33" or back to 31" concerning reliability

[pilgrim]

Hi all what do you think about best tire size for hilux concerning reliability?

I've used to drive BFGoodrich AT 245x75R16 for almost 40.000 km ... and now almost 10.000 km maybe a bit less on BFGoodrich MT KM2 255x85R16 ... once start using it I've noticed that it start affect gearing a bit ... but not much ...

at the beginning of this summer my right oil seal start leaking oil ... official toyota service have changed it without changing the bearing and in 2 months new oil seal have start leaking again ... have bought all spare parts and today gave car to my friend's service to fix it ...

have talked with him and he think that probably bearing have died so quickly because of 33" tire ... so now I'm thinking ... maybe would be better to sacrifice clearance and move back from 33" to 31" ...

any thoughts?

[Blackdelux]

hi
mine leaked after bearing change, never leaked before
are you running any lockers had similar problem, ended up being slight twist in shaft ( so toyota thought)
they changed carrier ,bearing and shaft to fix problem
im only running 265/65/17 less than 31inch

[pilgrim]

no lockers ... only LSD in rear diff ...

in official toyota service they told be that toyota have released new version of oil seal ..
as they told me in my hilux used to be installed 90311-T0035 ... and new oil seal number is 90311-47023 ...
they have installed me new one without changing bearing and in few months it start leaking again.

currently I've bought 90311-47013 ... in shop they told me that it's almost the same ... they didn't found 90311-47023

[Blackdelux]

im not sure what seals they put in but untill they changed carrier and shaft kept leaking

[pilgrim]

so interesting what have caused death of bearing ... 33" tires ... some defect ... or maybe mud ... maybe it would die even on 31" ... that's why I've wrote here ... interesting if any one else had such problem.