The gas T19 had different gearing, I have a T19 from a 83 or so 2WD 460 F250, I don`t know the exact ratio, but by putting the trans in first and counting revolutions, it appears to be about 5.00 low gear. I bought the T19 to put in my old 74 F350 car hauler, which is a NP 435. Since my 74 typically weighed in at over 10,000 pounds, I would normally start off in 1rst gear unless it was dead level, but 1rst was only good for maybe 15 MPH, 2nd for maybe 25 without revving the 390 to the moon. I did find the granny low 1rst gear rather handy when stuck in bumper to bumper gridlock, like when in a long border line up, I would just let the engine idle in 1rst, and the truck would just crawl at a slow walking pace. I put a new clutch in when I rebuilt the 390 in 1990, almost 30 years later, the 11" clutch is still working fine. I was going to swap the T 19 simply to have a syncro`d and more useable 1rst gear, but I sold the truck over 3 years ago, and never did the swap. If somebody wanted my T19, I would sell it for 100 bucks, but being so heavy, I don`t want to deal with shipping it. But if somebody in BC Canada or Washington State was interested, I could deliver it to Mission Raceway, or Bremerton or Pacific Raceway when I am down for a race.
