'76 CJ5 T-18 transfer case/transmission shimming from factory? - JeepForum.com
 
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post #1 of 12 Old 11-03-2013, 10:37 AM Thread Starter
Grumpy_one
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'76 CJ5 T-18 transfer case/transmission shimming from factory?

From what I understand, CJ5's with factory t-18's were shimmed from the factory. Mine has shim's and a bar stock between the skidplate and the frame. I've had this jeep for over 26 years and I cant remember if I added anything to the skid plate when I did my lift umpteen years ago. I'd like to know what the factory shimming was. I've been told about an inch which is just about where it is right now. I was going to remove the shims due the fact that I'm going with a CV (double cardan) drive shaft in the rear, but being the t-18 is tall and will interfere with the tub, I'm guessing I'm just going to keep the shims in. This is what came out, can someone help me figure out if this looks like it came from the factory with shims and bar stock? Options for removing interference i.e. cutting tub were stick comes out. I don't really want to do this, I'd rather leave the shims in and deal with the inch of lowered skid plate, unless it can be done cleanly. I would like to hear from people that have dealt with this and what they did, thanks.

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post #2 of 12 Old 11-03-2013, 09:39 PM
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I wish a friend's CJ wasn't 100 miles away or I would take a picture of his. The bar stock is not present on his '78, it is just a stack of thin material.
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post #3 of 12 Old 11-04-2013, 04:25 PM
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Grumpy,

I tried to reply to your PM but got the error: "Grumpy_one has exceeded their stored private messages quota and cannot accept further messages until they clear some space"

PM me your email and the link you were referring to and I can help with your question.

1976 CJ7 - AMC 304
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post #4 of 12 Old 11-04-2013, 06:12 PM Thread Starter
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Cleared folder...
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post #5 of 12 Old 11-04-2013, 06:29 PM
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It appears you have a 5/8" bar and three (probably) 1/8" factory shims. The factory used 7 1/8" shims originally. It looks like if you used two 1/8" shims you would get back to the design intent. Use the 5/8" in addition to the two 1/8" shims.

Last edited by rrekr; 11-04-2013 at 06:31 PM. Reason: clarification
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post #6 of 12 Old 11-04-2013, 08:02 PM Thread Starter
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7 shims on each side?
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post #7 of 12 Old 11-04-2013, 08:16 PM
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You need 7/8" total on each side.
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post #8 of 12 Old 11-05-2013, 01:12 AM
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Grumpy,

I believe my T-19 has the same case dimensions as your T-18. If so, the only place it conflicts with the skid is at the drain plug.

I decided it was easier to notch the skid around the drain plug, instead of using shims.

Just an alternative to think about.....

Matt


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post #9 of 12 Old 11-05-2013, 08:45 AM Thread Starter
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Quote:
Originally Posted by Matt1981CJ7 View Post
Grumpy,

I believe my T-19 has the same case dimensions as your T-18. If so, the only place it conflicts with the skid is at the drain plug.

I decided it was easier to notch the skid around the drain plug, instead of using shims.

Just an alternative to think about.....

Matt
I thought it was tunnel interference due to how tall it is.
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post #10 of 12 Old 11-05-2013, 09:49 AM
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I'm not sure exactly why AMC shimmed the skid on T-18 equipped CJs. My T-19 fit nicely in the tunnel without shims.

Here's a pic before I notched the skid. As you can see, the trans case was sitting directly on the skid at the drain plug. This caused a slight vibration noise, which went away after I notched the skid.

Matt
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SkidMod4.jpg   SkidMod5.jpg   TransCover4.jpg  


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post #11 of 12 Old 11-05-2013, 10:58 AM
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The OP's skidplate is different, however, and was setup from the factory for the T18. He would have to redesign the trans mount to raise the skid against the frame and not have the transmission go upwards as a result.
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post #12 of 12 Old 11-05-2013, 12:56 PM
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CSP,

Good point. I forgot that the skid design changed a few times over the years.

Carry on. I'll shut up.

Matt


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