View Single Post
Old 03-17-2011, 12:52 AM   #1 (permalink)
Master EcoModder
vacationtime247's Avatar
Join Date: Dec 2010
Location: Crescent City, CA
Posts: 284

The Toylet - '87 Toyota Supra 350 Chevy V8 / 700R4

In-Durrrr-Oh - '09 TMEC Enduro TMEC 200cc Enduro
90 day: 60.9 mpg (US)

Tem-poo - '86 Ford Tempo GL 4 Door 2.0 Liter Diesel 5 Speed
90 day: 47.52 mpg (US)

Ass Tick - '01 Pontiac Pontiac Aztek GT 5 Door

Green Baby Poop Stain - '01 Pontiac Aztek Aztek Base Model

Black Track - '01 Pontiac Aztek GT
Thanks: 14
Thanked 35 Times in 21 Posts
Vacuum Gauge & Automatic Trans Shift X's

Trying to find the best time to shift using the vacuum gauge. '91 Escort Wagon LX. 1.9 liter / automatic. Has 3 shift selectors on the shifter 1st, drive and OD. Typically drive 40-45 mph on the country roads traveling to work, @ the posted speed limit or lower. Quite a few stops, hills mixed with flat land. Last fill up I used the OD selected for the trans and at these speeds (40-45 mph) it would go into 4th / lockup. The vacuum gauge read in the drive range but low at 10-12 inches. This tank I've tried using 3rd gear at 40-45mph and the vacuum is reading much higher. Does this mean the engine is under to much load at these speeds using 4th gear with lockup? Should I always try and keep the vacuum gauge reading at it's highest point or go ahead and let it upshift? Should I keep it locked in 3rd gear since the vacuum gauge reads higher? Confused, explain.

  Reply With Quote