Hello, My name is Barry Knight and I am Brand New to tuning and to the Forum. I would be extremely grateful for anyone who can assist or help me in this matter. Please bear with me!
1985 CORVETTE
LS6 ENGINE \ 4L60E TRANSMISSION Swap
GM 411 PCM 2002 Corvette Platform
HELP!!!! Please Any Advise, Input, Ideas????
SYMTOMS:
The car starts off in 1ST gear, then swiftly shifts into second gear but If you floor the gas it will stay in second and will not switch to 3rd or overdrive. Sometimes it just slips from one gear to another as you are driving. At high speeds the torque converter just spins and sometimes at low speeds, it jerks in different gears.
I'm baffled? The TPS sensor was checked, not the problem. Changed all 4 switches in the tranny for safe measure, not the problem, check for codes, NO CODES
Keep in mind, this transmission is as good as new. It was totally rebuilt by our resident expert with all new parts at the chevy dealership that I work at.
We looked at a few stock automatic (and manual) tunes and noticed “PN Only” is never used. Seems that the single wire P/N signal, like the F-Body console switch, would have this as an option.
The F-Body has “None” selected for an LS1 with automatic transmission.
Using the “None” option should produce the desired result?
The car is wired to use the same type of gear select switch as the LS1 Camaro/Firebird.
I took the car ta a local tuner who is using hp tuners and we tried just about everything, Changing shift tables, we tried to used the f-body platform, and the corvette platform, the gear ratio and tire height is correct. We tried switching to the truck platform and at least the speedo read properly.
When your going 20mph for instance the laptop says your doing 90mph as an example!
There is a box in HP Tuners for the tranny trans-axle\ rear wheel drive which should be set on "NO" rather than yes but it keeps switching back to YES.
Bottom line is: The car will not shift into 3rd and 4th gear at and stays in 2nd
My Friend Bill Wright, who lives here in Erie, Pa. is an extremely Knowledgeable (HP Tuner) and he also cannot figure this out!! Is there anybody here who is a Master Tuner who this file can be sent to and looked at or tweeked?
I'm trying to get the car in drivable condition to take it over to Hutter Performance in Chardon OH. to have it dyno tuned by Trevor Hutter So it will be show ready in a couple of weeks.
Regards
Barry G. Knight
Erie, Pa