transmission identification
 

Hi guy just bought a 91 Cummins engine and transmission.. guy said it was a 518. I believe it is from what I looked up but it has the three wire prong . From what I read that didn't happen until second gen . Anybody. Know other wise? Also could it be a gas engine transmission?

Three wire prong is a 618 / 47rh trans. The 518 / 46rh trans is a 2 prong on the valve body
PM me the engine serial number and I can tell you if he told you the correct year

Is the serial number on the timing cover? And is therea serial number on the transmission its self to identify it

There is a part number stamped in the transmission. Normally hard to read.
And yes the engine serial number is on the timing housing

Engine number-44562155 or. Ref number 53007903-D Idk which one u need. And which number and where at is the one on the transmission

Engine was built Sept 1990. So it shouldn't be a lock up style trans. Measure how think the engine adapter plate is. They are thicker for the lock up converter

Looks like 2 1/2 inches

Not a 100% sure but I believe that is the adapter plate for the 618/47rh and nv4500 trans. I think the 46rh non lock up engine plate is only 1 3/4" thick.

Do you know if there is another way to verify that? And is the 47rh better or worse

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