1998 bmw 740il transmission problem help please - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 01-30-2009, 03:52 AM
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Unhappy 1998 bmw 740il transmission problem help please

PROUD OWNER of a 1998 bmw 740il and my transmission stop engaging in ever gear. i notice that its leaking transmission fluid in the front... and i think its the transmission cooler lines. but my question is if there no fluid in the car is it not going to engage in any gear? and is there anything i can do to get my car running.. can someone help me??????
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#2 (permalink) Old 01-30-2009, 04:03 AM
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This does not sound good, firstly didnt you notice the leak before ??, all I can say to try is : get some fluid in it, which is easier said than done!,as normally you put them up in the air on a 4 poster, as its pumped in to the side of the box, so basically you'll have to get it transported to a garage and push it on the lift, if you tow it no more than 40mph and 70miles in 'N', I dont think its possible to do without getting it up in the air as it has to be level.

If it still doesnt work after the above it maybe the selector switch, if this is changed and still no luck its a box rebuild or replacement.

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#3 (permalink) Old 01-30-2009, 04:06 AM
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what happened is when it went out it started leak so it could have been leaking for a long time.. i just want to know is it a possildly that it can be the transmission cooler? and does that sound right.. i love my 740 and i dont want to sell it

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#4 (permalink) Old 01-30-2009, 04:16 AM
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I dont know without looking at it, You need to get the fluid level checked in the box 1st.

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#5 (permalink) Old 01-30-2009, 11:48 PM
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theres none in the tranny..

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#6 (permalink) Old 01-31-2009, 03:26 AM
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someone help me please

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#7 (permalink) Old 01-31-2009, 05:40 AM
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None in the there, well you need to get some in there, and hope you havent fried the box.

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#8 (permalink) Old 01-31-2009, 06:31 AM
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have you ever heard of this before? and if you have can you tell me some of the thing that happen.

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#9 (permalink) Old 01-31-2009, 08:10 AM
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Yes I have, all that I can say is you have a 50/50 chance, thats the bottom line I'm afraid, the last one I knew of was fried, the one before that was 100% good, so its just a matter of get the fluid in and see, when you do, put in 'N' and let it warm up for 15 minutes before you attempt to try the shift.

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#10 (permalink) Old 03-11-2010, 12:39 PM
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i have a 1998 740il that does not want to engage in to R or D the way it normaly is, no ATF is leaking.. it also makes noise and have to gas it if I want to get it going

What can it be? pls. help anybody (?) how do i post this to everybody??
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#11 (permalink) Old 03-12-2010, 10:22 AM
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Do you mean you put it in D or R and have to rev it high to get moving??

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#12 (permalink) Old 03-12-2010, 12:17 PM
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Unhappy

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Do you mean you put it in D or R and have to rev it high to get moving??
Yes, then it makes this loud noise and the tranny sort of jumps into gear (drive or reverse) after that it runs fine till I came to stop and have be careful by maintaining it in drive.. I noticed that if I step on the brakes hard or hold like that it doesn't jump or pops into gear(drive/reverse).. please help
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#13 (permalink) Old 03-12-2010, 12:49 PM
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Do you have a message 'Bong' up in the speedo cluster?, so how high do you have the revs before it starts to pull away? and does the whole car shake?

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#14 (permalink) Old 03-12-2010, 01:50 PM
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Do you have a message 'Bong' up in the speedo cluster?, so how high do you have the revs before it starts to pull away? and does the whole car shake?
No, there is no Bong up message. I have to rev it to in between 1500 and 2000RPM and the car shakes loudly when it stars going.. but when I am cruising I have no problems..??
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#15 (permalink) Old 03-12-2010, 03:35 PM
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It sounds to me like the lock up clutch in the torque converter,I would advise you cease driving the car....if it is the T/C the box will have to come out to replace the T/C, if you continue to drive it you will wear out the forward drive clutch very quickly which will result in a total new/ replacement box...which of course you may already have worn the box considerably.

My advice is source a 2nd hand box including the T/C, but confirm the box has done under 100k, you will also have to do a fluid and filter change, I have the instructions if required.

Please do wait for other opinions...

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