Changing Gear Ratios: What Would I Need?

[colnago]

I have a '67 F250 Camper Special with a 4.10 or 4.11 rear end (sorry, I think it's a 4.11, but I don't remember for sure). What would I need to change it to 3.73 or 3.54? Just the ring and pinion? The whole rear diff? Would it be easier/cheaper to find a different rear end in a junk yard, and swap the whole thing?

Thanks,

Joseph

[sargentrs]

You just need the ring and pinion gears. Might as well but new bearings and seals in while your at it. Do yourself a favor and find a rear end shop to set your gears, you'll be glad you did. Pull the chunk, take it to them and let them set it up correctly. I did mine and I'm not sure it's 100% right but I'm rolling the dice.

[tac]

If you are going to learn how this is one of the easiest to do. In addition you will also need shims to set pinion depth, a new crush sleeve and a dial gauge to set backlash. There are rebuild kits that have all the bearings, shims, gaskets, seals and some Prussian blue to check gear mesh pattern.

[cep62]

You just need the ring and pinion gears

Not with a Dana 60
you will also need a new carrier.
I think it's a 3.90 and up take a different size .
There might be a shim to put under the ring gear to help some applications.

[colnago]

you will also need a new carrier.
I think it's a 3.90 and up take a different size.

Rats! That's what I was afraid of! Oh, well, better to find out now ...

Thanks,

Joseph

[Mancar1]

I agree with Sargentrs on doing yourself a favor.
Since my shop and myself are not set up for it. I am going to take mine to a rear end shop.
68 CS with the 4:10. I am going with 3:54.

[cep62]

Rats! That's what I was afraid of!

Don't let that scare ya ,it's just the carrier not the whole case.
I don't think they're all that expensive.
Or maybe just swap a used assembely ?

[dftuttle]

A gear change in the Dana 60 is more difficult than the 9 inch but totally doable. Spicer(Dana) has the instructions on their website. They say you need a bunch of specialized tools to properly set the pinion height in the housing. I found most of them in Ebay for a decent price. The thing I haven't got is the housing spreader. The spreader makes it easier to push the carrier in & out while shimming the carrier side to side. This shimming is needed to set gear engagement.
I did find this link if you really want to try yourself. It has a good explanation of the process & doesn't use the special tools.
http://dana60.com/gears.html

[gregamorton]

on dana 60s is 4.10 down and 4.56 up for swaps. So 3.54s and 3.73s will work in the 4.10 rear. I would not use any thing but a 3.54 if spending the money to change it all out.

[cep62]

Not with a Dana 60
you will also need a new carrier.
I think it's a 3.90 and up take a different size .
There might be a shim to put under the ring gear to help some applications.

on dana 60s is 4.10 down and 4.56 up for swaps. So 3.54s and 3.73s will work in the 4.10 rear

I think ... I musta been thinkin bout Dana 44.

Correct me if I'm wrong.

[sargentrs]

You just need the ring and pinion gears

Not with a Dana 60
you will also need a new carrier.
I think it's a 3.90 and up take a different size .
There might be a shim to put under the ring gear to help some applications.

My bad. Didn't realize it wasn't a 9".