edwardzracing
July 26th, 2011, 03:57 PM
Well I'm sick and tired of trying to fight this transmission of mine and I'm sick of it not shifting so I'm here asking if anybody out there might be willing to share a tune that they know WORKS with their combination (assuming it's close to mine).
First I'll give a rundown of my setup.
'98 Camaro (99+ PCM conversion)
4L60E (mild build)
4000 Stall
4.11 Gears
Now the problem I am having is that the transmission will not shift at high RPM's. I'm starting to think it might be slipping the moment it tries to command the shift, but I'm not sure. Can someone please tell me what things I should log to see if the shift is being commanded??
I know my next request is a long shot, but I'm taking the long shot anyways. Does anybody have a similar setup as above, 4l60e with 4.11 gears, and have their car tuned and shifting correctly at say 6000 RPM? I tried lowering my WOT shift RPM's down to 5800 and it still will not shift under WOT. It shifts fine cruising around, but refuses to shift out of 1st or 2nd when under WOT.
If someone can share their tune, it'd be greatly appreciated... I'd love to compare my tune to someone else's to see what might be different. Now I have a good sized cam, and decent heads, a fast 90/90 combo and a high stall converter as well, and I understand all of this factors in, but c'mon, the damn thing should shift at 5800 RPM unless something is seriously wrong in the tune or I have a mechanical issue. I figure if I can get someone's good working tune... and the problem persists, I can probably blame the issue on a mechanical issue or lack of transmission fluid. Whatever the case, I'm desperate for help. I did increase the shift pressures, but not dramatically. I don't know for sure if the transmission has a shift kit in it or not, but would increasing the pressures cause the transmission to NOT shift with a shift kit?? I'm beyond lost at this point... I'm the first to admit I'm not that great at tuning, but if someone can share their good working tune with a similar setup, I'd love to see where my numbers are at versus theirs. BIG THANKS to anyone willing to help. Thanks to all those that took the time to read my repetitive post, lol. This forum is top notch.
Brad
First I'll give a rundown of my setup.
'98 Camaro (99+ PCM conversion)
4L60E (mild build)
4000 Stall
4.11 Gears
Now the problem I am having is that the transmission will not shift at high RPM's. I'm starting to think it might be slipping the moment it tries to command the shift, but I'm not sure. Can someone please tell me what things I should log to see if the shift is being commanded??
I know my next request is a long shot, but I'm taking the long shot anyways. Does anybody have a similar setup as above, 4l60e with 4.11 gears, and have their car tuned and shifting correctly at say 6000 RPM? I tried lowering my WOT shift RPM's down to 5800 and it still will not shift under WOT. It shifts fine cruising around, but refuses to shift out of 1st or 2nd when under WOT.
If someone can share their tune, it'd be greatly appreciated... I'd love to compare my tune to someone else's to see what might be different. Now I have a good sized cam, and decent heads, a fast 90/90 combo and a high stall converter as well, and I understand all of this factors in, but c'mon, the damn thing should shift at 5800 RPM unless something is seriously wrong in the tune or I have a mechanical issue. I figure if I can get someone's good working tune... and the problem persists, I can probably blame the issue on a mechanical issue or lack of transmission fluid. Whatever the case, I'm desperate for help. I did increase the shift pressures, but not dramatically. I don't know for sure if the transmission has a shift kit in it or not, but would increasing the pressures cause the transmission to NOT shift with a shift kit?? I'm beyond lost at this point... I'm the first to admit I'm not that great at tuning, but if someone can share their good working tune with a similar setup, I'd love to see where my numbers are at versus theirs. BIG THANKS to anyone willing to help. Thanks to all those that took the time to read my repetitive post, lol. This forum is top notch.
Brad