Bighorn A/T Transmission mod anyone??

[dinocol]

Hi, Does anyone here knows how to modify an isuzu bighorn automatic transmission so that it shifts sooner? like by adding additional switches? they have this power button which makes it shift at a much later rpm, maybe someone here knows how to do the opposite.. thanks.

[3kings]

i have a bighorn before and im contented with what it has.
if i may ask why do you need to shift it sooner?
if its diesel and automatic then nothing much we can do on instant acceleration.
a gas variant with manual transmission will solve that acceleration especially during overtaking.

[dinocol]

well... i just feel that there are times it shifts late.. hehehe its more of an experiment if it will perform better.. ala ako masyado gnagawa ngayon so im fidling and trying to improve it..

[3kings]

actually ganun din ang feel ko dati pero nung pinacheck ko sa may automatic transmission shop sa may visayas ave. ok naman pinalubricate ko lang, ganu lang talaga kasi ang kaha nyan bighorn makapal at mabigat compare mo sa trooper nagyon

[attic_dude]

hmmm, at what rpm does your bighorn shift? we have a bighorn also and i notice the same thing. usually sa 3k rpm siya nag shi shift.

[dinocol]

mga around 2k kng light driving pero pag medyo nagmamadali, umaabot dn ng 3k.. un nagiging prob k is parang d nya mahanap un tamang gear.. it shifts back and forth when running at high speeds.. or may mga times naman na ayaw nya magshift, parang stuck cya dun.. anyway, i usually pressdown hard then release suddenly then press again softly for it to shift... usually it works, pero may times na ayaw..

[3kings]

i think ganun talaga yun. ako i just step on the acc pedal smoothly and constantly kaya normal ang auto switching nya

[attic_dude]

mga around 2k kng light driving pero pag medyo nagmamadali, umaabot dn ng 3k.. un nagiging prob k is parang d nya mahanap un tamang gear.. it shifts back and forth when running at high speeds.. or may mga times naman na ayaw nya magshift, parang stuck cya dun.. anyway, i usually pressdown hard then release suddenly then press again softly for it to shift... usually it works, pero may times na ayaw..

we have exactly the same problem!!!! sa wakas may nahanap na rin akong kaparehas ko. ganun na ganun yung symptoms ko. lahat ng sinabi mo ganyan din sa akin. regularly naman ako nag rereplace ng atf fluid. pero there are rare occassions (again, very rare!!!) where the car runs fine, usually sa gabi to, kahit anong tapak ko nag shishift siya ng tama, di na stre stress yung transmission.

balak ko nga dalin k joseph para ma inspect and hopefully once and for all maayos din yung problem na to.

any diesel a/t engine experts out there, please feel free to comment on our problem, thanks.