bobo Posted May 25, 2013 Share Posted May 25, 2013 would it be worth it to change out my 4.33 to 4.17? '00 Rb 460 18 eaton. the rears are on hendrickson rubber block. my Rw has 4.42(camelback), if i could I'd put the 4.33 in it. any help is appreciated. try to decide to buy new truck or spend some momey on old Rb? Bobo Quote Link to comment Share on other sites More sharing options...
Superdog Posted May 25, 2013 Share Posted May 25, 2013 Are you wanting to swap from eaton to Mack? Mack never made a 4:33.That would no doubt be worth the work and $,but you won't see much as far as speed gained if that's what you are looking for. Quote Link to comment Share on other sites More sharing options...
bobo Posted May 25, 2013 Author Share Posted May 25, 2013 my bad your right 4.35 202/203 is what i have. no im not really looking for speed but rpm drop.my next step would be 3.94? i wouldnt be upset if i had to change it eatons. im a little dumb when it comes to diff's Quote Link to comment Share on other sites More sharing options...
oilburner Posted May 26, 2013 Share Posted May 26, 2013 I not sure what your using the truck for but 4.17 with a mack 13 speed and low pro 24.5 will get you 80 mph at 1900, in the ch I ran, so the eaton 18 speed would be about 2100 at 80 I thank with low pro 24.5, I belive the mack tranny has a bigger overdrive than the eaton. Quote Link to comment Share on other sites More sharing options...
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