We'll I've gotten around to looking at my car and it would appear that my
700R4 is perpetually stuck in Drive, even when I start it or put it in park I can feel it lurch forward. Took it for a drive yesterday and it changes through all the gears just fine, no funny noises. I've been doing some research lately and it would seem that alot of people have accidently done what I have done and worse, I've heard of people hitting reverse at 60 MPH and guys at junk yards with truck deliberately running down the road then slamming it into reverse until the truck eventually stops and starts going in reverse, with a lot of smoke according to eye witnesses.(All were 700r4 stories) Here was a comment
So now that I've determined it's not so much a 'no reverse' problem but always in drive problem my console goes P R N 1 2 3 OD, after reading the info below it may be a case of the internal linkage on the rooster comb has jumped a tooth, I'm putting it on the ramps to day and I want to pull the pan and see what kind of carnage awaits me. Hopefully all will be good and it will be that simple. I'll post a link to some pics if someone here is knowledgeable enough to see if the internal linkage looks ok.
Thanks in advance Moondoggie
Here's a post I found in an other forum that gave me some hope:
Since you said it's stuck in "drive", I'm assuming it's an automatic. Most likely it's the 700R4 overdrive, but the following advice is good on any GM automatic. First, crawl under while someone runs the shift lever through the gears(while holding the brake of course so you don't get run over) and make sure the linkage to the drivers side of the transmission is all still hooked up. If so, it's internal. Then you need to go to a parts store and buy a filter kit which includes a pan gasket and filter(you'll be pulling the pan so just as well change the filter while it's off). Take the pan off, with a drain pan underneath to catch the fluid of course(leave two bolts in and remove the rest to allow the pan to drop at an angle and slowly loosen the remaining two bolts to drain the fluid out of one corner before taking the pan off completely). Then, remove the pan and look at the inside of the transmission case where the shift linkage shaft goes in. There is a deal on there called a "rooster comb" with detents that help each gear to be felt. This "rooster comb" is held onto the shifting shaft with a nut. The nut may have come loose. Also, there is or should be an 's' shaped "wire" link from the rooster comb to what's called the manual valve, which is on the driver's side of the valve body(the valve body is the square-shaped cast iron piece that's bolted to the bottom of the aluminum transmission cast with a dozen or more bolts). If the nut on the shift shaft has come loose, this s-shaped link may have fallen off. This would cause the manual valve to not be moved when shifting and the transmission to remain in one gear. If all this looks and moves like it's supposed to, then the problem is deeper and will need to be taken to someone who can check the tranny's internals. If you do find the problem, fix it, clean and reinstal the pan(use just the gasket with no sealer) and refill the transmission fluid and you'll be back in business. Hope this helps!