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Unread 07-16-2010, 11:14 PM   #1
akajean
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Differentail Housing has oil leak - do I have a problem?

My '97 cherokee sport's differetial seems to have some oil covering the lower part, I think it's supposed to be dry... and also the muffler is making sounds....

scared, is it still ok to drive?

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Unread 07-16-2010, 11:40 PM   #2
freakinheep89
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which differential and do you mean that just the differential housing is covered in fluid(the outside of the axle) or when you take the diff cover off the differential itself is almost dry?
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[QUOTE=slayercr23;12630497]How would i go about Stroking it?[/QUOTE]
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Unread 07-16-2010, 11:44 PM   #3
akajean
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Originally Posted by freakinheep89 View Post
which differential and do you mean that just the differential housing is covered in fluid(the outside of the axle) or when you take the diff cover off the differential itself is almost dry?
Thanks for the reply

it's the rare one and the cover (the round part) is covered in fluid, I haven't opened the cover
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Unread 07-17-2010, 01:08 AM   #4
CJ7-Tim
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Even a slight amount of oil leakage spreads out and appears to more than it what it actually is. As long as you keep the differentials full to the bottom of the fill/inspection hole on the cover, it will be fine.

The muffler can make noise if it is loose or if it has a leak, both issues can be fixed rather easily.
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Last edited by CJ7-Tim; 07-17-2010 at 01:50 AM..
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Unread 07-17-2010, 01:12 AM   #5
akajean
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Originally Posted by CJ7-Tim View Post
Even a slight amount of oil leakage spreads out and appears to more than it what it actually is. As long as you keep the differentials full to the bottom of the fill/inspection hole on the cover, it will be fine.

The muffler can make noise if it is loose of if it has a leak, both issues can be fixed rather easily.
Tim, thanks so much for the reply. I think I'll still drive it during the weekend and take it to a mechanic on Monday.

Can the problems in muffler and differential result a drop fo mpg? My mpg is like 6-8....really poor...and that's why I checked the bottom of the car. The parts under the hood seemed to be ok, tho.
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Unread 07-17-2010, 01:25 AM   #6
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Originally Posted by akajean View Post
....a drop of mpg? My mpg is like 6-8....really poor...
No, neither of those will cause an MPG drop.

You should get 12-15 mpg in the city and 18-22 on the highway. If all your tune-up parts are fresh, you have another problem, possibly with the O2 sensors, a clogged Catalytic Converter, or the Coolant Temperature Sensor. The only way to find the problem is to test the systems or sensors that are possible causes of the mileage drop. You want to be sure what is wrong before you spend any money on new parts. Simply throwing new parts at a problem is stupid if you don't know what is wrong with it.
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Unread 07-17-2010, 01:31 AM   #7
akajean
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Originally Posted by CJ7-Tim View Post
No, neither of those will cause an MPG drop.

You should get 12-15 mpg in the city and 18-22 on the highway. If all your tune-up parts are fresh, you have another problem, possibly with the O2 sensors, a clogged Catalytic Converter, or the Coolant Temperature Sensor. The only way to find the problem is to test the systems or sensors that are possible causes of the mileage drop. You want to be sure what is wrong before you spend any money on new parts. Simply throwing new parts at a problem is stupid if you don't know what is wrong with it.
I just got the fornt o2 sensor changed because the CEL was on and I got the code for the front o2 sensor. Now the light is off but the mpg did not rise. Air filter is clean, radiator is new, fans are running ok, but my friend who knows better about cars found the hood too hot and suggested maybe I should get a radiator flush..

Thanks for the advice I'll keep in mind.
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Unread 07-17-2010, 07:42 PM   #8
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anybody know if the XJ's have the adaptive memory controls that have to be reset like the ZJ's? if so that may be the problem
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[QUOTE=slayercr23;12630497]How would i go about Stroking it?[/QUOTE]
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Unread 07-17-2010, 07:49 PM   #9
akajean
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anybody know if the XJ's have the adaptive memory controls that have to be reset like the ZJ's? if so that may be the problem
do you mean that after the CEL is off, they alse have to reset the computer memory, otherwise the mpg's gotta be the same as before the 02 sensor was replaced?
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Unread 07-17-2010, 07:54 PM   #10
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yes on ZJs there are adaptive memory controls that must be reset after a major component change like an o2 sensor, i changed mine yesterday and had to clear em out. it makes alot of difference. just disconnect your positive cable and touch it to the block or alternator or whatevers close to it on the 4.0, hold it there for 30 sec, then completely disconnect the battery for 30min.
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[QUOTE=slayercr23;12630497]How would i go about Stroking it?[/QUOTE]
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Unread 07-17-2010, 07:59 PM   #11
akajean
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Originally Posted by freakinheep89 View Post
yes on ZJs there are adaptive memory controls that must be reset after a major component change like an o2 sensor, i changed mine yesterday and had to clear em out. it makes alot of difference. just disconnect your positive cable and touch it to the block or alternator or whatevers close to it on the 4.0, hold it there for 30 sec, then completely disconnect the battery for 30min.

Thanks a lot for the suggestion. Just one concern, will this remove all memory so I will not be able to discover other potential problems that I wasn't aware of before? (i hope this makes sense...
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Unread 07-17-2010, 08:13 PM   #12
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Your xj learn's all the time it adapts to your driving style . If you clear your memory it take about 50 key starts to adapt totaly , when you replace a sensor it adapts from that point .




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Unread 07-18-2010, 10:52 AM   #13
akajean
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Your xj learn's all the time it adapts to your driving style . If you clear your memory it take about 50 key starts to adapt totaly , when you replace a sensor it adapts from that point .




Brizzle
thanks Brizzle, do you mean I don't have to reset it because it's already started to learn from a new point after the o2 sensor was replaced?
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Unread 07-18-2010, 12:04 PM   #14
freakinheep89
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it will learn over again, it just takes alot longer than if you reset the adaptives. resetting the adaptives will not prevent you from discovering future probs since any codes present will pop up again since you did not replace them, i would go ahead and reset it
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[QUOTE=slayercr23;12630497]How would i go about Stroking it?[/QUOTE]
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Unread 07-18-2010, 01:04 PM   #15
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thanks Brizzle, do you mean I don't have to reset it because it's already started to learn from a new point after the o2 sensor was replaced?

Correct


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