TC Question for Copper
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Joined: Sep 2003
Posts: 4,452
Likes: 1
From: Southern California
Hi Ken:
I have installed the LEDs for the 3-4 shift and Torque Converter clutch lockup (96_4wdr's idea) and here is what I found out for my 4.0L Extended van (the 3.0L is next, but I have yet to tackle the tranny leak, so that has to wait).
The 3-4 shift occurs at about 30-35 mph, and it downshifts at speeds below 30mph.
The TC lockup clutch occurs at about 40-45 mph, depending on whether you ease up on the gas. If you do that, it'll lockup at about 40mph. Once TC lockup occurs, it remains so until you drop to about 35 mph. However, as soon as you take your foot off the gas completely, TC clutch will be release immediately. So, there is no way you can keep it locked up for long in stop-and-go traffic. If you are on the highway, and you are above 45mph, it'll remain locked up.
I haven't tested it out under really heavy load, even though 2 adults and 5 kids with luggages going up the hill on highway 5 near Magic Mountain should be considered a pretty good load in my book. But then the van didn't even downshift, so I don't really know.
I'll post pictures once I got the tranny problem taken care of before the holiday starts.
I have installed the LEDs for the 3-4 shift and Torque Converter clutch lockup (96_4wdr's idea) and here is what I found out for my 4.0L Extended van (the 3.0L is next, but I have yet to tackle the tranny leak, so that has to wait).
The 3-4 shift occurs at about 30-35 mph, and it downshifts at speeds below 30mph.
The TC lockup clutch occurs at about 40-45 mph, depending on whether you ease up on the gas. If you do that, it'll lockup at about 40mph. Once TC lockup occurs, it remains so until you drop to about 35 mph. However, as soon as you take your foot off the gas completely, TC clutch will be release immediately. So, there is no way you can keep it locked up for long in stop-and-go traffic. If you are on the highway, and you are above 45mph, it'll remain locked up.
I haven't tested it out under really heavy load, even though 2 adults and 5 kids with luggages going up the hill on highway 5 near Magic Mountain should be considered a pretty good load in my book. But then the van didn't even downshift, so I don't really know.
I'll post pictures once I got the tranny problem taken care of before the holiday starts.
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FTE Ken
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Aug 29, 2002 09:11 AM
