What caused trans fluid to leak at rear of trans? what is the reccomendation for ATF fluid?

what gear box.
5speed manual "GL4 gear lube 4, can stink bad"
or autotmatic. (ATF pink fluid, and smells sweet)

what engine, some engines, leak oil and goes to the bell housing
then down hill (gravity and wind) to the exh. pipes.
what engine, the 2.7L V6? or G16 or J20? what?
and on calif cars they have calif exhuast, and fits up different,..
so no country stated, or if in calif. (exhaust questions....)

if the gear box leaks, (any)
we first check to see if its overfilled (Jiphphyboobs/syndrome)
if M/t the side plug inspection port, and transfer case.
if A/T box. (automatic) we read the operators guide, not guessing how and read that on a hot running engine we check ATF levels.
if overfilled the ATF foams and will leak and cause bearing failure.
air bubbles do not work right as lubrication... ever.
filled to hot mark on dip stick
unless the stick is missing, as is true on newer cars.

if trans leaks, say where it leaks.
top , bottom
front or rear.??

pretend we are blind. and win.

if you changed the trans oil pan and used a gasket it probably will leak ,most dodges use mopar atf-rtv sealer available at the dealer for the trans pan,,if it is leaking between the trans and tcase you will have to determine which unit is leaking fluid and replace the seal and gasket between them you can put oil dye in the tcase fluid and run it and use a dye light to see if the fluid leaking has dye in it and if not then it is the trans

I worked on buicks at a dealer for 15 years and never saw a torque converter seal leaking...if its trans fluid that leaking i would suspect a front pump seal in the trans,If is not trans fluid make sure its not the back of the intake manifold leaking down the bellhousing seaming to leak from the trans. ..If oil maybe rear main seal... No special tools needed really just make sure you support the engine safely if you are going to remove the trans.....

Did you check your ATF level? I have an ATF leak somewhere and when my ATF gets really low my auto trans will keep slipping out of gear until I dump another quart or two of ATF fluid into the trans.

Check your owners manual, it will give you the type
and fill capacity, if your doing a trans service.

First I would check your fluid level. There are 2 plugs located on the rear of the transfer case. Remove the top one and verify fluid level. To repair the leak the transfer case will need to be removed and reinstalled with a new gasket.

Verify fluid level first, add if needed and verify that sound goes away. If sound fails to go away you will need to have the transfer case replaced or rebuilt. I think the fluid is Dextron III ATF. Double check with another source before adding fluid.

Auto or Std trans??

If auto here's the issue...

Keep in mind Auto transmissions don't like to be run dry.

Also keep in mind that the 01M Automatic you most likely have retails for like $4000 just for the unit, not installation.

The corner trans guy can't rebuild the trans. This is a special unit

Just to check the fluid-

Hook up a Laptop with Vag.Com software installed.

Start the car and go into the transmissions data blocks and go to block 005, this will display fluid temp.

-ATF temperature not above approx. 30C (86F)
-Vehicle level
-Selector lever in "P"
-If ATF is below 30C (86F) bring the ATF up to test temperature.
Test temperature: 35C to 45 (95 to 113F)
-Remove ATF level plug from oil pan.

CHECKING PHYSICAL QUANTITY

If ATF drips out of hole:
ATF need not be topped up.
-Install new seal on plug and tighten to 15 Nm11 ft lb).
ATF check is completed.

If ATF does not drip out
-Remove plug from filler line.
-Fill with VW ATF (G 052 162 A2) until ATF runs out of level hole
-Install new seal on plug and tighten to 15 Nm (11 ft lb).
ATF check is completed.

CAUTION!
Too little or too much ATF will adversely affect transmission function.

Is it still fine? Some people, even mechanics, think you can use transmission fluid other that ATF+3 or ATF+4. YOU ABSOLUTELY CANNOT use even a drop in your transmission. If there is ANY, completely drain and fill with proper fluid.

GENUINE HYUNDAI transaxle oil, GENUINE DIAMOND ATF SP-III or SK ATF 3 for automatic trans

Fluid can leak out of the driveshaft seals, the input shaft seal, the transmission pan gasket, the torque converter or the ATF cooler and line connections. If the fluid level gets low, the transmission may be slow to engage when it is shifted into drive. Gear shifts may be sloppy or delayed, or the transmission may slip between shifts. If the fluid level is really low, the transmission may cause the vehicle to not go at all.fluid level should be checked when the fluid is hot with the engine idling, the parking brake set and the transmission in Park. If fluid is needed, add only enough ATF to bring the level up to the full mark. Do not overfill because doing so can cause the fluid to become aerated, which may affect transmission operation. If the dipstick reads low, the transmission is probably leaking. So look underneath to see where the fluid is going. If there are no visible leaks, check the radiator for ATF in the coolant. The ATF cooler inside the radiator may be leaking and cross-contaminating the fluids.
You should also check the condition of the fluid. Some discoloration and darkening is normal as the fluid ages, but if the ATF is brown or has a burnt smell, it is badly oxidized and needs to be changed. Varnish on the dipstick is another indication of worn out fluid.
You can also do a "blotter test" to check for worn fluid. Place a few drops of ATF on a paper towel and wait 30 seconds. If the spot is widely dispersed and red or light brown in color, the fluid is in satisfactory condition. But if the spot does not spread out and is dark in color, the ATF is oxidized and should be changed.
Many transmission experts say most transmission problems can be prevented by changing the ATF and filter regularly for preventive maintenance. How often depends on how the vehicle is driven. For some vehicles, this might be every 30,000 miles or two years.
The harder the transmission works, the hotter the fluid runs. The life of the fluid drops quickly once its temperature gets up above about 200 degres F. Installing an aftermarket auxiliary ATF cooler that is parallel to the OEM ATF cooler is recommended to keep fluid temperatures down on vehicles that are used for towing or are driven hard.
ATF also becomes contaminated with normal wear particles from the clutch plates, bushings and gears. The filter will trap most of this debris before it can cause problems. But many older Asian transmissions only have a plastic or metal screen that does little to protect the transmission against internal contaminants and nothing to keep the fluid clean. On these vehicles, changing the fluid is the only way to get rid of these contaminants.
When adding or replacing ATF, use the type specified by the vehicle manufacturer. GM, Ford, Chrysler, Honda, Mercedes and others all have their own specs for ATF. There is no such thing as a "universal" ATF that works in all transmissions. Some fluids meet a variety of specifications, but cannot meet them all because of the different friction additives that are required.
Ford has three automatic transmission fluid specifications: Type F (a non-friction modified formula for most 1964-81 transmissions), Mercon (a friction modified ATF similar to Dexron II for 1988-97 transmissions), and Mercon V (Fords latest friction-modified formula, introduced in 1997).