Hive

Hi,

I've been having issues with my vette... mainly a rattle from the transmission, i've done a pan drop and filter/fluid change and it's still there. (95% fcertain this is not a cat shield, heat shield or anything)

It's a 1993 LT1 w/ 700R4 4spd auto

I'm not sure how well the fluid level of the tranny is, but i added 5 quarts to fill and drove it after throwing a new filter, pan gasket on. I drove it for about 5 miles and then let it idle in park for 3 minutes, checked level and it was maybe 1/4 inch over the hot level. This GM dipstick has a mind of it's own for measuring the level,,,

Now when i drive over approx 70KM/h (about 40mph) the service engine light will come on after a few minutes. This happened at night and when it did the lights and dash display dimmed for a very brief few seconds, the lights stopped dimming and the service engine light came on. Since there is a rattle, is it a good bet there is something up with this transmission? Once you slow down to 30-35 the light goes away...

I cant pull codes reliably i believe, can only get it to code while driving over 40mph, i believe this would put it in 4th gear..

any ideas? i'm calling around for a mechanic but would rather go into it knowing possibilities from other vette owners

LCPLPunk

Have you tried the paperclip method to retrieve the codes?

http://www.neilkline.com/Tech%20Tips/obdcodes.htm

Cliff Harris

The transmission will only be in 4th gear if you have the shifter in the OD position.