is good? or does it adjust for both?
747mopar
Well-Known Member
Whoever is disagreeing with this is.. well not very brite? If changing centers you have no idea how much wear difference there is in the center pin from one to the other so absolutely you should.
747mopar
Well-Known Member
There's a floating center pin in the center of carrier that the axles ride against, since it floats it allows the adjustment from 1 side to travel threw your center so yes 1 side does both. 1 very critical thing to do is always make sure that pin is in place because they do fall out sometimes.
Contacted him disagree by mistake.
how do I know the pin is in place?
Depends on which sure-grip unit you have. Clutch type has it. If you look in axle hole and see a hole and can see through it, it's missing. If you look and a round button it's a clutch type, if you see a flat plate its an Alburn unit. Not sure on name.
clutch type correct?
this is a 489 center ,is that a alburn unit? gears have 69 stamped on them. 70 was a changing year sooo?? its flat on the inside,it does have the large 9 on the unit
Alburn top pic. Looks like its ready to go. THE bolts to hold it together are on the opposite side on a clutch unit.
The FSM(or threads here on FBBO) will detail the end-play adjustment process; super easy but you will need a dial indicator w/ a magnetic base(apologies if you already knew this)
I looked it up and it said if you dont have the dial make sure no more play then the thickness of a dime. Might see if a local auto store rents them.
747mopar
Well-Known Member
You can buy cheap ones, you don't need a high dollar one for this job.
That is a cone type sure grip. The spacer is there so run it.
I have always done it by feel. As stated thickness of a dime is about right. The bearings just need a little end play the same as front wheel bearings. Before pulling the axles when you are changing it out push/pull on the axle and you will feel the slight play, go to the other side and it should be the same. Here is where you can put a cheap dial indicator to see where your at. Swap out the third member, install axles, check end play, spin the axles and push/pull the other side, go back snug adjuster till it is where your happy. Lock it down, put the drums on and take it around the block. Pull the wheels and check it again. I usually have to go another notch after a test drive.
I have always done it by feel. As stated thickness of a dime is about right. The bearings just need a little end play the same as front wheel bearings. Before pulling the axles when you are changing it out push/pull on the axle and you will feel the slight play, go to the other side and it should be the same. Here is where you can put a cheap dial indicator to see where your at. Swap out the third member, install axles, check end play, spin the axles and push/pull the other side, go back snug adjuster till it is where your happy. Lock it down, put the drums on and take it around the block. Pull the wheels and check it again. I usually have to go another notch after a test drive.
Similar threads
