Dana 60 gearing 3.55 vs 4.10

[BigRigTech]

Yes, but my original 10.25 has a limited slip so it's staying in place. I can change the gears in the 60, I'm good at "improvising".......I played with a gear change calculator - 4.10s would kill my fuel mileage. My truck runs about 1900rpm now in OD at 60mph, thats good enough.

 

[riotwarrior]

Ok so you're swapping gearsets, here is a couple of pictues of someone's home made case spreader. Hope it helps because using any other device or means can actually permanently damage the case if it happens to be spread too much. I think it is about 0.015 that is needed any more and that can damage the case.

Here is a great link http://www.oilburners.net/forums/showthread.php?t=7505 with PDFs and info right from Dana. I hope this helps, as I would surely not like to see failure due to incorrect procedures.

 

[Double-S-Diesel]

when I did the 60 bearings in the 96 didnt need a spreader.
went from 4.10s with a 33" tire to 3.73s and a 35" tire . which worked out to a 3,55 gear. only time I regret it is pulling out on a hill with a load

 

[BigRigTech]

Yeah, it's just fishing the shims into place that sucks....I'm sure I'll curse it more than once while I think if how easy it is to set up a Ford 9"........Got the D60 steamed off today, now I gotta get it offloaded into my shop and start tearing into it tonight. Pics to come, it cleaned up pretty well. I think I ended up wearing most of the dirt....

 

[BigRigTech]

Ok, I was playing around with the gear calculator that Riot posted. Right now with 3.55's, a .71 OD gear ratio and 31.6" tall tires it says at 2000rpm I should be doing 67mph....Sound's about right to me....If I switched to 4.10's it says I would be doing 58mph at 2000rpm......So 2350rpm would give me 70mph.....Seems like a switch to 4.10's is a no brainer now that I took a 2nd look at it. I could swap the freebie 10.25" 4.10's on to my posi carrier and go from there? This would help my towing a little too.

 

[Pipeliner_86]

Go with 4:10's, you won't be dissapointed. I went from 4:10 to 3:55 in my wood truck, now I have lost all my low end pulling power. I have great hwy crusing rpm's now, but I hardley drive the hwy. I wish I had kept the 4:10's and maybe find an overdrive unit for my C6.

 

[smokinporsche]

How is the 3.73 with posi for towing?

 

[7.3shrk]

If you want the traction, why not swap in the freebie rear, and a lock right - no gear removal?

 

[BigRigTech]

I found a set of D60 3.54 gears locally, should have them here before the weekend with any luck. $100 for the gears - reasonable enough on the price. I'd rather have the 3.55's, getting too good of fuel mileage to change them out for 4.10's......I had to wait a month to get these gears, he's going from 3.54's to 5.38's in his rock crawler and he took them out this past weekend. I have my 4.10's on fleabay right now.

 

[riotwarrior]

rofl...first time you got to pull anything long distance with weight....you'll go :***: and wish u had gone 4:10's mark my and a bunch of others words....

 

[BigRigTech]

All the towing I will be doing will be only 4 or 5 times a summer to the drag strip, total tow weight less than 5500lbs including the trailer. The local strip is 1.5hrs from my house....I'm a cheap SOB and with the price of fuel these days I would rather have good fuel mileage for 360 of the 365 days in a year...

 

[riotwarrior]

A cheap SOB would realize that there is a ton of fuel available in wast oil and so forth....then use 4:10's to waste that there waste oil and make some good pullin power...rofl

 

[82F100SWB]

Meh, 3.55's are perfectly fine for pulling, I wish that my truck had 3.73's, or the turbo made boost a bit lower so I didn't have to run 70 mph when towing to be right in the power(I could put on my 235/85 winters to bring up the rpm I suppose.. ,) but, I wouldn't swap to 4.10's for just pulling 5500 lbs, I've been known to yank 14,000+ towed load with mine with 3.55's, and it does just fine... That said, I think I'm going to go ZF and 4.30's with 35's next summer...

 

[BigRigTech]

I have 235/85's on mine now, seems to do ok pulling.

 

[Agnem]

I'd never own 4.10's without double overdrive.