On the side of the transmission, the cable goes from transmission control module to the transmission
Shogun tricks and tips for the E32 series are HERE!
Just so we are clear, by EGS I mean the transmission control module. It is usually located either in the e-box or tucked up behind the right hand floor speaker. It might be a wise precaution to disconnect the battery temporarily before you disconnect the plug to prevent any arcing.
Or you could disconnect it at the trans end as Shogun suggests. The result is the same. Whichever you find easier to reach
Last edited by whiskychaser; 02-25-2019 at 05:40 PM.
On the 88 735 the trans control module is RH side of passenger footwell behind speaker panel, control unit A300 (AEGS), see page 7100-17 picture http://shark.armchair.mb.ca/~dave/BMW/e32/e32_88.pdf
But on the German forum I read that some 735 have the trans control module in the e-box in engine bay, seems to be dependant on built year and scops of scupply such as ASC+T etc
Last edited by shogun; 03-20-2019 at 12:41 AM.
Shogun tricks and tips for the E32 series are HERE!
Since nobody has suggested it yet: just feed a tube of small-sized air hose down the dip stick and syphon out some ATF. That’s what I had to do. But first...
Make sure you are checking the ATF level while the tranny is fully hot and the car is running (in park) - as in after a 10-15 mile trip. That’s the only way to measure it accurately, and it sounds like that might be a problem given it’s kinda undrivable.
When the tranny’s cold or the car’s off it will always read high on the dipstick.
i think its 17mm if im not mistaken, find a 17mm stud, with two nuts (both same size or one slightly different is ok) the intention is to create a lock nut, so you put the nut to the end 17mm stud tread, the top nut (end nut) you tighten it, the second nut (middle nut) you loosen it, its better to hold the 17mm hex stud on a vice. tighten both nuts (middle loosen, end tighten so its fighting towards each others direction) to its maximum, now you insert the 17mm hex head of the stud to the drain plug, one hand aligning and making sure its straight and inserted into the drain plug, one hand put a correct size ring or open end spanner, and loosen the second nut (middle nut), the theory is the second nut will try to overcome the end nut, but its being stopped by the end nut thus turning the head of the 17mm hex.
1990 730i M30B30 RHD - Sold
1993 730i M60B30 RHD
Others:-
2012 Toyota Fortuner 4WD 3.0
2012 Kia Optima 2.4L
1990 Suzuki cavalcade (motorbike for hobby)
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this is what i meant, so on the two nuts side, u need to tighten them together, inner nut (middle) u need to hold it or loosen it while the outer nut you tighten it, causing them to oppose each other
when u want to loosen the fill plug, u insert the head of the hex (not the nut) to the fill plug, and u loosen by turning counterclockwise the inner nut (middle) and if you want to tighten the fill plug, u turn clockwise on the outer nut.
i believe the drain plug is 5mm if im not mistaken.
1990 730i M30B30 RHD - Sold
1993 730i M60B30 RHD
Others:-
2012 Toyota Fortuner 4WD 3.0
2012 Kia Optima 2.4L
1990 Suzuki cavalcade (motorbike for hobby)
Any news here?
Just read an interesting thread on the German E32 forum, http://www.7-forum.com/forum/showthread.html?t=234435
in brief the facts
the 4HP22 did not switch into 3rd and 4th gear, even when the engine RPM was >4000
Noticed that he had to high ATF level with engine running and fluid at operating temperature 85 degree C. Checked all solenoid and speed sensor ohms in trans, all o.k., torque converter was changed last year, total km of the trans almost 0.5 million km.
Sucked out of the trans about 0.5 liters, started the car from cold and trans worked as it should.
Too much or not enough ATF in the trans can cause such trouble, Too much ATF causes foaming, cooling effect goes down and the clutch packs do not get enough pressure from the foam mix of ATF and air.
Too low fluid causes similar trouble, then air is sucked with the ATF from the oil pan, same problem.
Shogun tricks and tips for the E32 series are HERE!
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