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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Oct 2003 Posts: 5,152 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Oct 2003 Posts: 5,152 | One more difference in the 4L80e is that they are all computer controlled, there is not 4L80.
The TH400 was an option in your '73. I'm not aware of an HD version of the TH400, but there is a TH475 that is a little stouter and has support for an output shaft mounted emergency brake. The gearing in that TH475 is a little different is I remember correctly.
I would wonder if the valving would be different in a transmission setup for a Diesel. The torque band is lower and if the transmission was tailored for that motor it may seem to shift too soon behind a gas powered V-8.
I must admit that while I own a couple of them I don't really know a lot about them.
1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble... | | |
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