Replacing 3:55's to 4:10's...

[BigStroker]

What is involved in changing a set of gears in a Dana 60 from 3:55's to 4:10's?

I might have my hands on an axle but it's 3:55 gears and I need 4:10's

 

[Swany]

Gears are touchy, if you haven't wrenched on gears before I'd recommend you have a professional shop do it. Or, you'll just end up pushing your truck.............as usual

 

[BigStroker]

Originally posted by Swany
Gears are touchy, if you haven't wrenched on gears before I'd recommend you have a professional shop do it. Or, you'll just end up pushing your truck.............as usual

Dang I was hoping you wasn't gonna say that.

I've wrenched on alot of things...but never gears

 

[Swany]

I'm pretty sure that Dieselmaster or Mastertech could help shed some more light on this, I've wrenched a lot too but gears I don't mess with.

 

[Duke]

Don't mess with it unless you absolutely have to. A rear shop can do it for a reasonable cost.

Why are you going to 4.10's? I think 3.55's are perfect with a little light bombing.

You're fuel mileage will suffer and you'll be running a lot more RPM's at 70 MPH+

 

[Mike]

Duke,

Looks like he needs to change to 4:10's since that is whats in his rear end right now. Hes looking to swap out a Dana 50 to a Dana 60 front axle. The 60 hes found has 3:55's in it.

Paul,

As hard as 60's are to get your hands on you might just pick it up and take it to a rear end shop and have them put in a 4:10 set for you.

 

[Duke]

95 Stroker,

OK, I see what you mean.

Tell ya what TP, unless you're towing a monster trailer, you might want to put a 3.55 unit in the rear. I think the 3.55's or 3.73's are the best gears for these trucks. Your truck has so much torque already. There's no reason to go more than 3.73's on a diesel pick-up. You might find it to be cheaper to do the Sterling down to 3.55's rather than the D-60 up to 4.10's, anyway.

I had 4.88's in my 450 and they're awful. I switched to 4.30's. Better, but still too geared-down. With all my Hypermax upgrades, I could tow more with my truck with 3.08's than the stock truck with 4.88's.

Think about it, the 3.55's will also load your motor much better.

 

[Mike]

4:10's really arent all that bad,,,thats what I am geared at in my F-350. I get between 16 and as high as 19 mpg not towing and never drop below 12 pulling hard. I dont think you'll get mileage like that towing with 3:55's and you might have trouble with EGT's too. But, if you dont tow then 3:55's are the ticket.

 

[hheynow]

Originally posted by 95_stroker
4:10's really arent all that bad,,,thats what I am geared at in my F-350. I get between 16 and as high as 19 mpg not towing and never drop below 12 pulling hard. I dont think you'll get mileage like that towing with 3:55's and you might have trouble with EGT's too. But, if you dont tow then 3:55's are the ticket.

I rarely tow and wish I had 3.55s. I get the same mileage as you do Mike, but have heard of guys with 3.55s getting 20+ mpgs consistantly.

 

[Duke]

Buddy of mine switched to 3.55's from 4.10's in his chipped 7.3L and thinks it's the best thing he's done to his truck. He tows a 13K gooseneck horsetrailer all over the country.

 

[BigStroker]

Originally posted by Duke
95 Stroker,

OK, I see what you mean.

Tell ya what TP, unless you're towing a monster trailer, you might want to put a 3.55 unit in the rear. I think the 3.55's or 3.73's are the best gears for these trucks. Your truck has so much torque already. There's no reason to go more than 3.73's on a diesel pick-up. You might find it to be cheaper to do the Sterling down to 3.55's rather than the D-60 up to 4.10's, anyway.

I had 4.88's in my 450 and they're awful. I switched to 4.30's. Better, but still too geared-down. With all my Hypermax upgrades, I could tow more with my truck with 3.08's than the stock truck with 4.88's.

Think about it, the 3.55's will also load your motor much better.

Here's the deal Duke.

The axle I am trying to pick up has 3:55's and my truck already has 4:10 gears in it. But with the 4:10 gears and 35" tires...mebbe soon to be 37's.....the 4:10 ratio it then reduced to that of a 3:73.

If I swapped out to 3:55 it would further reduce my ratio and wind up with alot less mpg than I have with 4:10's.

Besides I drive like a bat outta hell and I still get 12-16 with my 4:10's combined city and highway driving.

My crew cab with 3:55's gets 19-20

 

[Duke]

Ohhhh, I didn't realize you were running big tires. My bad.

4.10's would be great with 35-37's.

 

[ktpauley]

Quote from Duke, "A rear shop can do it for a reasonable cost." I thought a rear shop was a proctologist?

 

[stelectric]

keep the 4.10's