Transmission cooler leak was trying to get it home it cut off an now it won’t start it acts like it needs a jump what do I need to

Transmission cooler leak was trying to get it home an it cut off an now it don't want to start I stop a gas station an I had to wait about an hour then it stated tried to hurry an get it home but it cut off a few blocks away from my house now it won't start it sound like it needs a jump what is it I need to do
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
Your problem scenario sounds like at least 2 problems that appear to be interacting to look like one big mess.

First off, there is the transmission cooler leak, which will drive up transmission fluid temperature (what’s left) to the point it will overheat the transmission and shut off the engine. The transmission fluid leak requires repair so that this does not occur again. The transmission in your 745 is very expensive!

The no-start condition may be caused by a "still too hot" transmission, or failure of the Integrated Supply Module, which has a critical role in the "start" process. This module will fail in a manner similar to what you are experiencing, is relatively inexpensive and easy to change.

I would recommend having YourMechanic diagnose this issue, provide an accurate assessment of damage, and estimate the cost of repairs. YourMechanic can dispatch a mobile, professional mechanic to your location for a diagnostic of your no start condition and help you fix the issue accordingly.

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

If there was a rupture of the internal radiator tank can cause the coolant to mix with and contaminate transmission fluid. The engine coolant can also become polluted by the transmission fluid, as the pressures of either liquid vacillate.
The fuel pan gasket is the number one culprit if your vehicle`s transmission fluid leaks when your car is parked. Cars with automatic transmissions have a pan gasket designed to catch most fluids leaking from the engine.
Transmission Control Module

The TCM on most BMW vehicles is located in the E-Box next to the ECM (DME).

The transmission or engine misfires could be from the coolant leak if the coolant is getting onto the wiring of the engine. You may also be going into failure mode if the engine is running hot.
LEAKING TRANSMISSION FLUID: WHY IT`S CAUSE FOR CONCERN

Left alone, the little leak will become a bigger one. Eventually, your transmission —which makes sure power gets from the engine to the wheels — won`t be able to perform as it should, and you may experience: Delayed engagement when placed in gear.

If the transmission`s vacuum modulator were faulty, it could be sucking out transmission fluid and dumping it into the carburetor. If that were happening, the fluid would be combusted along with the fuel, and would come out the tailpipe as smoke.
A transmission leak is a common occurrence that happens through excessive wear over time. The plugs could be loose or the pan could be punctured. Either way, the moment you notice transmission fluid, contact your local mechanic and have them inspect and repair your transmission fluid leak.
You hear odd noises coming from the transmission: Your transmission may have difficulty shifting between gears, or there may be clunking or grinding noises during shifts. This can indicate transmission fluid loss, high internal transmission temperatures, or both, which can be caused by a bad transmission cooler.
DIY repairs can often lead to this problem. Thankfully, this particular problem does not require a major repair. Your technician can repair the transmission leak by replacing the seals to fix the problem.
When the torque converter starts malfunctioning, you may feel shuddering and even slipping in overdrive. You usually notice your car shuddering because it feels like it`s vibrating. Your car will vibrate even when you`re not going very fast. The shuddering makes the car lag and is very noticeable.
Transmission fluid leaking from the bell housing can have a few potential causes. One possibility is a damaged gasket or seal, which can lead to fluid leakage. Another potential cause could be a crack or hole in the bell housing itself, allowing fluid to escape.
Internal Transmission Damage

In other more serious cases, leaking transmission fluid could be a crack in the transmission housing or a sign of other serious internal damage. If you notice transmission fluid leaking under your vehicle, you shouldn`t wait to have it inspected by a transmission expert.

