Future Diff swap to 3.27

Drivetrain discussion including Transmission, Differential, Driveshaft, and related items.
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Fudgehog
Posts: 160
Joined: Sat Aug 19, 2017 7:08 am
Location: Wisconsin

Future Diff swap to 3.27

Post by Fudgehog » Wed Aug 01, 2018 6:49 am

Hey the information on here from other members swaps is great. Planning on doing this mid August over a weekend.

I'm looking for
Hints/tips
Parts I should order (besides outer axle seal - possibly center support and of course bushing upgrades)
Recommendation for email tune
Is a tunnel brace worth the cost?
Anything else that could aide me

All is appreciated thanks guys.
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03 Silveraydo 4.8L
13 Caprice 6.0L

xcidmigs
Posts: 679
Joined: Sat Feb 14, 2015 2:12 am
Location: SE PA

Re: Future Diff swap to 3.27

Post by xcidmigs » Wed Aug 01, 2018 5:47 pm

You have a factory tunnel brace, I bought the BMR one and while it looks impressive I could feel no difference in the cars rigidity.

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Fudgehog
Posts: 160
Joined: Sat Aug 19, 2017 7:08 am
Location: Wisconsin

Re: Future Diff swap to 3.27

Post by Fudgehog » Wed Aug 01, 2018 5:49 pm

Thanks that's what I was looking for. I'll invest in a different suspension part then.
03 Silveraydo 4.8L
13 Caprice 6.0L

CrashTestDummy
Posts: 1719
Joined: Sat Feb 07, 2015 8:31 pm
Location: Pearland, Texas

Re: Future Diff swap to 3.27

Post by CrashTestDummy » Wed Aug 01, 2018 8:06 pm

how much 'slop' do you have in the pinion? I mean how much can you turn it before you feel it starts spinning the ring gear? Then, how much before you feel it roll the ring gear back the other way?

You going to do a WIP in the member builds area?
Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2010 Tahoe PPV (her car)
1995 DGGM Impala SS
1996 BBB Impala SS (11-second DD)
1985 Firebird - 310 LS1 C Prepared autocross car.
And some others
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Fudgehog
Posts: 160
Joined: Sat Aug 19, 2017 7:08 am
Location: Wisconsin

Re: Future Diff swap to 3.27

Post by Fudgehog » Wed Aug 01, 2018 8:18 pm

I don't even know if I have any slop to be honest. I thought it would be a good idea to change the center support and I'm doing the diff upgrade for obvious reasons. Haven't had time to jack it up and test it out I probably won't until mid August weekend.

I could take some pictures along the way, especially if it helps out other members.
03 Silveraydo 4.8L
13 Caprice 6.0L

CrashTestDummy
Posts: 1719
Joined: Sat Feb 07, 2015 8:31 pm
Location: Pearland, Texas

Re: Future Diff swap to 3.27

Post by CrashTestDummy » Wed Aug 01, 2018 9:47 pm

Fudgehog wrote:I don't even know if I have any slop to be honest. I thought it would be a good idea to change the center support and I'm doing the diff upgrade for obvious reasons. Haven't had time to jack it up and test it out I probably won't until mid August weekend.
I was talking about the 3.27 diff. Thanks.

Fudgehog wrote:I could take some pictures along the way, especially if it helps out other members.
I don't think it can hurt at all. We have some good WIPs for diff swaps on this forum, but it seems like just about every car is a bit different, so 'living vicariously' through your WIP can't be a bad thing. :mrgreen:
Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2010 Tahoe PPV (her car)
1995 DGGM Impala SS
1996 BBB Impala SS (11-second DD)
1985 Firebird - 310 LS1 C Prepared autocross car.
And some others
Do YOU have my SPID?

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Fudgehog
Posts: 160
Joined: Sat Aug 19, 2017 7:08 am
Location: Wisconsin

Re: Future Diff swap to 3.27

Post by Fudgehog » Wed Aug 01, 2018 9:58 pm

I can let you know how the gears feel when I get it delivered lol. Off like a 50,000 mile or so Camaro. Definitely can't wait to see it but judging by the pictures it looks good.
03 Silveraydo 4.8L
13 Caprice 6.0L

CrashTestDummy
Posts: 1719
Joined: Sat Feb 07, 2015 8:31 pm
Location: Pearland, Texas

Re: Future Diff swap to 3.27

Post by CrashTestDummy » Thu Aug 02, 2018 2:22 pm

Cool. I ask because I have a 3.27 that came out of a low-mile Camaro, but spent some time under a low-mile G8. I haven't compared the lash in the 3.27 with that on the factory diff under the car now, but it seems a bit excessive to me. I'll compare when (if) I ever get time to get the new exhaust under the car.

I'll still probably get the 3.27 gone through, just because it's out of the car. It does turn smoothly, it just seems a bit loose.
Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2010 Tahoe PPV (her car)
1995 DGGM Impala SS
1996 BBB Impala SS (11-second DD)
1985 Firebird - 310 LS1 C Prepared autocross car.
And some others
Do YOU have my SPID?

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Fudgehog
Posts: 160
Joined: Sat Aug 19, 2017 7:08 am
Location: Wisconsin

Re: Future Diff swap to 3.27

Post by Fudgehog » Thu Aug 02, 2018 3:42 pm

Just got it delivered. Between moving the pinion left and right there's no play for me.
03 Silveraydo 4.8L
13 Caprice 6.0L

CrashTestDummy
Posts: 1719
Joined: Sat Feb 07, 2015 8:31 pm
Location: Pearland, Texas

Re: Future Diff swap to 3.27

Post by CrashTestDummy » Thu Aug 02, 2018 6:44 pm

Sigh. That was what I was afraid of.
Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2010 Tahoe PPV (her car)
1995 DGGM Impala SS
1996 BBB Impala SS (11-second DD)
1985 Firebird - 310 LS1 C Prepared autocross car.
And some others
Do YOU have my SPID?

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