sevillests Posted June 25, 2005 Report Share Posted June 25, 2005 while driving at around 100 k/m an hour (60m/h) in 4th, my rpm is at 2000 give or take .then it seems to rev to 3000 rpm while doing the same speed! if i let off and coast the rpms drop to 1300, when i give it gas the rpm goes back to 3000 with no feel of power until i hit 3000rpm. if i shift it to 3rd the rpm goes up 200to300 rpm. when i go back to 4th it drops to 2000 again , but within 10 seconds it slips out again.....i noticed to on the first start of the day it gives a strong thump or bong you can feel, at first i thought it was the a/c coming on, but the next time it happend the a/c was off.also when shifting from park and just ideling out the drivway i feel like the clutch lets go . any help would greatly be helpful ....thanks thomas...p.s. no codes came up . Link to comment Share on other sites More sharing options...
adallak Posted June 25, 2005 Report Share Posted June 25, 2005 while driving at around 100 k/m an hour (60m/h) in 4th, my rpm is at 2000 give or take .then it seems to rev to 3000 rpm while doing the same speed! if i let off and coast the rpms drop to 1300, when i give it gas the rpm goes back to 3000 with no feel of power until i hit 3000rpm. if i shift it to 3rd the rpm goes up 200to300 rpm. when i go back to 4th it drops to 2000 again , but within 10 seconds it slips out again.....i noticed to on the first start of the day it gives a strong thump or bong you can feel, at first i thought it was the a/c coming on, but the next time it happend the a/c was off.also when shifting from park and just ideling out the drivway i feel like the clutch lets go . any help would greatly be helpful ....thanks thomas...p.s. no codes came up . How about codes? The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
sevillests Posted June 25, 2005 Author Report Share Posted June 25, 2005 no, no codes came up Link to comment Share on other sites More sharing options...
sevillests Posted June 25, 2005 Author Report Share Posted June 25, 2005 hey scotty, what are your thoughts? Link to comment Share on other sites More sharing options...
jhall Posted June 26, 2005 Report Share Posted June 26, 2005 Guys, This sounds like the torque converter lock-up control is kicking out doesn't it? Link to comment Share on other sites More sharing options...
Ranger Posted June 26, 2005 Report Share Posted June 26, 2005 No. Torque converter lock up would only vary RPM by 200-300 as I recall from Guru. Link to comment Share on other sites More sharing options...
navion Posted June 26, 2005 Report Share Posted June 26, 2005 It almost sounds like a solenoid that has cracked, but not broken off entirely. Check the transmission fluid level first. If the fluid level is OK, then I would check for broken solenoids. Britt Britt Link to comment Share on other sites More sharing options...
adallak Posted June 26, 2005 Report Share Posted June 26, 2005 sevillests, read this thread up. Pay attention to bbobynskis advise concerning checking VCC engagement. http://caddyinfo.ipbhost.com/index.php?showtopic=4642&hl= The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
sevillests Posted June 26, 2005 Author Report Share Posted June 26, 2005 the fluid level is ok, it dosnt smell burt , just well used. its not a good red color nor is it brown. i have never changed it . like i said no codes came up and i did the check a number of times. the car has only 116800 miles on it . i very rarely drive it hard, and it dosnt burn a great amount of oil. Link to comment Share on other sites More sharing options...
adallak Posted June 26, 2005 Report Share Posted June 26, 2005 the fluid level is ok, it dosnt smell burt , just well used. its not a good red color nor is it brown. i have never changed it . like i said no codes came up and i did the check a number of times. the car has only 116800 miles on it . i very rarely drive it hard, and it dosnt burn a great amount of oil. Did you check VCC engagement? It's an easy test. The saddest thing in life is wasted talent Link to comment Share on other sites More sharing options...
stsjoe Posted June 26, 2005 Report Share Posted June 26, 2005 could be a bad solinoid, any way you can drop the pan to check? If not do you know a shop you would trust to check it? (not someone who who would tell you its broke without even checking it!) Doubt its the VCC the RPM's should only go up 50 to 100 rpm's Good Luck Joe Link to comment Share on other sites More sharing options...
