[Greg Reimer 7376]

I always have subscribed to two philosophies in life, personal mottoes if you will, one being that if you didn't learn something new each day, you've wasted the day. The other personal motto is the saying"Success is the best revenge".
I decided to assemble some transmissions that I have around the place, and needed to check for a stuck pressure reg valve in one that lost trans oil pressure, so I disassembled the valve body. The previously posted exploded view of the PG OEM valve bodies came in handy. The fact that there were two different manual valves concerned me. I slipped the manual valve out of the valve body I was working on and looked it over, everything was OK, no binding in the valve body, etc. but any Glide guy knows that the valve body has two parts, both cast iron, with a date code in the casting right below the OEM part number. I got curious, went into my store room where there is a couple of plastic milk bottle crates full of PG small parts, and I dug out a couple of valve bodies and brought them out front for evaluation.Here's what I found:


The upper castings were all part number 3847715.The four that I looked at were cast on
C 10 3, E 27 8, F 15 4, and A 23 7.

The lower casting, the main part of the valve body that bolts to the trans case, had GM part number 3819476. The date codes on these 4 were:
6 9 3, F 13 8, F 18 4,and C 27 7.

This indicates two early transes with a rear pump, and two late ones without a rear pump.

The next comparison was when I took the spool valve(manual valve), out one at a time, for comparison. The two later (post 66) glides had the spool valves with the slender spool about 2/3rds of the way back, the other two had the spool valves with the wide spools all the way back.

The rear pump disappeared in mid 66 or so, I never really took one of those apart to verify it. If I come up with a core with the valve bodies cast in 1966, I'll check and see which manual valve it has.
It would probably be wisest to stay with whichever spool valve you currently have rather than switch them and discover you now have a problem where you didn't have one before.

Some time ago, one of our local racer friends came up with a 69 Camaro convertible with a 250 inch 6 cylinder, and a cheap version of the Glide called a Torque Drive. It was a manual shift trans with no governor, passing gear accommodations, and no automatic upshift at all. I would have liked to dissect it and inspect what made that one different, but I never got the chance. Those transes were rare when they were new, so there's no use looking for one 50+years after they were made.

Hope all this helps. I'm no authority on transmissions, there are many excellent ones, but it was interesting learning a few things!!