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Is all manifold vacuum the same? I have the rear port on the valve cover connected to a vacuum port on the rear of the manifold it is supposed to be routed to the front of the manifold. Does it matter. Oh this is on a 90 xj with 4.0. Thanks

I can not find an oil filter to fit my 4.0. The engine came out of a 1990 xj but it appears to be a different year block. It has the horizontal style mount. The filter that a 90 calls for (ph-3985) does not screw on properly. So I grabbed a ph-16 and it screwed on fine but the seals don't seam...

What do you thing would win in a race? 90 yj with renix 4.0 / ax15 / 4.10 gears 91 xj with h.o. 4.0 / aw4 / 3.55 gears lets say 1/8th mile.

I am looking for a good condition aw4 out of a 91-95 xj or 93 zj. Anyone have one to spare?

Does anyone know if a aw4 out of a 91-? xj will fit into a 93 zj. Are the tranfercases the same spline?

I have a np231 tc out of a 91 xj I need to get rid of. Anyone need one? $150

Do all renix 4.0's have a knock sensor? I have a 90 4.0 out of an xj that I am putting in a yj and I was expectiing to have to move the knock sensor to put my motor mount on and there was not one.

I am trying to put a aw4 out of a 1990 xj into a 1991 xj that has a aw4. I will swap out the tranfer case also. Do you know if I will have any other issues. Thanks for any help you can give.

Is there any good trails around Hickory NC? I know Tellico is a few hours away but what about within an hour or so of hickory.

I have a transmission (aw4) and a transfer case (nv231) out of a 90 xj. Would take $100 each. Will ship the t.c. on your dime. Do not want to ship the aw4.

Does anyone know if rusty's air tube is smog legal in Ca. for a renix engine? I searched and could not find anything. Thanks

Looking for a 1990 jeep factory service manuel.

I am parting out a 90 xj that I got for a motor swap. It is a 4 dr and has a good aw4 tranny / np231 tc / dana 30 front and dana 35 rear. basically everything except the motor and suspension. I know these parts are not the most desirable so don't be afraid to make a offer. It will go to the...

Does anyone know if a 90 yj ax-15 will bolt up to a 90 xj 4.0. Is the cps going to be in the right location? Any other issues you can think of? I am preparing to put the 4.0 out of the xj into my yj. Thanks in advance.

Wanted 4.0 engine, computer and harness. Looking to do a swap. Looking for something with lower mileage. Under 200,000. Thanks

i need a T C for 96 jeep grand cherokee