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AW4 & AX15 Tranny Cross-Member Differences?


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I read somewhere that if you used an MJ/XJ AX15 tranny crossmember on an MJ/XJ w. the AW4 transmission, you will get about a 3/4" tranny drop w/o any loss of ground clearance. I know that the rubber tranny mounts are the same. Anyone have a couple of the x-members lying around to compare the differences? I'd like to try it as I have slight driveline vibration at about 35-45 MPH (had it for years) and would like to try this to see if it helps kill it. And no, I don't want to shim down the existing crossmember. :D

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I will get a pic tonight, but the difference is right about 3/4". The locations for the trans mount are identically centered as well

 

Thanks. Will swapping the x-member affect the exhaust hanger bracket?

 

 

The exhaust divot on the crossmember is in the same location as well, to keep the exhaust from contacting it. IIRC it is also alot deeper to accomodate for the height of it. I will double and triple check that for you here and post back tonight about it...Out the door to run back to the shop and get some more work done.

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407440_931743551983_69205416_39567696_909055680_n.jpg

428286_931743651783_69205416_39567697_804122698_a.jpg

428317_931743402283_69205416_39567694_1590163071_n.jpg

 

the exact difference. 5/8"

426538_931743187713_69205416_39567692_1578938998_n.jpg

 

the exhaust divot is in the same location, at the same depth as the automatic. after looking at an automatic comanche sitting here, and a manual one, the exhaust hangars are identical as well. I would imagine that you would simply have to loosen up the downpipe a little bit, lift the exhaust up, and re-tighten it in order to maintain the same clearance. there is enough free play alotted by the donut on the manifold to accomodate. likewise, a borla header and most other aftermarket headers will allow for that adjustement.

 

 

Good luck. it will probably make an almost perfect difference in your driveshaft angles.

 

-Pat

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Thanks Pat for that. (Poetry 101 :D ) I have quite a bit of clearance now on the down pipe from the x-member I think. The below is a pic of the header I use; no means to easily adjust it. But I think it will clear okay. I think this is a worthwhile mod. :cheers:

 

I6header.jpg

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