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10/10/11 4:16pm - Original Message: 'cross member bushings'
78Frank
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Portsmouth, VA - USA

Vette(s):
1978 coupe in need of total restoration/modification

Joined: 10/2/2011
Posts: 13
Ive seen it referd to as  the batwing. The crossmember that the differential bolts to and the ends have bushings that rest/bolts to frame. How are these bushings removed from the crossmember? I want to replace with new. By the way its a 78. Thanks.

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10/10/11 7:33pm - Reply: 'Re: cross member bushings'
VetteCountry Lifetime Member
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Belvidere, IL - USA

Vette(s):
1977 Black T-Top ZZ4 5Sp 16in Wheels


Joined: 10/24/2004
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          We used some wd-40 for lub. Made a double wedge, much like a pickel fork. You can hammer it or weld shaft from a muffler chisel and use a burp gun. Come out fairly easily, leave bolts in to catch.

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10/10/11 7:58pm - Reply: 'Re: cross member bushings'
yostusota
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York, PA - USA

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1969 daytona conv. all original 350 350 380 4 sp w/air..and hard top

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I burned the last set out with a torch I did..but the air hammer would work fine also..I had more trouble separating the bushings from the frame..it's like they were welded on there..but it popped off ok..to do it at home would take some time..maybe a big hammer and chisel and work your way around until it pops loose..if you don't have the patience for that then most shops can get them out without much fuss.. Rich

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10/10/11 8:19pm - Reply: 'Re: cross member bushings'
corvette440hp Lifetime Member
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I used a hydraulic press to push them. After cleaning and painting, I then soaped up the new ones and pressed the new ones in.

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10/10/11 10:33pm - Reply: 'Re: cross member bushings'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

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'78 would NOT have a "batwing" style diff mount. It will have a "normal", steel crossmember. The bushings in those are held in by tabs that are bent over onto the crossmember. Bend the tabs back straight, soak the outer edge with penetrant(WD40, PB Blaster, etc), and you should be able to smack them out with a hammer(manual or air powered), or press them out with a press.

The '80-'82 diffs with the "batwing" mount are a bit more difficult, and may require some heat. There are tools available to remove/replace them but they can be removed without.


http://www.c3vr.com/member_pages/4401_4500/4427/diff1.JPG


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Joel Adams
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10/11/11 10:20am - Reply: 'Re: cross member bushings'
corvette440hp Lifetime Member
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Adams' Apple said: '78 would NOT have a "batwing" style diff mount. It will have a "normal", steel crossmember. The bushings in those are held in by tabs that are bent over onto the crossmember. Bend the tabs back straight, soak the outer edge with penetrant(WD40, PB Blaster, etc), and you should be able to smack them out with a hammer(manual or air powered), or press them out with a press.

The '80-'82 diffs with the "batwing" mount are a bit more difficult, and may require some heat. There are tools available to remove/replace them but they can be removed without.


http://www.c3vr.com/member_pages/4401_4500/4427/diff1.JPG

Joel I was wondering about the batwing term. I didn't realize that when GM went with Dana that the batwing term came into play. Also I forgot about the fun of the tabs in the removal and installation process. I bent them over somewhat on the new install, then used the press to totally bend them back. You always keep the information coming.........thanks!  

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10/11/11 5:25pm - Reply: 'Re: cross member bushings'
78Frank
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Portsmouth, VA - USA

Vette(s):
1978 coupe in need of total restoration/modification

Joined: 10/2/2011
Posts: 13
Thanks for the replys. I had no trouble removing crossmember from frame.(lucky I guess,the car sat for more than 15 yrs. Only 57k on od.) OK,. so bend up all the tabs,soak with penatrating oil and press them out. Looks like a steel sleeve around bushing, is that part of crossmember or bushing? Sorry for all the questions but this is my 1st vette and dont want to screw anything up. I saw the term "bat wing" in another post but didnt see any simularety. Great info on this site, Thanks again.

