CurleyMan
04-13-2008, 11:11 AM
So I have seen at least a dozen buggies now running dana 44's and 5.39's. It has been driving me nuts because I thought it was just a show truck gear ratio for the Dana 44. The rigs are running 38 or larger tires and some are in competition others are professionally built.
Dana 44 5.13's 8 pinion gear teeth 41 ring gear teeth
Dana 44 5.89's 9 pinion gear teeth 53 ring gear teeth
http://www.roc-spicer.com.tw/roc/products.htm
Since tooth contact (surface area) has alot to do with gear strength It may be that 5.89's are stronger then the 5.13's in my truck right now. It is driving me nuts cause the HP front axle and 14 bolt i'd like to place under my truck cannot be geared past 5.38.. I have checked as many forums on the subject as possible and it seems as if no-one has broken a set of 5.89's yet. Randy's ring and pinion (yukon) has had no reported issues with the gear set either... I have recently aquired a set of 39.5 Iroks which will be used in Moab my truck was under geared for the 37's and it's gonna suck using 5.13's with the 39.5's.
According to the www.4lo.com Calculator I should be using a ratio in the area of 6.0 and can go as high as the rockwell 6.73 IIRC. Does anyone have thoughts on this subject cause I can't find a reason not to try it out...
Dana 44 5.13's 8 pinion gear teeth 41 ring gear teeth
Dana 44 5.89's 9 pinion gear teeth 53 ring gear teeth
http://www.roc-spicer.com.tw/roc/products.htm
Since tooth contact (surface area) has alot to do with gear strength It may be that 5.89's are stronger then the 5.13's in my truck right now. It is driving me nuts cause the HP front axle and 14 bolt i'd like to place under my truck cannot be geared past 5.38.. I have checked as many forums on the subject as possible and it seems as if no-one has broken a set of 5.89's yet. Randy's ring and pinion (yukon) has had no reported issues with the gear set either... I have recently aquired a set of 39.5 Iroks which will be used in Moab my truck was under geared for the 37's and it's gonna suck using 5.13's with the 39.5's.
According to the www.4lo.com Calculator I should be using a ratio in the area of 6.0 and can go as high as the rockwell 6.73 IIRC. Does anyone have thoughts on this subject cause I can't find a reason not to try it out...