I got a new Spool for Christmas. After I get back from the banquet and get my car aligned I want to drop the pumpkin and install the spool.

I was just wondering if you have any tips/step by steps or anything to be aware of? The rear is a 741 Case with a 3.91 single track in it now. And I still have the tapered (adjustable axle bearings) Is there a thrust shaft I need to put back in the spool for axle adjustment?

Pull out the rear
Remove Ring gear and install on Spool (LH bolts)
Press bearings onto spool

next steps?

Rick

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2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

Get a repair manual and review the procedure for removing and replacing the differential. Basically you snug up the adjuster nuts and then move the ring gear toward the pinion until you get the sepecified amount of back lash measured with a dial indicator on the ring gear tooth. If you are using the tapered bearings you do need the thrust block that fits between the two axle ends. I have never tried this but would imagine you could just take the one from the open differental and put it in the bore of the spool between the axles. Maybe somebody else who has actully used a spool with tapered bearings could help.

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If you didn't drive it there, it's not a street car.

I think Seymour worded this incorrectly..


If you were using the OE tapered bearings on your axles then you would need the Block in between the axles to get the correct backlash on the tapered bearings.


I might just switch to the Green Bearings at this point for your spool... as a thought. That's what I have on ruster.. they work fine.. no back lash on the axles to worry about and no center spacer to worry about either.. Follow Seymour's advice on the Factory service manual.


Greg

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Just a heads-up, a spool has to have green bearings, and to be fully legal you have to have aftermarket axles. Most tech inspectors will never look, but you may get popped if your tech area happens to be gravel.

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I am not switching the axle bearings. Maybe later but not right now. So that is why my question about the thrust block. If someone knows for sure about this please let me know. I don't see a problem, but sometimes I don't see the obvious. I do have the Factory manual for setup once I go back together.

Rick

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2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

I was typing while you were Dennis. So your saying I can't use the thrust block from the original rear.

Why do they require the aftermarket axles? I don't think my 175 HP is going to be a problem on my cut down C body Big Bolt axles.


Rick

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2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

That's just the way the rulebook is written Rick.

A spool is harder on axles turning than it is launching.

Like I said, most tech guys will never check, especially in a slower car, but if they see you dragging a tire turning in gravel they may pop you.

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I have a 742 case in my differential with a spool with green bearings. Green bearings are cheap to buy and install but machine shop has to do this because they are pressed on . You have to do this with a spool Thanks Ron










It Aint Over Until I Win

Installing green bearings is easy. Installing the locking ring gets a little tougher. I've done it with a length of pipe, a big hammer and a wood block.

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PS: Do not use the block with green bearings.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
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Yes, thrust block must be removed or left out if using green brngs.

Lou

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Are (is) the splined center of your spool bored completly thru or are the splined axle holes "blind"?

Thinking this thru, how about using the thrust block out of an open carrier to take-up the center space... and providing the needed thrust for roller bearing end play adjustment?

(I need to look at some spools... I have Green bearing so never needed to deal with this issue)
DD

That is what I was hoping to do. My spool is open the entire way through. Do you see any problem with that Doc?

Rick

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2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6

Is it also splined all the way thru?
My only concern would be on how good is the fit between the thrust spacer and the splines... on second thought... it's not going to "hurt" anything if it's a little loose in there.

The other concern is keeping the spacer in there during the installation but some thick grease on it should keep it in place long enough to get the axles shafts installed.
(be careful when you remove that 'pig' later, the center spacer may stick to the end of the axle, long enough to pull it out of the spool and into one of the housing legs... but not all the way out.
I hate to think about what that big chunk of metal would do if "left loose" inside the axle assembly.
DD

Doc it is open clear through but there is about 3/4" of unsplined area in the center.

Rick

_________________
2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6