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#1
10-25-2010, 11:14 PM
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W126 transmissions...
1991 560 SEL. Going trans shopping. Which ones are compatible? I found an 89 from a 420 SEL at a euro shop for cheap. Should I scoop it up and get rebuilding or keep looking? Milage is 109,000. Price is less than $400.
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1991 560 SEL / 185k miles 1992 750il / 17k miles - project car 
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#2
10-26-2010, 08:52 AM
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Any of the 1986-95 V-8 powered transmissions will fit & work.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#3
10-26-2010, 01:30 PM
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$400 seems high for a trans that claims to be 109k with no documentation... remember VDO odometers fail often in these vehicles.
For a rebuildable core, I would pay $100 max as so many are around in so many applications as MB Doc points out.
__________________
I'm not a doctor, but I'll have a look.  '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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#4
10-26-2010, 02:32 PM
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Well it may already be rebuilt. I have not called to get details on it yet. And its the best price I can find right now. But I do have some junkyards that are not on Car-part.com, so maybe I will have some luck there.
__________________
1991 560 SEL / 185k miles 1992 750il / 17k miles - project car
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#6
10-27-2010, 03:08 PM
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Well I would like to see it in person and transport it myself. But I am going to head over to a place that might have rebuilt crated ones I can get at cost. Probably not, but worth checking. And I have some yards to look at. Big thing right now is compatibility, but boy do I want a 5 speed or something with more efficient gearing.
I will update when I finally get something.
__________________
1991 560 SEL / 185k miles 1992 750il / 17k miles - project car
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#7
10-27-2010, 04:12 PM
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Gearing is not that bad, I have not driven my 560 in a while but I seem to remember cruise RPM @ 65mph around 2300. I guess you could source yourself the taller 2.24:1 diff to drop the RPM a few hundred.
The CIS not not great for fuel economy (all injectors fire at the same time...), nor are the two huge cats on the car, nor is the Y connector of the manifolds that forces the M117 to breathe through a straw. Starting in second gear around town does you no favor for economy either. How old is your O2? The older it becomes, the richer the car tends to run. If all your forward gears are fine, just replace the reverse clutches and reseal the unit while out of the car. You should easily get to 200k+ on the rest of the internals. One of mine is creeping up on 275k.
__________________
I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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