1992 300sl transmission compatibility question..,..
 

1992 300sl transmission compatibility question..,..
post3d this over in the sl forum as well...
would the trans from a 1990 300se or a 1990 300e work in the '92 sl?
i'm trying to decide if fixing the sl is viable and it would be more so if i had the trans for it already here.
thx in advance
gh

From doing research on my 91 300SL, it is likely that any 722.5 5 speed auto will work as would a 6 cylinder 722.3 4 speed auto with a drive shaft change. Unless someone offers bolt specific reasons why, I'd say the 300SE is a go.

Using car-part dot com , the universe appears to be 3 transmissions in the 90 to 93 span then 94 to 96. However, the differences may only be valve body calibration / part number or some internal difference.

When you search on car-part, use 300SL for 90 to 93 searches and SL class for 94 to 96. ( The 97 SL320 got the 722.6 electronic shift 5 speed )


The 722.5 5 speed in your car is a 722.3 4 speed with 5 th in the tail housing. The 722.5 appears to be a inch or two longer overall, not sure if the trans mount is in the same place or not.

The M103 / M104 did come with a 4 or 5 speed so bell patterns will interchange.

Near as I can tell, the 5 speed was not very common and only used in higher end small motored cars like the 300SL, SL320 and 300SE, the V8 never got the 5 speed because it has reduced torque capability. I'm not sure the 90 300E was a 5 speed.

These trans have a electrically operated 5 th and a solenoid to reduce governor pressure to delay upshifts so the cats warm up quickly.

If you have a quick look on EverythingBenz - Mercedes-Benz Forum and Web Search Using Google

you can see that the 300SL had both a 722.352 and a 722.500 transmission option - which one do you have? The 300SE had a 722.351 as well as a 722.319. Check the differential final drive ratios - cross your fingers and hope for the best!

you could just bite the bullet and put a stick in. Shifter and clutch should be the same as a W124; so much other stuff is. -CTH

i did a 5 speed swap in a bmw 745 turbo about 5000 dollars ago and swore i'd never make that mistake again......which, loosely translated, means i've been thinking about doing it with this car....

so now i've had a chance to look under both cars...300se has 722.351 and 300sl has 722.500....

So what are you gonna do then?

i don't know if se tranny will be the same...i know it works