HELP -- My Front Driveshaft is Hitting the Transmission Crossmember!?!? - JeepForum.com
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post #1 of 27 Old 06-11-2010, 12:41 AM Thread Starter
AZJeepNewbie
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HELP -- My Front Driveshaft is Hitting the Transmission Crossmember!?!?

So I think I've tracked down this strange noise I sometimes get while wheeling in bigger rocks. Evidently my front driveshaft rubs on my crossmember when the axle is drooped. Here are some pics.

I've jacked up the front of the car by the driver's side frame rail to let the axle droop. You should be able to see where the driveshaft has been hitting the cross-member, and it's just about touching right now.



Closeup


Anybody know why this is happening, and how I should address it?
Build info is in my sig.

Thanks for any info!!


2005 Rubicon, Currie JJ SA lift with AEV 3" springs.
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post #2 of 27 Old 06-11-2010, 12:49 AM
Red_
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Are you lifted? It shouldn't hit under normal circumstances
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post #3 of 27 Old 06-11-2010, 12:50 AM Thread Starter
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Lifted 3". Just installed it a couple of weeks ago.

2005 Rubicon, Currie JJ SA lift with AEV 3" springs.
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post #4 of 27 Old 06-11-2010, 12:53 AM
bojang
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Looks like a transmission skid plate mount to me. You can probably take it off till you find something better to replace it. Like the one from skid row or something.

Chris

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post #5 of 27 Old 06-11-2010, 01:02 AM Thread Starter
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Yeah, you're right. It's just the skid plate mount. I guess I could grind it to add some clearance. But, I'm wondering why I haven't heard of folks having this problem before.

Thanks!

2005 Rubicon, Currie JJ SA lift with AEV 3" springs.
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post #6 of 27 Old 06-11-2010, 03:43 AM
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Looks like a crappy design to me. My 97 has no issues, even with a tummy tuck. Of course, my engine/trans skid is nowhere near the driveshafty and doesn't cross frame rail to frame rail.


Anyways, yours hits due to the greater droop available with the lift.

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post #7 of 27 Old 06-11-2010, 04:05 AM
chmo
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This is a common problem with lifted wranglers with auto tranny and OE tranny skid.
There is a write up in the net (link not at hand) of how to modify the crossmember for driveshaft clearance.
This crossmember is NOT carrying anything else besides the skid it self and of course should be strong enough not to bend if you put your Jeep on its belly .

So what the mod actually does is cutting the crossmember and welding in a reverse U which goes above the DS. Simple hack and weld job with the right measurements and some black rustoleum paint.

(If you can do it for cheaper than buying a skidrow tranny/engine skid which covers the oil pan as well and mounts to the OE transfer case skid )

cheers
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post #8 of 27 Old 06-11-2010, 04:42 AM
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or for now you can just cut off that side, mine was like that for a while.

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post #9 of 27 Old 06-11-2010, 04:59 AM
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Quote:
Originally Posted by AZJeepNewbie View Post
Yeah, you're right. It's just the skid plate mount. I guess I could grind it to add some clearance. But, I'm wondering why I haven't heard of folks having this problem before.

Thanks!
That problem happens whenever you lift an auto(03-06) because of the skid up front on 03-06's.Simply take a sawsall or hack saw,cut half way through the crossmember directly under the driveshaft where it hits and 5" wide,then bend the piece back to keep the support on the skid.
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post #10 of 27 Old 06-11-2010, 05:50 AM
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Originally Posted by TheBoogieman View Post
That problem happens whenever you lift an auto(03-06) because of the skid up front on 03-06's.Simply take a sawsall or hack saw,cut half way through the crossmember directly under the driveshaft where it hits and 5" wide,then bend the piece back to keep the support on the skid.
X2. One more thing to think about when lifting a Jeep with the 42RLE.

If you're staying on the pavement, just take the "t-shaped" part that's hitting the driveshaft off. There's 1 bolt into the frame on each side and I think 2 holding that part onto the t-case skid. Just leave the t-case skid in place.

Mine is gone in anticipation of being replaced by the Savvy under armor

Quote:
Originally Posted by Imped View Post
Your shaft isn't long enough to handle that kind of droop...
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post #11 of 27 Old 06-11-2010, 06:58 AM
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Don't buy Rusty's tranny skid. You'll have the same problem. I just gave mine away after modifying it 4 times.

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post #12 of 27 Old 06-11-2010, 07:57 AM Thread Starter
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Thanks, guys! I can't believe after two years of reading this forum, I never of this problem before. How come ya'll didn't say anything on my build thread, huh?

Time to get out the hacksaw and play with the welder. Oh, and I do have a message into Gerald about being a tester for their skid when it comes out for the Rubicon auto.

Thanks again!

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post #13 of 27 Old 06-11-2010, 05:39 PM
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...........Oh, and I do have a message into Gerald about being a tester for their skid when it comes out for the Rubicon auto...........
Get back in line, kid!

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post #14 of 27 Old 06-11-2010, 06:11 PM
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I just cut the support at the skid and unbolted it at the frame. It's still pretty sturdy I ran plenty of hard trails with lots of rocks and never had a problem. Now Ive got a Full Traction Engine/Trans skid that bolts to their belly skid.
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post #15 of 27 Old 06-11-2010, 06:41 PM
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