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Old 07-07-2008, 12:26 PM   #7 (permalink)
Master EcoModder
wagonman76's Avatar
Join Date: Jun 2008
Location: Northwest Lower Michigan
Posts: 1,006

Red Car - '89 Chevrolet Celebrity CL 4 door
Team Chevy
90 day: 36.47 mpg (US)

Winter Wagon - '89 Pontiac 6000 LE Wagon
90 day: 28.26 mpg (US)
Thanks: 8
Thanked 17 Times in 16 Posts
Mine provides quite a bit of engine braking when idling in gear. After about 5 seconds, it cuts off the fuel and the engine brakes harder. I lose speed idling down a 6% grade. Good car for the mountains though. Idling in gear at 55 Im at 1500 rpm, same as driving at 45 with the TCC locked. In neutral it runs at 1000 rpm.

I can go quite a long ways in neutral. But Ive only done it sometimes when Im approaching a stop sign, or sharp corner of 25 mph or less. Then it re-engages seamlessly. Otherwise, even when matching revs, I dont like how the trans feels when re-engaging. Saving a little gas isnt worth it if I kill the trans.

So whether its worth it or not to go to neutral to go a few hundred yards, Id say it depends how the trans acts when re-engaging. If it takes like 3-5 seconds for it to decide to get into the right gear and then lockup the TCC, Id think youd waste more gas doing that than having done nothing.

Winter daily driver, parked most days right now

Summer daily driver
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