Hey all, I was visiting my dad and the Jimmy today and noticed a huge oily stain under the Jimmy. I guess it's been leaking for awhile as its half the size of the Jimmy.

I checked all the fluids, oil, brake fluid, transmission fluid and the coolant reservoir is at full. I'm stumped as where this leak is coming from.

it's been a month or 2 since I checked the Jimmy and there wasn't a leak last time, I'd assume something would be empty or half level by now. This Jimmy hasn't been started in 2 months due to a dead battery.

 

The 4x4 remote oil cooler & filter lines are notorious for leaking. Another common oil leak is the front seal in the timing chain cover.

 

Thank you, the remote oil cooler lines looks like a DIY job. Not sure if I can tackle the front seal.

The Jimmy hasn't be started or ran for a few months. (Going on year 4 parked in the garage). So I'm assuming all the oil is in the pan. Would it still leaked from the 2 parts you mentioned?

 

I rechecked all the fluids and they are all full.

 

[QUOTE - The Jimmy hasn't be started or ran for a few months. (Going on year 4 parked in the garage). [/QUOTE]

If this is the case just how did you manage to check the transmission fluid level as it needs to be running at the time ?
What color is the fluid on the floor ?

 

If this is the case just how did you manage to check the transmission fluid level as it needs to be running at the time ?
What color is the fluid on the floor ?[/QUOTE]

Thanks for the reply, I didnt know it had to be running. I just pulled the dipstick out near the rear of the engine, wiped the fluid off and rechecked.

It is a dark brownish color.

 

That color can be quite normal for an old truck where ATF has never been changed.

As for checking, the normal procedure is to bring it up to normal operating temperature.
Park at a flat surface location such as garage but not on an incline such as a driveway.

Set the parking brake and hit the brakes (precaution) and switch through all gears out of park, one by one and leave it there for a couple seconds (3 - 4) before switching to the next.
All the way down to 1st gear and back up to Park. Make sure it is back in park (safety).

Then check with running engine. Careful about the running fan and belt drives.
I check from the passenger side over the fender to avoid the front area.

 

I did this procedure and the level on the dipstick is 3/4. The front diff has a plug I need to remove to check the level?

 

Hey error, i decided to do this procedure again as I noticed the stain on the cement got bigger.

I did the procedure twice and the dipstick showed bone empty. Just a little bit in the tip.

Will have to purchase a new gasket for the transmission. Do these have filters?

 

Frisco 204,

I just recently did a fluid change on my trans. These do have a filter on them, cost with the pan gasket is about $25. You will also need 5-6 quarts of dexron transmission fluid. Be aware it may be leaking from the front trans seal and not the pan, you can pull the little service covers on the bottom of the bellhousing and inpsect the torque converter and related area in the bellhousing for leaks.