What does transmission fault mean on BMW? The transmission fault warning is a warning light that may pop up on your BMW when your vehicle is detecting a possible problem with the transmission. This warning seems to occur more often on vehicles with automatic transmissions rather than manual transmissions.
If you start to hear whining, humming, or clunking noises under your BMW, it could be a sign of transmission trouble. These noises could stem from the fact that the transmission fluid is breaking down. The fluid is designed to lubricate the transmission`s components and keep them cool.
But a blown fuse No. 38 becomes a likely candidate causing a loss of power to the transmission solenoids.
One of the most common issues is gear slippage. This occurs because the TCM is not giving the correct commands to shift, which can cause sudden shifting or not shifting at all. Another common symptom is failure to accelerate as usual. If your vehicle cannot change gears correctly, your car`s acceleration will suffer.
The Transmission Control Module (TCM) controls modern automotive transmissions based on input from various sensors as well as data provided by engine control module (ECM).
If you`ve got a front seal transmission leak, you`ve got 2 options to fix it. First, can remove your transmission and replace the front seal. Second, you can use BlueDevil Transmission Sealer in your transmission to rejuvenate the front seal and stop the leak.
SYMPTOMS – Failed in the Open Position

With the transmission unable to slip, the engine will stall when the vehicle comes to a stop. This type of solenoid failure will set a Diagnostic Trouble Code causing the Check Engine Light to illuminate.

Signs Your Transmission Cooling Lines are Failing

Leaks where the cooling lines connect to the radiator are common. Look for red fluid when checking for leaks. Low fluid levels – If you suspect a problem with your transmission lines, check the fluid levels using the dipstick. If the levels are low, it indicates a leak.

In order to fix a water flooded transmission, it`s going to need a total overhaul at best and replacement at worst. The parts and materials that make up the transmission are very sensitive. They need to be handled with care especially after flood damage occurs.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Transmission cooler leak was trying to get it home it cut off an now it won’t start it acts like it needs a jump what do I need to
ANSWER : Your problem scenario sounds like at least 2 problems that appear to be interacting to look like one big mess.

First off, there is the transmission cooler leak, which will drive up transmission fluid temperature (what’s left) to the point it will overheat the transmission and shut off the engine. The transmission fluid leak requires repair so that this does not occur again. The transmission in your 745 is very expensive!

The no-start condition may be caused by a "still too hot" transmission, or failure of the Integrated Supply Module, which has a critical role in the "start" process. This module will fail in a manner similar to what you are experiencing, is relatively inexpensive and easy to change.

I would recommend having YourMechanic diagnose this issue, provide an accurate assessment of damage, and estimate the cost of repairs. YourMechanic can dispatch a mobile, professional mechanic to your location for a diagnostic of your no start condition and help you fix the issue accordingly.

Read Full Q/A … : Transmission cooler leak was trying to get it home it cut off an now it won’t start it acts like it needs a jump what do I need to

Fuel pump engages. Batery good, alternator good volts, jump start helps when wont start. Temp does not matter. Intermittent?
ANSWER : Hello. Thank you for writing in. There are several reasons your vehicle may only start when jump starting. The first and most common is a build up of resistance that is causing you to need a boost of voltage to get the engine started. This may be due to poor battery cables, a bad ground connection, a poor starter solenoid, and a couple of other issues. The first thing you want to do is perform a visual inspection of the starting system. Make sure there is no corrosion build up in the battery cables. You can also check the resistance across these wires and make sure you have a solid connection between components. You then want to make sure the starter solenoid is doing its job. It is responsible for taking the small amount of electricity sent by the ignition and turning it into a huge electrical charge that is strong enough to push over the engine with the help of some gear ratios in its favor. Do some more testing, and stick to the basics before assuming its something seriously complicated.

Read Full Q/A … : Transmission cooler leak was trying to get it home it cut off an now it won’t start it acts like it needs a jump what do I need to

Vehicle won’t start, once it’s jump started it only stays running until you turn it off, then it work start again without jumping.
ANSWER : Hi there. There could be two problems here. It is possible that your battery is bad and will not take a charge from your alternator while driving. In that case every time you shut your car off you will not have enough juice to start it again. Inspect your battery – it should have at least 12.5 to 13 volts to start your car, if it doesn’t you will need to replace the battery. The second problem could be that your alternator is bad and not charging your battery, in this case you will need to replace your alternator. Both the battery and the alternator can be tested in your car. If you would like to have the car checked for you, a certified professional from YourMechanic can come to your car’s location to diagnose the starting problem and proceed with repairs.

