Thread:

G.M. Techs

2004 h.d. 3/4 ton with the duramax. i blew my rear diff. seal at the front of the housing. how hard is it to replace? filled up the fluid and it is just pouring out the front

gravy, just need a harmonic balancer puller to press off the pinion yoke.you can just use the ujoint strap bolts. check the seal on the back of it too, sometimes they melt and ya have to buy a new yoke

do you know what part #'s i need? the dealer out here is not the smartest

Originally Posted by slotracer

do you know what part #'s i need? the dealer out here is not the smartest

if you'll pm me the vin# of the truck i'll have my parts manager look it up for you in the mornin and give you the exact p# you need all the info we need is in the vin.

Originally Posted by IMPATIENT 1

if you'll pm me the vin# of the truck i'll have my parts manager look it up for you in the mornin and give you the exact p# you need all the info we need is in the vin.

you have a p.m.

Originally Posted by slotracer

you have a p.m.

cool i'll let ya know in the mornin

Make sure you put teflon sealer on the pinion spline, I have seen them leak down the splines and also clean the vent and hose !!!

Originally Posted by The Violater

Make sure you put teflon sealer on the pinion spline, I have seen them leak down the splines and also clean the vent and hose !!!

good advise

Originally Posted by IMPATIENT 1

good advise

will do

so i just got around to trying to do this. what socket do you use for the big a$$ nut that holds the balancer on?

yeah, take the big nut off and there's a washer behind it, a magnet will pull it out. use a harmonic balancer puller across the 2 ubolt clamp mounts and press against the pinion, the yoke will pop right off. only tighten the nut till it stops, don't keep hammering it with a impact gun or you'll crush the sleeve more and jack up clearences

ok back at it. got the driveline out of the way, now its timew for the big ass nut. what size socket do i need? if i have to buy one i want to make sure its the right size.

i think its a 1 1/4 , been awhile

Originally Posted by IMPATIENT 1

i think its a 1 1/4 , been awhile

its bigger. i have that size. but it looks like either a 9 point or 12 point, what ever it is.