55PACKARD Posted April 18, 2004 Share Posted April 18, 2004 I think my trans is going im not sure...When i start the car its great but after a while when it warms up it seems like i have to give it more gas to get it to move i mean it goes into gear and everthing it just seems like i have to give it more gas to move almost like it might be not grabing or not reacting to the thorttle any ideas... Link to comment Share on other sites More sharing options...
Guest imported_Speedster Posted April 18, 2004 Share Posted April 18, 2004 If you are sure the engine is reving to high enough RPM and producing enough power, then probably it is transmission problem. But it may not be inside trany, (clutch-disk, bands, etc.) I've heard that can be caused by a defective torque-converter. If it is converter, and since that converter can be taken apart, it may be easier to repair than overhauling complete transmission. One way to test the driveline is to put back end of car on jack-stands and let trany shift thru gears with back wheels off ground. This will let you know if everything is working okay without much load on the driveline. Link to comment Share on other sites More sharing options...
55PACKARD Posted April 18, 2004 Author Share Posted April 18, 2004 I know for a fact the trans shifts i just wanted to know why when it gets hot or when i do some long drives with it,it seems to take a little more effort to move it but if i put it in low gear in moves out fine and then i shift it to high gear then it seems to be ok...Im just was curious what it was.... Link to comment Share on other sites More sharing options...
52deluxe Posted April 18, 2004 Share Posted April 18, 2004 im gonna take a wild stab in the dark here, but do u run dextron III? i used to and based on some advice and info posted on this forum i went to ford type F and have never looked back. i seemed to have a similar problem that was only noticable when hot and have not had a problem sence. i also added some lucas trans fix/sealer because i did have a slight leak "1 quart/200-300 miles" this also seemed to make the direct drive clutch grab a little better. your transmission could also be overheating, i put on a aftermarket transcooler "one for a large pickup" infront of the radiator and ran the lines in the frame rail to the transmission. this cannot be seen unless the hood is up and your looking through the latch hole "even then its hard to see" i even left the original with the lines in place, just cut them right before they go into the trans and clamp them out of the way.just a thoughttom Link to comment Share on other sites More sharing options...
55PACKARD Posted April 19, 2004 Author Share Posted April 19, 2004 You could be right with the trans overheating wasnt that a problem with these transi might be looking into a trans cooler but how do i go about diconnected the stock one i dont want to leave that one hooked up i just want to by-pass and use a heavy duty trans cooler so how would i do this... Link to comment Share on other sites More sharing options...
52deluxe Posted April 19, 2004 Share Posted April 19, 2004 personally i think the trans coolers were very poorly designed, they use the radiator water to cool the trans fluid. this means that the transmission under 100% cooling efficency would never be cooler then the engine temp, i would guess that on a hot day your trans is 25-50F hotter then your radiator water "maybe more if you are in a hilly area." i remember reading somewhere that heat is a major contributor to trans failure and every 10F you cool your trans can add upto 10% life. the only benifit to the original cooler i can find is the radiator water would heat up the trans in the winter which would be easier on the pumps, at least here where it gets -30F or colder. my other concern with the original cooler is what happens when it leaks, antifreeze in your transmission would be the start of a very very bad day. but at the time when the automatic was fairly new it was sufficent for cooling. i have always put bigger coolers on my vehicles for the transmissions and yet to have one fail "knock on wood."just a thoughttom Link to comment Share on other sites More sharing options...
Guest Albert Posted April 19, 2004 Share Posted April 19, 2004 You might want to check the settings of the brake bands in the transmission as they may be slipping causing some of your problems too. Link to comment Share on other sites More sharing options...
WCraigH Posted April 19, 2004 Share Posted April 19, 2004 I agree with 52Deluxe about the stock trans cooler. I removed the one on my 55 Pat and use an air-type mounted vertically in front of the radiator. Just cut the stock tranny lines where they come forward right before they make the turn across the front. Connect the air-type cooler rubber lines there.You can completely remove the stock cooler by replacing it with Goodyear 60706 or equivalent. It replaces both lower hoses and the cooler. Link to comment Share on other sites More sharing options...
55PACKARD Posted April 19, 2004 Author Share Posted April 19, 2004 Thanks guys for the help...So can i just cut the trans lines and run new ones to the trans cooler and just plug the old ones coming out of the old cooler so they dont leak whats left in them??? Link to comment Share on other sites More sharing options...
WCraigH Posted April 20, 2004 Share Posted April 20, 2004 Yes, but use a tubing cutter and at least a single flare on the end because there is pressure in those lines.The reason for removing the cooler is because you still have the possibility of the coolant leaking out. That's a 50-year old assembly of metal and there is probably corrosion and vibration-induced cracks. I removed it on my 55 Pat. However, it is a PITA to get at. Link to comment Share on other sites More sharing options...
52deluxe Posted April 20, 2004 Share Posted April 20, 2004 i just cut the lines and ran a small piece of tubing to each end of the lines coming from the original cooler. this way if it does start to leak internally there is no place for the coolant to go. simple solution if you want that stock look and it only takes about 4" of rubber hose. im also wondering if that gm part number would work on a straight 8?tom Link to comment Share on other sites More sharing options...
55PACKARD Posted April 20, 2004 Author Share Posted April 20, 2004 Thanks guys for your help i guess I'll be under the car soon to mount a trans cooler and run some lines thanks again...'G' <img src="http://www.aaca.org/ubbthreads/images/graemlins/grin.gif" alt="" /> Link to comment Share on other sites More sharing options...
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