373 to 410

[grant1]

Whats involved? do you just change the ring and pinion or is there more to it?

Thanks

grant1

 

[BHolm]

Thats about it. I would replace bearings while it was apart too if you have some miles on it. Of course, I don't mean it to sound like it is something anybody could do in their driveway. It is a bit of work and the gears need to be set up right or you will have a howl.

 

[WoodChuck]

Thats about it. I would replace bearings while it was apart too if you have some miles on it. Of course, I don't mean it to sound like it is something anybody could do in their driveway. It is a bit of work and the gears need to be set up right or you will have a howl.

And premature failure.

 

[robertyoke]

you have to get a bearing/shim/seal kit to do it right. first pinion depth has to set then the backlash. its not that hard but it is time consuming.





has aam come out with any thing steeper like 4. 56 or 4. 88's for the 11. 5 rear and front diffrential?

just dont think it would be worth the trouble and cost for 3. 73 to 4. 10 swap.

-robert

 

[Grizzly]

Include you signature. Tell us something about your truck and what you do with it that you feel you need the 4:10.

 

[grant1]

Include you signature. Tell us something about your truck and what you do with it that you feel you need the 4:10.

TRUCK SIG. ON THE WAY 04 HO 6 speed bone stock, Pull 14k 5th. wheel

 

[BGlidewell]

dont you have to break in the new gears too? "lap them in"?

 

[BHolm]

dont you have to break in the new gears too? "lap them in"?

That is a very good suggestion. The custom Moser 12 bolt I bought for my Buick suggested a 30 minute run time on the hoist followed by a fluid change. They were good to go then. I have no idea what the factory does, or if is really necessary. I did it once, no problems.

 

[hdtrukn]

hook up your 5-ver TT ? and head down to Fl. We could swap yours for mine.

Would love to drop a couple hundred rpm @ cruise. 80mph is 2500rpm

Scott

 

[BHolm]

hook up your 5-ver TT ? and head down to Fl. We could swap yours for mine.

Would love to drop a couple hundred rpm @ cruise. 80mph is 2500rpm

Scott

I'd just swap the whole axle in a case like that. Diff gears are a PIA, I'd rather pull the whole axle out.

 

[WoodChuck]

dont you have to break in the new gears too? "lap them in"?

Break in is required of all new gearsets even on a brand new truck. Check out Randy's Ring and Pinion for info.

 

[betterthanstock]

TRUCK SIG. ON THE WAY 04 HO 6 speed bone stock, Pull 14k 5th. wheel

I don't think you need 4. 10 with the 6 speed, if you stay with the stock tire size. Downshift to 5th on hills, and keep going. Fifth is a lot stronger than sixth in that transmission. You can put in bigger injectors with the money you want to swap gears with.

 

[JHardwick]

I'd just swap the whole axle in a case like that. Diff gears are a PIA, I'd rather pull the whole axle out.

Truer words were never spoken!



Gear swaps aren't hard, just a lot checking and adjusting.

 

[JHardwick]

I don't think you need 4. 10 with the 6 speed, if you stay with the stock tire size. Downshift to 5th on hills, and keep going. Fifth is a lot stronger than sixth in that transmission. You can put in bigger injectors with the money you want to swap gears with.

I like the 4:10 and NV5600 combination, although I agree that it's not a combination for everybody.

 

[wgood]

I made the switch from 3. 73 to 4. 10 about 14 months ago and I'm glad I did. I'm very pleased with the additional towing power. However, I tow more weight than you do. We are full-time RVers and tow a fiver weighing between 17 and 17. 5K. My GVCW is usually between 25K and 26K and the truck does a great job. I haven't noticed significant change in mileage. We get around 10 to 10. 5 towing and 17 to 20 solo depending on the kind of driving we are doing.



Bill

 

[JHardwick]

I made the switch from 3. 73 to 4. 10 about 14 months ago and I'm glad I did. I'm very pleased with the additional towing power. However, I tow more weight than you do. We are full-time RVers and tow a fiver weighing between 17 and 17. 5K. My GVCW is usually between 25K and 26K and the truck does a great job. I haven't noticed significant change in mileage. We get around 10 to 10. 5 towing and 17 to 20 solo depending on the kind of driving we are doing.



Bill

Did you find any increase in mileage while loaded?

 

[wgood]

JHardwick, No. I didn't note a significant change up or down.

 

[JHardwick]

Yeah, I would have never expected a decrease, but maybe a few points of an increase.

I know that my truck HATES winter fuel! I get a solid 1mgh decrease on winter fuel.

 

[NDanecker]

When going from 3. 73 to 4. 10 don't forget the spacer ring between the ring gear and carrier. Its about 3/32" or 1/4" thick.



Gear setups are very easy, imo once you know how and have the correct tools.



But again it needs to be setup correctly or they'll wear our quickly and howl. The AAM axles don't require shims for the carrier which makes preload a snap.