oil pan to axle clearance?

**carcrafter22** · 02-28-2010, 12:18 PM

How much clearance do you guys like to see from front axle to oil pan so I can place the engine when the time comes? This will be on a 2001 WJ grand cherokee, dana 30 front axle, RC 4" lift isuzu 4bd2t.

I figure around 3" should be plenty but I am not sure since I dont mess with 4x4's much.

**khaoskustoms** · 02-28-2010, 01:07 PM

1-2 inches of clearance around the pan when the front suspension is cycled through it's range of motion. Pulling out the springs and bottoming out the suspension on the bumpstops will tell you max travel up. Give you an idea where the diff is going to be in a worst case scenario.

**carcrafter22** · 02-28-2010, 05:00 PM

I was thinking about it more and seems to be that even 1/2" of clearance would work as long as its with the axle hitting the bumpstop. I dont know why I didnt think of that before DUH! LOL.

**CrewCab59** · 02-28-2010, 05:38 PM

Originally Posted by carcrafter22

I was thinking about it more and seems to be that even 1/2" of clearance would work as long as its with the axle hitting the bumpstop. I dont know why I didnt think of that before DUH! LOL.

Your going to need more than a 1/2" , the bump stops have more compression than that ,2-3" would be the least I would want it.

Scott

**turbos10** · 02-28-2010, 08:10 PM

I think I would shoot for just enough not to hit the pan

**carcrafter22** · 03-01-2010, 06:34 PM

All valid points. I would like to see at least 2" at full suspension travel so I never have to worry about it. I ordered a complete 4" suspension lift today and returned the other setup so I can gain some much needed clearance for this thing.

**The Bladesmith** · 03-01-2010, 09:24 PM

When I started my build I was told that 3-4" was desirable. Like the other guys were saying though, you could probably get by with less as most of the suspension travel happens at the wheel. How often is your wife going to flex this thing all the way out? You know more lift is ALWAYS better...

**3.9 islander** · 03-02-2010, 06:21 AM

i dont know how your 4bt is set up but with mine i had the same delima with my jeep yj, with my 4bt the deep part of the oil pan was in the front of the motor, i thought i needed more lift. but i was looking at it one day and realized you can switch it around so the deep part is in the back, solved the clearence issues up with me

**dillenger1** · 03-02-2010, 06:26 AM

Originally Posted by 3.9 islander

i dont know how your 4bt is set up but with mine i had the same delima with my jeep yj, with my 4bt the deep part of the oil pan was in the front of the motor, i thought i needed more lift. but i was looking at it one day and realized you can switch it around so the deep part is in the back, solved the clearence issues up with me

i dont know if you can do that with a 4bd2t

**3.9 islander** · 03-02-2010, 06:30 AM

my bad i just glanced and saw the 4b and t at the end, sorryy

**papitt** · 03-02-2010, 08:59 PM

Those post made me feel better I have about 2 inches built into mine so far but I really didn't think it was enough .. Maybe it is .. I was going to start mine on this amount an then add some more room after I get it headed down the trail.

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