2nd Gen Non-Engine/Transmission dana 80 355 ratio ?S

[JLittle]

I have a 2000 dually with a 4. 10 rear diff with limited spin, I would like to install a 355 or 373 ratio , will this bolt on my original carrier? I have been told yes by some and no by others? I was also told that a Ford dually 373 would bolt right up to my carrier too? if anyone can help, I would really appreciate it!

 

[Wiredawg]

Don't know, but...

I would go with a 3:55. I had an 00 2500 w/ 3:55 and it pulled my 17K lb 5th wheel fine. I traded it for 02 3500 w/ 4:10s pulls fine, but I run empty a lot and get about 2 -3 mpg less.



Oh, BTW: you need another carrier for 3:55 (I've been told). Don't know about 3:73s, but you won't get enough difference IMHO to justify that little change.



My centovos,



Wiredawg

 

[24Vpirate]

they make thin 3. 73 for your 4. 10 carrier. but if you want 3. 55 then you need a new posi case and put your internals into it. the change will drop you 500 RPMs when driveingthe 3. 73 will only dropyou 250 rpms

 

[inarush76]

Is there a way to put a 3. 73 on a 3. 55 posi carrier in a dana 70? Also the same in a dana 80? TIA

James

 

[Ram4Sam]

new gears...

J, why don't you look for a whole rear end from an 01. 5-02 wrecked dually. You can get 3. 54's and disc brakes to boot.



Sam

 

[pwknapp]

I can't wait to get some 3. 55's stuffed in my dually. Between fuel prices and the 4. 10's it takes some of the fun out of the long runs.