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Re: 3.45 Differential install

Posted: Thu Nov 10, 2016 12:19 pm
by No Moa
wow what a great thread. I spent many nights sifting through the CTS-V posts about rearend swaps (I just sold a 06 CTS-V with 31k miles on it) what a pain in the rear they were, but this looks pretty straight forward. And much easier to locate parts.

Re: 3.45 Differential install

Posted: Thu Dec 08, 2016 8:42 pm
by jackleg
Wohahaha- time for the winter time upgrades..

Re: 3.45 Differential install

Posted: Mon Apr 10, 2017 8:04 am
by jackleg
Finally have some time to work on the car. The driveshaft to rear end connection is the rubber fiber flex disc. Where the bolts go through the disc there are steel sleeves. The sleeves extend out from the disc and fit into recesses in the rear end yoke. The recesses in the rear end yoke on the Camaro diff have a bigger diameter then the Caprice. It all bolts up tight and the center pin seems to center every thing. Its just that before the bolts are tight there is some rotating play between the shaft and yoke. It looks like it's intended that sleeves are supposed to take the rotating force and the bolts hold it all together. With the larger recesses in the yoke it's maybe putting more stress on the bolts? Do I need a Camaro flex disc or will that not fit the Caprice driveshaft? Maybe it doesn't matter. Any one else had this issue?
Thanks

Re: 3.45 Differential install

Posted: Sat Jul 22, 2017 8:55 am
by hellhammer
I know this is a little old. Dowel rings are a more precise fit than bolts and together with the receiving counter-bores they handle the rotational load. The bolts keep the two mated together. In the case you described, there will be some shifting. A different bushing/dowel ring or if the Camaro flange can also be used that would be best.

Re: 3.45 Differential install

Posted: Sat Aug 12, 2017 2:14 pm
by wa9ray
Not sure where to ask this question but I have a 2014 ppv and was wanding if anyone knows if axles from any other cars will fit ? camaro,g8 ? I had a heck of a time getting the axle nut off and the threads look bad now so I want to replace it just don't want to give gm 433 dollars and change for theres, any help or advice would be great.

Thanks

Re: 3.45 Differential install

Posted: Tue Aug 15, 2017 10:28 am
by CrashTestDummy
So I need to ask, because I'm wondering if I should be concerned with the diff I have. It seems to have a bit of play when I turn the pinion yoke. I can turn it clockwise, and it'll turn the ring gear. If I stop, and turn it counter-clockwise, there's a bit of movement, probably a couple of degrees, before the ring gear turns. Is this normal? I think it is, but have never actually turned the driveshaft on our Caprice to see if there's similar 'play'. Thanks.

Re: 3.45 Differential install

Posted: Tue Aug 15, 2017 10:47 am
by kevink
CrashTestDummy wrote:So I need to ask, because I'm wondering if I should be concerned with the diff I have. It seems to have a bit of play when I turn the pinion yoke. I can turn it clockwise, and it'll turn the ring gear. If I stop, and turn it counter-clockwise, there's a bit of movement, probably a couple of degrees, before the ring gear turns. Is this normal? I think it is, but have never actually turned the driveshaft on our Caprice to see if there's similar 'play'. Thanks.
Yes, that's called backlash and it's required in all rears. Measuring it is pretty simple, but you need a dial indicator. Take off the rear cover and put the dial indicator on the ring gear. Hold the pinion still and rock the ring gear back and forth. The movement of the dial indicator is your backlash. I want to say that the Camaro rears are supposed to be somewhere around 0.007", but look up the spec to verify.

Re: 3.45 Differential install

Posted: Tue Aug 15, 2017 1:44 pm
by CrashTestDummy
Hmm, the pinion sure turns more than .007, and while I know it's different than measuring the ring gear, I guess I should pop the thing open and see.

Re: 3.45 Differential install

Posted: Tue Aug 15, 2017 7:46 pm
by Sanford
Gene,
The 2.92 differential looks like the rear cover acts as the carrier bearing caps. The split line is inline with the center of the bearings. If it is not noisy, nothing is leaking, I personally would not touch it except for an oil change. It looks like the other ratios have a cover that can be taken off. Just my 2 cents worth.

David

Re: 3.45 Differential install

Posted: Sat Jul 07, 2018 10:04 pm
by sardillim
question did the caprice axle's fit right into the Camaro diff?