1967
1968
1969
1967
1968
1969GM Automatic Transmissions
The TH350 is a medium duty trans built from 1969 to 1989. It
was used behind 6 cylinder and small V8s engines and was designed to
handle up to 425 pound feet of torque. The TH375B is a heavy duty TH350.
The 700R4 in 1992
became the 4L60. Later the E was added to mean electronic shifting.
For those who are wondering...
The 4 is 4 speed, L is longitude, (rear wheel) and 60 is a rating for
strength. The higher the rating the stronger the trans. The 3L80 is
a renamed 400. The 3L80HD is a 475. The 4L80 is a 400 trans with OD,
and the 4L80E is electronic.
The 2004R and the 700R4 have overdrive planetary gears and use a lock
up converter. The 2004R and the 700R4 are very close in torque rate.
The 2004R has a deeper OD and deeper 1st, 2nd, and 3rd gears. Anyone
thinking of buying a 2004R, be sure it says METRIC on the pan. If it
doesn't, you're getting a plain 200. Also, in case someone wanted to
know, a "T" in the trans designation means transaxle. (Front
wheel).
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