Changing from 513s to 410s Dana

If I swapped the 513 ring/pinion for 410s in my Dana, would I need any special parts or spacers? Thanks

You'll need a 4.10 and numerically lower carrier/diff.

If your spool or posi unit has a ring gear spacer in it now you can PROBALLY reuse the old one by removing the spacer If not you will need a new series three carrier or spool to match the ring and pinion used

u can buy thick ring gear without changing centersection.same price do it all the time on jeeps just read the post u are going the other way so u need new carrier

That is where you begin
I have done a few of these and until recently, I never had a case spreader which is what the pros use. You may be able to reuse the press on carrier and pinion gear bearings if you can get them off the old ones, but I have always bought new.
The one thing I found to be invaluable is a set of set-up bearings. In the kit you get a selection of shims for the carrier and pinion gear and a set of honed bearings for a slip fit on the carrier. Insert the pinion gear in the case with a pressed on bearing (new or used). Start with the original shim pack on the pinion and add or subtract shims as needed. Assemble without the seal because you will be working up to the final setting. Bolt the new ring gear in place on the carrier (new bolts are a good idea) I start with the old shim pack on the carrier and adjust as necessary. This involves a LOT of trial and error. I am not an expert. Once you have established the proper pinion depth and backlash then you can press the new bearings on the carrier and pinion gear and assemble the rear. It is a lot easier to do this with the rear out of the car.

Or you can just take your ride to the local differential shop and pay the man
I have always had a lot more time than money and I am not afraid to get dirty.

They used to make a 4.10 set with a thin ring gear. In my last drag car, I went from 4.88 to 4.10. This was with a spool.

I hope they are still made because I need a set. I want to street drive my '67 Belvedere. Original gear was 4.88, I hope to change to 4.10 without having to buy a new carrier and axles. Why new axles? I doubt there are any new 23 spline 3 series carriers so I'd have to change to 35 spline carrier and axles.

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u can buy thick ring gear without changing centersection.same price do it all the time on jeeps just read the post u are going the other way so u need new carrier

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If I'm remebering correctly the standard 4WD Jeeps use Dana 44 and Dana 27 and maybe one other Dana Corp. rear ends(Dana30?), not Dana 60, correct? If so I have not heard of any of the after market gear companys making thick and thin ring gear sets for Dana 60 I know that Dana/Spicer Corp. made different thickness ring and pinion gear sets for the Dana 70 and maybe the Dana 80, probally the same on the Dana 44 but not the Dana 60 that I'm aware of