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103779 Posts in 12188 Topics by 4700 Members
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Author Topic: 1968 rally sport  (Read 4516 times)
rat pack
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« Reply #15 on: March 18, 2011, 02:41:50 PM »

Simple test to do, just ground the tan sending unit wire coming from the dash but DO NOT use a test light, use a jumper wire, as you do not want a drop in the ohms going through the light. Turn the switch to ON, the gauge should peg past full. If it doesn't and drops, then the gauge is bad. If it pegs out past full then the sending unit is bad or has a bad ground. The 68 insturment cluster ground goes from the back of the cluster to the bright light indicator bulb housing then secures to the dash through the center screw in the top of the instrument carrier. See Section 12 Sheet B3 in the AIM for a picture of what this looks like and how it attaches................RatPack...............
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Just keep livin......L I V I N .............
clean68rs
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« Reply #16 on: March 18, 2011, 06:46:04 PM »

Thank you Rat Pack I took the dash out today and foud that with the testing I did the gauge shot past full. I am going to do it again using the jump wire. I have a feeling its the sending unit. I think I pulled down the fuse block for nothing looking for shorts what a pain oh well. Tanks again.
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clean68rs
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« Reply #17 on: March 19, 2011, 06:35:11 PM »

Hello RatPack.  I did the jump wire test today. With the ignition on, the needle shoots all the way past full. That being the case it would indicate that the sending unit is bad. This is the strange thing. When I turn off the ignition and turn on the head light switch the needle comes all the way back past empty. What's up with that? Some other issue? Thanks again for your help.
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rat pack
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« Reply #18 on: March 20, 2011, 12:34:17 PM »

Sounds like you have some ground issues and even maybe a bad printed circuit board.  I will shoot you an email later this evening. Right now I am going to go enjoy this 75 degree weather!.........RatPack............
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clean68rs
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« Reply #19 on: March 28, 2011, 09:29:21 AM »

Here are numbers I took off my 10 bolt rear end. I was wondering if you could tell me what they all mean. First  CON1  GM 62   3894859nf   pa 0102g2   970 writen on shaft.  Next  62  L157  The gear inside reads 2GM 3790629   12 37 I think the 1237 means the gear ratio not sure. Thanks for any info you can give me. Scott.
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Petes L48
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« Reply #20 on: March 28, 2011, 10:06:42 AM »

It should all be explained here, makes more sense if you read through it on your own:
http://www.camaros.org/drivetrain.shtml#axle

The 12 37 on the ring gear is the ratio - 37/12=3.08
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clean68rs
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« Reply #21 on: March 29, 2011, 05:45:17 PM »

Thanks for the info. Will be adding a locker at some point.
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clean68rs
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« Reply #22 on: March 30, 2011, 07:20:26 AM »

Hello rat pack, I drilled holes for the side  rallysport emblems and installed the barrel clips only to find out that the studs on the moldings are not long enough to grab inside the clip. That being the issue I welded up the holes. Theirs no way I can get to the inside to put these on. I was thinking of grinding off the studs and trying some kind of spay adhesive on the back side of them and testing them on the primerd panel.Can you let me know how you have installed these on your past projects. Thanks  Scott.
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clean68rs
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« Reply #23 on: April 03, 2011, 03:48:46 PM »

I used 3m super 77 adhesive on the back side of the moldings and it is going to work out great. It certainly beats drilling holes in the fenders and it will hold fine.I did this test on a piece of sheet stock sanded and primed.
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