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Corvette
C3 Forum
Differential Overhaul and Winter Projects
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<blockquote data-quote="Jr. Corvette" data-source="post: 192759" data-attributes="member: 1906"><p>Hey guys,</p><p></p><p>More updates on the differential. I got the differential mount back from being powder coated and I'm very happy with how it turned out. I also got the flanges and half shafts back from the driveline shop but I don't have pictures of it yet.</p><p></p><p>I got the carrier back from a machinist that lives just a few doors down from me. He took it to his work and machined the case axle openings slightly bigger for the bigger 30 spline Tom's axles. I finished polishing and radiusing the carrier then started the rebuilding it, adding better solid steel clutches and the new 30 spline gears and spiders. I got the clutches shimmed then added the factory 200lb springs. I had the option to leave the springs out, go with 200's or 400's, so I chose the happy medium. Next I installed the new 3.90 ring gear with ARP bolts, then installed the bearings.</p><p></p><p>On the differential housing I had to drill out the gear side bear cap holes and re-tap them for bigger 1/2 bolts for a stronger steel cap. Once that was done I installed the pinion races and then began the long process of shimming the pinion. I decided to go with a solid spacer over the crush spacer as it has a few benefits. Once I got the pinion setup for 22inlbs of rotational force I had to check and shim to achieve the right pinion depth. Got that all done so it's time to install the new carrier. I installed it using the factory case shims and it was spot on. I could run between 0.007"-0.009" of backlash and I had 0.008". Checked the pattern and I'm very happy with it. It's fairly centered and slightly favors the heel of the gear, but as more power is applied it actually will crawl up towards the toe, so favoring the heel is desired.</p><p></p><p>Just have to install the side bearings and seals. Then I'll just be waiting for the new pinion flange to get back from being powder coated as my old flange had a crack in it. Then I can put the differential back in and start to install the custom upper struts!</p><p></p><p>I got a new phone so these are all of the pictures I can get to upload. I will add more soon.</p></blockquote><p></p>
[QUOTE="Jr. Corvette, post: 192759, member: 1906"] Hey guys, More updates on the differential. I got the differential mount back from being powder coated and I'm very happy with how it turned out. I also got the flanges and half shafts back from the driveline shop but I don't have pictures of it yet. I got the carrier back from a machinist that lives just a few doors down from me. He took it to his work and machined the case axle openings slightly bigger for the bigger 30 spline Tom's axles. I finished polishing and radiusing the carrier then started the rebuilding it, adding better solid steel clutches and the new 30 spline gears and spiders. I got the clutches shimmed then added the factory 200lb springs. I had the option to leave the springs out, go with 200's or 400's, so I chose the happy medium. Next I installed the new 3.90 ring gear with ARP bolts, then installed the bearings. On the differential housing I had to drill out the gear side bear cap holes and re-tap them for bigger 1/2 bolts for a stronger steel cap. Once that was done I installed the pinion races and then began the long process of shimming the pinion. I decided to go with a solid spacer over the crush spacer as it has a few benefits. Once I got the pinion setup for 22inlbs of rotational force I had to check and shim to achieve the right pinion depth. Got that all done so it's time to install the new carrier. I installed it using the factory case shims and it was spot on. I could run between 0.007"-0.009" of backlash and I had 0.008". Checked the pattern and I'm very happy with it. It's fairly centered and slightly favors the heel of the gear, but as more power is applied it actually will crawl up towards the toe, so favoring the heel is desired. Just have to install the side bearings and seals. Then I'll just be waiting for the new pinion flange to get back from being powder coated as my old flange had a crack in it. Then I can put the differential back in and start to install the custom upper struts! I got a new phone so these are all of the pictures I can get to upload. I will add more soon. [/QUOTE]
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Corvette
C3 Forum
Differential Overhaul and Winter Projects
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