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10/13/11 10:35am - Reply: 'Re: cross member bushings'
corvette440hp Lifetime Member
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Frank, the steel is wrapped around the crossmember cushion.  It will push out. Just throw the old stuff away. When you get the new crossmember cushion, they will have the steel wrapped around the new rubber

|UPDATED|10/13/2011 7:35:25 AM (AZT)|/UPDATED|


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corvette440hp
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10/13/11 10:38am - Reply: 'Re: cross member bushings'
corvette440hp Lifetime Member
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Frank on the bottom side I added this...........I would recommend it...............

|UPDATED|10/13/2011 7:38:28 AM (AZT)|/UPDATED|


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10/11/11 10:31pm - Reply: 'Re: cross member bushings'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19449
Ask any and all questions you may have...we're here to help! Thumbs Up  Everyone here learned by doing, and from having someone's help. It's a lot easier to work on/repair/restore one of these gems when you know you have someone that has already been there helping with info. 

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Joel Adams
C3VR Lifetime Member #56    
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             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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10/12/11 4:26pm - Reply: 'Re: cross member bushings'
78Frank
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Portsmouth, VA - USA

Vette(s):
1978 coupe in need of total restoration/modification

Joined: 10/2/2011
Posts: 13
I will add that kit, looks like it would strengthin it up some with the studs and large washers. Thanks,many questions and pics to follow.

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10/13/11 10:40am - Reply: 'Re: cross member bushings'
corvette440hp Lifetime Member
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Hear is another product for stabilizing your rear cross member. Removal of the cross member is required in order to install these items. If you are doing a some heavy wrenching anyway now would be a good time to install this low dollar up grade.                                                  

Cross Member Tabs____________$11.95






|UPDATED|10/13/2011 7:40:05 AM (AZT)|/UPDATED|


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corvette440hp
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10/13/11 10:41am - Reply: 'Re: cross member bushings'
corvette440hp Lifetime Member
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 here is how they mount.

|UPDATED|10/13/2011 7:41:32 AM (AZT)|/UPDATED|


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10/13/11 1:19pm - Reply: 'Re: cross member bushings'
Adams' Apple Lifetime Member
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Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 19449
Wow Larry...I've never seen that particular upgrade. Kewl. Then again, I've never seen or heard of anyone ripping ou the holes in the crossmember, either! LOL  I guess it wouldn't hert to have them, anyway. Thumbs Up

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Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
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10/13/11 1:29pm - Reply: 'Re: cross member bushings'
corvette440hp Lifetime Member
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Adams' Apple said: Wow Larry...I've never seen that particular upgrade. Kewl. Then again, I've never seen or heard of anyone ripping ou the holes in the crossmember, either! LOL  I guess it wouldn't hert to have them, anyway. Thumbs Up

Joel they're a cheap upgrade......$12.00...........Anything that can strengthen stuff I'm all for. I even istalled aircraft grade yokes in the rear axle...............Manufactured From Aircraft Quality Steel
  • Drop Forged For Extra Strength & Heat Treated


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    corvette440hp
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    10/15/11 9:13am - Reply: 'Re: cross member bushings'
    78Frank
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    Portsmouth, VA - USA

    Vette(s):
    1978 coupe in need of total restoration/modification

    Joined: 10/2/2011
    Posts: 13
    Where can I get the bushing and center mount upgrade kits

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    10/16/11 8:13am - Reply: 'Re: cross member bushings'
    corvette440hp Lifetime Member
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    78Frank said: Where can I get the bushing and center mount upgrade kits
    Frank here is a link for your bushings..............

    http://www.ecklerscorvette.com/corvette-crossmember-cushions-rear-1963-1979.html



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    corvette440hp
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    10/16/11 8:17am - Reply: 'Re: cross member bushings'
    corvette440hp Lifetime Member
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    Frank, here is a link for the center mount locating kit............................................................. 

    http://www.ecklerscorvette.com/corvette-rear-suspension-locating-kit-1963-1979.html



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    corvette440hp
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    10/16/11 8:27am - Reply: 'Re: cross member bushings'
    corvette440hp Lifetime Member
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    Here is something else that I put on Carbon Fiber half shafts.

    |UPDATED|10/16/2011 5:27:17 AM (AZT)|/UPDATED|


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    corvette440hp
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