Join Date: Sep 2017
Location: Outside of Philadelphia
Re: 66 327 200-4R Rear Gear?
When you say "automatic lock-up", what do you mean? Does your trans shift 1,2,3,4, then locks up, or does it lock up immediately when it goes into 4th? I used to have this issue with my Camaro, even with 3.73's, before i stopped it from going into 4th immediately. I know some people dont want to be bothered with it, but i have my lock up on a toggle, even with the vac switch, it would still lock up at like 40 mph, and thats too low. so i just keep it off unless i am on the highway. i think i remember the 4l60E wouldnt go into lock up until 48 mph, if memory serves correct.
When you say surge, is it actually locking, unlocking, locking over and over? I dont think a gear change is going to fix that.
My Monte Carlo has 3.08 gears, and a 2004R, i let her run through 1-4 on around town stuff, and lock it up on the highway. My car doesnt do alot of awesome things, but it does run down the highway at 70-75 mph right around 1800-2000 rpms.