removal of front diff

[3258]

I have this 4.2 and I need to remove the front diff, only I am slightly retarded and dont have a manual for this, I don’t even have a trailblazer anymore I just want to remove the diff to get rid of it. I have removed all of the bolts going into the oil pan and it does not want to come off, I refrained from applying excessive force as to not break something. I think I am missing something or is there a trick I do not know. Any advice is appreciated. thanks

 

[The_Roadie]

When all else fails, what's left besides excessive force? Penetrating oil on the interface may work in a day or two if they're corroded together.

 

[meerschm]

so why do you still have the motor? what is the plan, will we see a 4.2 powered snowblower soon? or is this destined to be a coffee table?

 

[3258]

When all else fails, what's left besides excessive force? Penetrating oil on the interface may work in a day or two if they're corroded together.

Ha, well i figured there was some secret trick, i used a pry bar a bit and it did not budge, figured you had to say a special chant and do a heel click or something.... I guess a big hammer it is!

 

[3258]

so why do you still have the motor? what is the plan, will we see a 4.2 powered snowblower soon? or is this destined to be a coffee table?

well.... I have 2 backups for the 1 i have in a car..... yes car. I plan to break 1 or 2

 

[jimmyjam]

i'd guess a pipe through the axle tunnel, try to tap it out

 

[Regulator]

Have you removed the spline disconnect from the passenger side and pulled the intermediate shaft out?

 

[The_Roadie]

A splined disconnect in good shape is worth as much as a used diff.

 

[3258]

Have you removed the spline disconnect from the passenger side and pulled the intermediate shaft out?

the disconnect is missing but there is a splined shaft, have not tried to remove it yet

- - - Updated - - -

Have you removed the spline disconnect from the passenger side and pulled the intermediate shaft out?

wish i had it, not sure i will even be able to get rid of this diff, not sure which one it is

 

[bravad'oh]

You are only missing HALF of the disconnect. The piece that is there will just pry off but you do want to be careful. Pry a little at a time in at least two opposite spots. I imagine the diff will come off the same way.

 

[3258]

yesterday i pulled that sprocket off and i threaded a bolt into the splined shaft inside the pan, the shaft still did not want to come out and i tried again to pry the diff off but it did not budge or even try to move, there is something i am missing, i just downloaded the manual and will see if it gives a diagram

 

[bravad'oh]

You should look at some of the front disconnect repair threads. They will show you how to get that off but I can see from your pic that all of the bolts that hold it on are removed. It is now only being held in by the friction fit. They also corrode a bit which makes them a little tougher to get out. Just get a bar in behind there and work it off. Like The Roadie said, some penetrating oil might help and even a little heat.

 

[3258]

I did get this off, it does take a fair amount of force, wedges etc. Now i have to try and figure out what the gear ratio is, it may have to be torn apart.....

 

[The_Roadie]

Gear ratio can be observed by rotating the input ten times, let's say, and seeing how many times the output turns. Make sure both outputs turn together so you aren't rotating the spider gears as well, or else you have to compensate for the carrier action.

 

[3258]

I had tried that when it was on the engine but it was not working out, (ie the spiders were rotating and stuff wasnt adding up or consistent ) now that i have it out i was thinking if i put the axel into the pass side.... will I get a direct correlation on the side that does turn? Sorry, i am more familiar with spools and lockers

 

[The_Roadie]

If you insert an axle and hold it from rotating, the other side will spin twice as fast.