Read Full Q/A … : Transmission cooler leak was trying to get it home it cut off an now it won’t start it acts like it needs a jump what do I need to

My truck has problems turning over when I crank the engine (it won’t start), and my battery keeps draining.
ANSWER : Hi there, thanks for writing in. It sounds like your vehicle may be having a couple of problems. For the first problem, regarding the battery being drained and not charging back up, you will need to have the charging system checked to see if the alternator is faulty and/or needs to be replaced. For the second problem of no turning when cranking it, the issue may be that the starter is going bad from trying to crank it with a weak low battery, and may need to be replaced. If you would like help with having these inspections performed, consider having one of our expert automotive technicians come to your home or office to look at and diagnose these issues for you, and make any repairs as needed. Hope this helps and good luck!

Read Full Q/A … : Transmission cooler leak was trying to get it home it cut off an now it won’t start it acts like it needs a jump what do I need to

I tried to jump another car and when I tried to turn mine back on it won’t start, it acts like it’s going to but don’t
ANSWER : Hi there. When a car won’t start but will crank over, it’s caused by an ignition system or fuel system failure; so it shouldn’t be related to the jump start. The only exception of this is if you connected the battery cables wrong (on either car). It’s more likely, especially if you ran out of gasoline, that the fuel pump is damaged. Since it could be one of more than a dozen individual components that are causing the car to not start, it’s probably a good idea to have a professional mobile mechanic come to your location and complete a car is hard to start inspection.

Read Full Q/A … : Transmission cooler leak was trying to get it home it cut off an now it won’t start it acts like it needs a jump what do I need to

Car won’t start. The check engine light, battery light, and oil change light are coming on. I tried jumping the car and nothing happened. Why won’t my car start?
ANSWER : Hi and thanks for contacting Your Mechanic. If sometimes your vehicle will start with the new alternator and sometimes it won’t, then there is a loose connection in your charging system. Check all of the wires to the alternator and to the battery. Make sure that the battery cables are clean and tight. Make sure that the wires to the starter are clean and tight. A loose ground to the ignition system will cause the vehicle to not crank over. Check all of the ground wires from the battery to the starter. Make sure that they are clean and tight. If you need further assistance troubleshooting your no start situation, then seek out a technician, such as one from Your Mechanic, that can assist you.

Read Full Q/A … : Transmission cooler leak was trying to get it home it cut off an now it won’t start it acts like it needs a jump what do I need to

Car won’t start and immobilized light flashes
ANSWER : Try using an alternate key if you have it. If it starts easily with another key, then the first key is faulty and has to be replaced. If it behaves the same with any key, then it is possible it has a bad ignition switch or possibly a bad pcm – Power Control Module. Use the fuse box diagram and search for PCM fuses. There are two of them I believe. If either is blown, then that’s a sign there is either a bad connection or short at the pcm connector(s) or the pcm itself. If you would like, a certified technician from YourMechanic can come to your home or office, and make possible replacements to your ignition switch and inspect your wiring.

Read Full Q/A … : Transmission cooler leak was trying to get it home it cut off an now it won’t start it acts like it needs a jump what do I need to

My car won’t start. Diagnostic test read P0420 catalyst efficiency below normal (bank 1). Could this be why it won’t start?
ANSWER : Hi there:

When the oxygen sensors have a reading that is similar to each other, it is an indication that the catalytic converter is not working as efficiently as it is intended. If the voltage of the downstream oxygen sensor decreases, and begins to fluctuate like the upstream oxygen sensor, it means that the oxygen levels are too high and the Power Control Module will then store the P0420 trouble code and can be the source of the hard to start issue you’re experiencing. In many cases, this error is caused by a damaged exhaust pipe, faulty O2 sensors or other mechanical issues that need to be inspected by a professional mechanic during a car is hard to start inspection.

Read Full Q/A … : Transmission cooler leak was trying to get it home it cut off an now it won’t start it acts like it needs a jump what do I need to

Eric smoalih

I am a certified master technician with the National Institute for Automotive Service Excellence (ASE), and I have been working as an auto mechanic for over 15 years. I am passionate about my work, and I take great pride in helping people keep their cars running smoothly.