Question about 1999 Jeep Grand Cherokee

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Which transmission line is cooling and which one is hot connecting to the transmission

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Just get under front of vehicle when idling. but drive it a little bit. then get under and check by hand which one is cooler. be carefull of fan blade!! if need be shut vehicle off and check.

Posted on Nov 13, 2010

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Posted on Jan 02, 2017

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1 Answer

Can a fan problem make the trains act up


Do you mean transmission? It could if it gets to hot. The transmission fluid is passing through the radiator also. It ha 2 lines going from transmission to radiator for cooling. If rad over heats it certainly could.

Jul 19, 2017 | Cars & Trucks

1 Answer

1996 Ford Ranger automatic transmission check the fluid over full removed month later over full again where is this fluid coming from and I'm not adding fluid to it and on long trips the over drive goes in...


How much "over full"?
(Realize that the fluid level will be slightly higher when the trans and fluid is hot, and lower after when the vehicle has not been running and cold).
If it is only 1/4" (~10mm) overfull, that could account for just normal fluid temperature expansion. Anything greater than that may indicate the following problem.

That said, if the fluid level is significantly higher than normal, there is only one place that can leak "fluid" into the transmission. That would be the rare case where there is a hole in the transmission cooling line which usually connects into the radiator for the engine coolant to cool the transmission fluid passing thru the trans cooling line.
If a hole/crack developed in the trans cooling line inside that location, antifreeze/coolant could leak into the trans line.

Is the trans fluid on the trans dipstick normal colored, or does it appear to be milky with water/coolant intrusion?

Oct 31, 2014 | Ford Ranger Cars & Trucks

1 Answer

On my 95 safari van there is an oil leak on the line connection to the rad. The line come from the base of the oil filter.Is this an extra cooling system for the oil when the van is used for towing?


The two oil lines connected at the radiator normally are for transmission oil cooling either way there will be two lines one in one out.. If you are sure it's engine oil you can remove the line cap both connecting fittings.BE absolutely sure They are not to the transmission. Oil from the transmission is pink or smells bad when dirty.

Sep 10, 2014 | 1995 GMC Safari

1 Answer

Where is the return transmission line located on a 2005 3.7l jeep grand cherokee. By the radiator. But is it on the driver side orcthe passenger side? Is it the top or bottom line?


Generally speaking ... oil goes in hot and comes out colt ... heat rises ... while I an not familiar with your particular car, my guess would be that the hot oil goes in the top and is cooled as it flows down through the cooler and returns to the transmission via the bottom line.

Give it a try ...

Jun 06, 2011 | 2005 Jeep Grand Cherokee

1 Answer

Transmission works fine when cold but when transmission gets hot car will not move in drive or reverse


SOUND LIKE TRANSMISSION GETTING HOT CHECK TRANSMISSION FLUID LEVEL.IF LEVEL OKAY FLUID + FILTER BEEN CHANGED MAKE SURE TRANSMISSION COOLING LINES TO RADIATOR NOT PLUGGED CAUSING TRANSMISSION OVER HEAT. OR LEAKING TRANSMISSION FLUID.

Aug 29, 2010 | 1993 Dodge Spirit

2 Answers

Removing the transmission cooling line fron


These lines just run straight through the radiator to provide cooling. You can bypass the radiator by adding a transmission fluid cooler, during the cold weather in a pinch, a replacement transmission hose with 2 clamps can be connected between the 2 transmission lines to correct leakage, but in warm weather, the fluid suffers if it doesn't get the benefit of a cooler.

Aftermarket coolers are relatively inexpensive, especially compared to the long term benefit of keeping the fluid degrees cooler, prolonging the life of the trans.

good luck

Feb 22, 2010 | 1996 Dodge Ram

1 Answer

My transmission line that connects to the radiator


The easiest fix is to get a transmission fluid cooler & use it to replace the fan connection completely. Basically you'll just shorten your lines a bit to clamp a hose over them & connect both lines to the 2 lines on the cooler. the cooler installs onto the front of the radiator with push through connectors that makes it easy to install & it will provide you even better trans. cooling in the warm months.

I have seen people use just a hose to connect the 2 lines & not have any problem in the cooler months but you really do need the trans fluid cooled during the warmer months to prevent trans damage.

check you fluid & top it off properly after making the repair!

Good Luck

Jan 27, 2010 | 1996 Chevrolet Cavalier

1 Answer

Bot wrong rad is it bad to not connect the tran lines


Yes you most definitely have to connect the transmission cooling lines or hook an auxilary transmission cooler up which cost around $70.00 and is very easy to install.

Dec 18, 2009 | Jeep Cherokee Cars & Trucks

1 Answer

I HAVE A 95 FORD AEROSTAR AND MY PROBLEM IS THAT THE TRANSMISION FLUID IS SOME HOW GOING INTO THE MOTOR IS THAT POSSIBLE AND IF SO WHAT MIGHT BE THE PROBLEM THANK YOU FOR HELPING


It sounds like you have a leak inside your radiator, if you have an automatic transmission the fluid needs to be cooled on long trips, hard loads (towing etc) or on hot days, this is accompished the same way your engine is cooled, by running lines from the transmission then through the radiator, the air going through the rad and also the coolant from the engine cools the tranny fluid then routes the cooled fluid back to the transmission. If the lines that run through the rad have a hole in them the fluid will leak out and into the engine coolant (antifreeze) and the fluid will make it's way into the engine through the engines cooling system, the other side of this is that engine coolant is possibly making it's way to your transmission and this is an even bigger problem as the coolant does not have the lubricity properties needed by your transmission and you are soon going to have operation problems with your transmission. You need to get this fixed soon and have both the engine cooling system and the transmission flushed to remove the cross contamination.

Nov 30, 2009 | 1998 Ford Aerostar

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