What is the difference between an 84 300SD tranny and an 85? - Page 2 - PeachParts Mercedes-Benz Forum

Graplr · #16 09-26-2008, 02:33 PM

Quote:

Originally Posted by 85300DT

What electronics? There are none. That tranny will work fine. Just remember to properly seat the torque convertor before mating up the bellhousing to the block..

There are about 4 cables I took off my transmission when I removed it. The hook-up for the starter lock. The electronic vs mechanical speedometer. The kick-down cable. And I was told there was one more on the 85 tranny.

My 722.120 transmission that I had hope to use only had a hook up for the mechanical speedometer cable. The 722.303 electrical sender would not fit on the 120, so it was incompatitble. I worried the same would happen if I didn't use an 84.

Hit Man X · #17 09-26-2008, 03:12 PM

SOME '85 cars (such as my 300SD) still have an '84 style trans WITH the '85 emission stuff added. The '85 only have a different pan with gasket too. I basically have a CA emission car from '84 and older.

'85s also sound diff at idle and seem to have a leaner calibrated IP.

Stick with something you know will fit properly.

Graplr · #18 09-26-2008, 04:13 PM

Quote:

Originally Posted by Hit Man X

SOME '85 cars (such as my 300SD) still have an '84 style trans WITH the '85 emission stuff added. The '85 only have a different pan with gasket too. I basically have a CA emission car from '84 and older.

'85s also sound diff at idle and seem to have a leaner calibrated IP.

Stick with something you know will fit properly.

Thanks for the info. I know the 83 I ordered will physically fit, bolt in and be functional. I'm just hoping I won't have to swap anything, but I won't know for sure until I recieve it.

85300DT · #19 09-26-2008, 05:40 PM

You should look for a 722.315 out of the 300d Turbo (1985) then. That has a mechanical drive. The 722.120 was out of the w116 300SD's.

Hit Man X · #20 09-27-2008, 07:53 AM

Quote:

Originally Posted by Graplr

Thanks for the info. I know the 83 I ordered will physically fit, bolt in and be functional. I'm just hoping I won't have to swap anything, but I won't know for sure until I recieve it.

Good deal. '85s also have different starters for different emissions.

So I just order '84 stuff for my SD