navion Posted June 26, 2005 Report Share Posted June 26, 2005 while driving at around 100 k/m an hour (60m/h) in 4th, my rpm is at 2000 give or take .then it seems to rev to 3000 rpm while doing the same speed! if i let off and coast the rpms drop to 1300, when i give it gas the rpm goes back to 3000 with no feel of power until i hit 3000rpm. if i shift it to 3rd the rpm goes up 200to300 rpm. when i go back to 4th it drops to 2000 again , but within 10 seconds it slips out again.....i noticed to on the first start of the day it gives a strong thump or bong you can feel, at first i thought it was the a/c coming on, but the next time it happend the a/c was off.also when shifting from park and just ideling out the drivway i feel like the clutch lets go . any help would greatly be helpful ....thanks thomas...p.s. no codes came up . The changes in RPM is too great for a VCC problem to cause. I would check the solenoids as the symptoms seem to point in that direction. The transmission will show different responses depending on which solenoid fails. I have had a solenoid fail and it was limited to 2nd gear. I have read of others that were limited to fourth gear. If the solenoid body is partially broken, it could have symptoms like Sevillests is describing. Britt Britt Link to comment Share on other sites More sharing options...
sevillests Posted June 26, 2005 Author Report Share Posted June 26, 2005 are the solenoids hard to change? Link to comment Share on other sites More sharing options...
stsjoe Posted June 26, 2005 Report Share Posted June 26, 2005 No, not hard, just drop the pan and you'll be looking at em Link to comment Share on other sites More sharing options...
sevillests Posted June 26, 2005 Author Report Share Posted June 26, 2005 based on the description of my problem , which solenoid would you think it is?or how would i be able to tell? thanks thomas Link to comment Share on other sites More sharing options...
navion Posted June 26, 2005 Report Share Posted June 26, 2005 If you are losing 4th gear, it will probably be the "A" solenoid. The solenoids come in a kit. The kit has two new style solenoids, a retainer bracket and a bolt for the bracket. If you drop the pan and remover the pickup screens, you should see a wiring harness that comes from the left side toward the center of the valve body. The items that the wiring harness attaches to are the shift solenoids. If one of the solenoids seems loose then it is probably cracked at the base. This is not an extremely difficult repair. But it does take some patience and expertise. A GM service manual for the particular year is a MUST have. The valve body must be dropped and partially disassembled to replace these solenoids. There are EIGHT check balls in the valve body that will drop out. They MUST be reinstalled properly. I was able to remove the channel plate from the spacer plate/gasket assembly and not disturb the check balls. I did this by being careful NOT to have the assembly upside down when I took it apart. This way the check balls remain in position in the channel plate. Being careful not to invert the channel plate until it is reassembled to the spacer plate/gasket assembly will insure that the check balls are in their proper positions. The other trick is using a piece of .020 to .030 shim stock to hold the LO/Reverse band in position while reinstalling the valve body. This is explained and a drawing showing how to insert the shim stock is in the manual. Also, there is a wealth of information on this subject in the archives. Britt Britt Link to comment Share on other sites More sharing options...
barberben Posted June 28, 2005 Report Share Posted June 28, 2005 Have you had any problems with 1st gear? Link to comment Share on other sites More sharing options...
sevillests Posted June 29, 2005 Author Report Share Posted June 29, 2005 no, no problems with 1st gear and no codes Link to comment Share on other sites More sharing options...
sevillests Posted July 1, 2005 Author Report Share Posted July 1, 2005 any other input on this problem Link to comment Share on other sites More sharing options...
stsjoe Posted July 1, 2005 Report Share Posted July 1, 2005 Seville, you won't get a code, at least not on the 'noids, if you don't have the time to drop the pan take it someone you trust. I had the same problem about 2 years ago, would hold 4th for a few seconds then drop to third the shop swore 4 gear was cooked and wanted 2800 to rebuild it, I wound up getting one out of a wreck and had a friend install cost a grand start to finish. Hope you do better Joe Link to comment Share on other sites More sharing options...
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