Transmission ID

[GreenMachine]

I'm needing help identifying this transmission. It appears to be a small block 727 from a car. The part # doesn't come up on an internet search. It's PK4131552   9890   7962. The first 1 is faint and could be something else.

[John_Kunkel]

9890 is the build date August 28, 1988 so it's an '89 model year small block 727. The tailhousing is 2WD  truck. The input shaft is covered so I can't tell if it's lockup or not.

[GreenMachine]

Thanks for the info. It has the bosses for the floor shift is why I thought it was from a car. Here's a pic of the input shaft, non lock-up?

[RECHRGD]

I'm confused.  Isn't a small block torqueflite a 904?  Is there such a thing as a small block 727?

[fy469rtse]

not as common , but yes small block 727 considered heavy duty,

[areibel]

not as common , but yes small block 727 considered heavy duty,

Yeah, I've seen a few in SB trucks, but normally they're found behind a 340 in place of a 904.

[John_Kunkel]

Considering that the big block was discontinued in '78 and the small block soldiered on for another 20+ years, the SB 727's undoubtedly outnumber the BB 727's.