gp1991 Posted November 28, 2010 Report Share Posted November 28, 2010 It seems as if when i come to a complete or partial stop that my car will slip sometimes. it keeps happening more frequently. once i backed out of my driveway and put the car in drive and the car died. If i stop at a light and then go when it turns green, sometimes the rpms will just go up and then a second later the trans will engage. Anyone have any ideas, the fluid level looks good and the car has 65K. Quote Link to comment Share on other sites More sharing options...
Hairdo12 Posted November 28, 2010 Report Share Posted November 28, 2010 TransX fixes this every time I've encountered it. Valve body is probably gummed up with varnish and crap. Try putting the car in 3, 2, 1 and see if it still does it; usually it will work normally in these gears. When you're reving the motor, the transmission pump builds up pressure and then engages. Get some TransX, drive for 500 miles and then do a pan drop and filter change. Chances are I bet the symptoms improve within 100 miles of driving. TransX is as thin as water, don't use lucas which is thick like molasas. I do not often endorse mechanic in a bottle type fluids, however I've seen this stuff save five transmissions for the remaining life of the car when a transmission shop insists a full rebuilt is necessary. Quote Link to comment Share on other sites More sharing options...
gp1991 Posted December 2, 2010 Author Report Share Posted December 2, 2010 That sounds good i think that ill give it a try and see if it works, if it doesnt, any other ideas? Quote Link to comment Share on other sites More sharing options...
gp1991 Posted December 16, 2010 Author Report Share Posted December 16, 2010 Okay well i took it to a guy that we know who is a mechanic and hes not even sure that it is the transmission. He says it could be a resistor or something. He said also that the throttle body could be dirty or something. I dont know all the details because my dad took it it today because i had school. i do however need a ball joint because one of them is shot. also the mechanic did a diagnostic on it and got the code for the Knock sensor. I dont know if the symptom for when i back out and then go into drive the car completely shuts off could point to anything specific, if anyone has any ideas at all, please post, i wont criticize. oh and by the way i changed the fluid with no success to fix the problem, but thanks for the suggestion. Quote Link to comment Share on other sites More sharing options...
gp1991 Posted December 16, 2010 Author Report Share Posted December 16, 2010 anyone ? Quote Link to comment Share on other sites More sharing options...
RobertISaar Posted December 16, 2010 Report Share Posted December 16, 2010 "resistor or something"? LOLwat? and a knock sensor code will generally cause the motor to run at severely retarded timing, killing power, fuel economy and driveability all at once, which could cause your stalling issue. Quote Link to comment Share on other sites More sharing options...
speedy96z Posted December 16, 2010 Report Share Posted December 16, 2010 I have had this problem in a number of my gm vehicles, all had high miles though. Although i was never able to quite put my finger on it, i was told that the bands in the tranny were stretched. to me that sounds like an old wise tale. i am guessin the clutch pack may be worn. Quote Link to comment Share on other sites More sharing options...
gp1991 Posted December 16, 2010 Author Report Share Posted December 16, 2010 "resistor or something"? LOLwat? I have no idea what he means by that either. Quote Link to comment Share on other sites More sharing options...
gp1991 Posted December 17, 2010 Author Report Share Posted December 17, 2010 I have had this problem in a number of my gm vehicles, all had high miles though. Although i was never able to quite put my finger on it, i was told that the bands in the tranny were stretched. to me that sounds like an old wise tale. i am guessin the clutch pack may be worn. that would make sence because when i come to a stop, and it is not engaged, it will act JUST like it is in neutral, i will roll forward or backward depending on the slope. but then when it engages it shifts fine into second and third and so on. Quote Link to comment Share on other sites More sharing options...
gp1991 Posted December 17, 2010 Author Report Share Posted December 17, 2010 and sorry all for the lack of good explination, the simplest thing i can say is that it is the defenition on the internet of transmission lag. Quote Link to comment Share on other sites More sharing options...
virtuetovice Posted December 18, 2010 Report Share Posted December 18, 2010 Vacuum modulator? Quote Link to comment Share on other sites More sharing options...
gp1991 Posted December 21, 2010 Author Report Share Posted December 21, 2010 i just found out that when i come to a stop, and the transmission does not engage, if i shift into park or neutral and back into drive then it engages, otherwise it takes like 10-15 seconds to do it by itself. any ideas? Quote Link to comment Share on other sites More sharing options...
mra32 Posted December 21, 2010 Report Share Posted December 21, 2010 Is this when its cold or all the time? A filter and new fluid sounds like a good start. I would also take Hairdo's advice and throw some of that trans stuff in there for a while before you do the filter and fluid change. Quote Link to comment Share on other sites More sharing options...
White93z34 Posted December 21, 2010 Report Share Posted December 21, 2010 My old TGP used to do this, never found out why though. Quote Link to comment Share on other sites More sharing options...
Galaxie500XL Posted December 21, 2010 Report Share Posted December 21, 2010 Sounds like low line pressure...bet your filter is gummed up, or, it's allowing air to be sucked up, because the filter isn't sealed against the opening any more. Fluid and filter change, definitely....have also seen vacuum modulators stick, and cause weird issues....they're cheap enough (under $15.00) to make it worthwhile to replace. The big thing, though, is to STOP DRIVING THE CAR until you figure out what the issue is...because if it isn't permanently damaged now, it will be if you keep driving it while it's misbehaving.... Quote Link to comment Share on other sites More sharing options...
GOT2B GM Posted December 21, 2010 Report Share Posted December 21, 2010 seems like it could be a torque converter issue. Quote Link to comment Share on other sites More sharing options...
gp1991 Posted December 21, 2010 Author Report Share Posted December 21, 2010 Thanks, i had the filter and fluid changed about a week ago, so it must be the vacuum modulator? Quote Link to comment Share on other sites More sharing options...
gp1991 Posted December 23, 2010 Author Report Share Posted December 23, 2010 thanks i ordered a vacuum modulator so im just waiting to put that in. Quote Link to comment Share on other sites More sharing options...
Addicted To Boost Posted December 24, 2010 Report Share Posted December 24, 2010 My TGP did this when I first got it, replaced the modulator and check valve and it worked properly afterward. Quote Link to comment Share on other sites More sharing options...
speedy96z Posted December 28, 2010 Report Share Posted December 28, 2010 i have never had this particular problem but if i can take a guess the clutch pack inside your trans may be severely worn. i would have the trans looked at by a certified shop to confirm this. hope this helps you...........speedy96z Quote Link to comment Share on other sites More sharing options...
gp1991 Posted December 31, 2010 Author Report Share Posted December 31, 2010 Thanks everybody, i did all i could with the tools that i have in the garage, but everything that we did resulted in no change. In the end i had to bite the bullet and bring it it and has to have it rebuilt, the clutch pack was worn down and to torque converter was shot, however, everything runs smooth now. Quote Link to comment Share on other sites More sharing options...
thikstik Posted January 1, 2011 Report Share Posted January 1, 2011 (edited) I hate to hear that at such low miles.! Edited January 1, 2011 by thikstik Quote Link to comment Share on other sites More sharing options...
gp1991 Posted January 1, 2011 Author Report Share Posted January 1, 2011 I hate to hear that at such low miles.! me too Quote Link to comment Share on other sites More sharing options...
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