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Old 08-03-2017, 10:50 PM   #1
1st Gear Newbie
Join Date: Aug 2017
Location: Lethbridge
Posts: 4
2005 745Li tranny help

I've searched several previous 7 series posts searching "transmission", "valve", and "Mechatronic" but thought I'd check in on this diagnosis and estimate from my independent shop. My 745Li is a Canadian delivered and third owner 2005 with 155K kilometres with the 2nd to first gear clunk and occasional hard up-shift described by many.

I took it into my indy for Service 1 inspection a couple of weeks ago as suggested by my dashboard and manual, and asked them to look at that clunk again. I asked them to look at it shortly after buying the car 2 years ago but at that time they said they could find nothing. When I picked up the car they said they'd get back to me on the transmission.

They called today and suggest new fluid (was going to do that anyways before 160K km) and mechatronic valve body replacement at the dealership - estimate of $4700.00! They say neither they nor the local tranny shop they use can get the fluid or the parts, they are available ONLY from dealership in Calgary which is 2 hours away. Does that sound right?? I had a '95 e38 prior to this and had the tranny fluid replaced locally no problem.

There must be something else I can try first before the dealership for $4700. Love the car, but not this diagnosis.

Thanks from Alberta

Ken Rogers
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Old 08-04-2017, 01:07 AM   #2
Bimmer Heaven
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Join Date: Feb 2002
Location: Ontario
Posts: 15,672
Honestly not too many options:
1. Live with it until you can, or sell the car
2. Replace with used transmission and get a few more years out of it.
3. Get transmission rebuilt and get a few more years out of it.

In any case, it won't be cheap, and it may not last very long...
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Old 08-04-2017, 08:14 AM   #3
3rd Gear Member
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Join Date: Dec 2007
Location: Burlington
Posts: 370
Hard shifting from 2nd to 1 and vise versa is a very common problem with these cars. Some fixes I have read over the years are:
FReset the transmission, I think its by holding down the gas pedal for 20 seconds with the car in ignition. Other said they fixed it by updating the software for tranny module at the stealership. Personally I wouldn't touch the fluid at this point as that wont fix your problem.

good luck
Current - 2011 E70 X5 3.5i

2003 745Li Titanium Sliver Metallic w/ Black Interior
21" OEM Style 128, Angel iBright V3 w/ Matching Fogs, H&R Springs, BTUM8000, LED Side/Front Markers, White Bulb Interior/License Plate,
Stealth Bulb Signals, 15mm Rear Spacers, ACS Style Roof and Trunk Spoilers, Debadged
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