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chevelle0_2 Nov 16th, 04, 7:01 PM Anyone running a GV Overdrive in thier car? I'm thinking about putting one in my "70 Chevelle this winter and thought I should ask for pros/cons. My car is a sb 450hp 400 turbo with 4.30 gears in the back. Any input would be greatly appreciated. Thanks Brian yanniz Nov 16th, 04, 10:05 PM I do in my '68....I love it...with the 400 unit 3.89 gears, I think I was cruising at 2200 rpm or so...I do not have an engine in my car now, and I only drove it for about 500 miles with the GV, so I think I remember pretty well the cruising rpms... knudsonm Nov 17th, 04, 9:11 PM what brand and stall is your converter? High stall speeds and low cruise RPMs cause lots of heat. chevelle0_2 Nov 18th, 04, 6:00 PM TCI 3000-3400 stall. 4.30 gears in the back @ 3000 rpms should be about 56 mph in 3rd and about 70 mph in 3rd overdrive. Do you know if synthetic oil is better for heat?? Whittaker Nov 21st, 04, 4:55 AM i have one in my 66 behind a TH 400. Love it so far. RedSS454 Nov 21st, 04, 10:37 AM Originally posted by chevelle0_2: Do you know if synthetic oil is better for heat?? My tranny guy says never to use synthetic in older cars trans or rears because it is to slippery (sp?) for the gears to grab. Just my guys $.02. What do you tach at 70 with the 4.30's? I am considering swapping and am gathering all the input I can, Thanks, Chris | ||