V2 Diff rebuild + Gear Ratio Swap

[maupineda]

To close the carrier I use the same method I used to open it, get to as close as I could, the. Zip tie it and use a hammer to tap the tool and lock it in place.


the final torque was a bit lower than what I expected, but it is very similar to how it was before, this makes me think the unit was still ok, also the clutches looked fine!


I was able to close the unit to where it was. I also shimmed the side gear with the play, and it is much reduced now that the unit is closed. I used 2 0.1mm shims with RC40 harness for durability.

Edit: took a photo of the carrier closed to the original position with it set screw to lock it.

[maupineda]

This is how I measured the pinion to confirm if I needed to change the depth shim, and by how much.

First I setup the pinion on a precision block, and align the micrometer so that I could have the exact same setup for both pinions, I started with the old one


I also rotated the pinion to verify the runout, it is incredible that the micrometer did not move at all as I spun the pinion.

Here is the original one



and here the new, same, no runout as I spun the pinion, they are cut exactly the same.



then it was all about getting the pinion into the carrier and adjust the preload





Edit: spent time in ISTA last night and reviewed the specs for e36 chassis, and found that the pinion preload should be 2.5nm or 250ncm. I will redo this as I fear I may have screwed up the process.

I also found the carrier preload values which are bearing brand dependent. Will add here.

K = kompact or small
M = medium
G = grob or large

[maupineda]

The carrier preload seems totally loose, so will need to adjust it and start the gear mesh setup from scratch

I hope it won’t be too difficult

Edit: false alarm, I just had to torque the side caps, it is 2nm of preload, which is about midway the spec.

i also gave the pinion a tad more preload to match the side and it is 2nm also.

base on all this I should have little trouble setting the gear mesh.

[bigjae46]

More info on that puller!

[maupineda]

More info on that puller!

This is the one. I bought the version with two cups (orange and black) the one with white adds another size option.

https://www.vevor.com/bearing-inner-race-tool-c_10331/vevor-carrier-pinion-bearing-puller-clamshell-bearing-puller-w-3-clamshells-p_010910863646?adp=gmc&srsltid=AfmBOopBbomOfyf47W0XA47J9-MiFlHlthWGnzUPBZ6FOHDrFtFYIhRkDRQ&gPromoCode=google202412&gQT=1

[bigjae46]

This is the one. I bought the version with two cups (orange and black) the one with white adds another size option.

https://www.vevor.com/bearing-inner-...le202412&gQT=1

F my life...where was this 3 years ago? lol

Just bought one.

[sapote]

1. so before closing the carrier I wanted to see if I could make the ring close to the original position, to my surprise it goes to the same place with and without clutches.
2.The carrier preload seems totally loose, so will need to adjust it and start the gear mesh setup from scratch

I hope it won’t be too difficult

Edit: false alarm, I just had to torque the side caps, it is 2nm of preload, which is about midway the spec.

1. I don't see the pump in the pics but assume you had it when tightening the ring; if no pump then I don't see how you know the locking ring is at its final position.
2. What side caps that affects the pinion bearing preload? The output flange bearings preload should not affect the pinion bearing preload.

[maupineda]

1. I don't see the pump in the pics but assume you had it when tightening the ring; if no pump then I don't see how you know the locking ring is at its final position.
2. What side caps that affects the pinion bearing preload? The output flange bearings preload should not affect the pinion bearing preload.

1. man, you should go back and check. I documented the ring was drilled and tapped before opening, that is how I know it went to its home position. Also there is a photo above.

2. Did not I say CARRIER? Not sure why you are inferring anything related to the pinion.

[sapote]

1. man, you should go back and check. I documented the ring was drilled and tapped before opening, that is how I know it went to its home position. Also there is a photo above.

2. Did not I say CARRIER? Not sure why you are inferring anything related to the pinion.

1. I was referring to your new post's pics showing the locking ring installed but no pump.
2. My bad.