C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Torque specs please for "bat wing"

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Old Apr 15, 2007 | 06:45 PM
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Default Torque specs please for "bat wing"

Can someone provide the rear torque specs for the rear bat-wing bolts that go into the differential; (disregard the avitar....C-4 1985 pumpkin).

Also, are there torque specs for the lower camber brackets? (the 4 lower bolts that go clear through the differential and bat wing)

Thanks!
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Old Apr 15, 2007 | 08:09 PM
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From: Lahaina Hi
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Which do you have D36 or 44?
D36 upper right is #1 above bat wing start point 19 ft pounds. 7&8 30 ft pounds.
D36
12345619lbs
7-830lbs

2 3 1

4 6

7 30 5 8 30 ftlbs




D44

4 5

3 1


7 2 6


1234530 lbs

6 7 35 lbs
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Old Apr 16, 2007 | 02:25 AM
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D-44
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Old Apr 16, 2007 | 02:26 AM
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
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No reason to use a torque wrench on these, IMO. Just tighten them evenly.
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Old Apr 16, 2007 | 02:26 AM
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D-44...

I've heard that "the right stuff" is the best for sealing the two pieces together. Is there anything better?

Also, what do you guys use on the threads? The blue sealant from locktite?
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Old Apr 16, 2007 | 02:34 AM
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
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Use the right stuff, it's the best RTV there is.

Also, I dimpled the aluminum surface with a punch and hammer to help keep the RTV from squirting out. My factory sealant washed right out of there when I put synthetic in.

Install the bolts dry, they don't seal anything.
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Old Apr 16, 2007 | 02:55 AM
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I have found that the bottom bolts bolts are the only ones that tend to leak.
I use the right stuff but I have found it doesn't realy matter.
The seal is so tight if you tq the bolts right they don't leak.
I have put my D44 with a spool through hell and it has never leaked.
You do need to tq the c-beam front to 49lbs and the rear to 59 lbs to make sure everything is secure.
I retq everything every 30 days and I have never broken a D 44.
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Old Apr 16, 2007 | 02:57 AM
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
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The bolts don't leak, the RTV near the bolt holes is thin, and leaks across into the bolt hole. Once it gets here, it will drip out no matter how much RTV you goop onto the bolt.
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