okay so i have a 1995 civic hatch with a gsr b18c1 and the matching factory trans and it is chipped and tuned with launch controll, im sitting a dead stopp and i rev it up to 4500 where my launch controll is set and put it in 1st and launch and rev to 7500 or 7600 rpms and shift to 2nd and still getting on it revving up to the same and shift into 3rd and it kinda bogged out and my speedo stopped working and it was still in gear but it would just rev and not move the car, and i coasted for a little bit and then my speedo started working again and it runs just fine in all gears, just when i get on it is when it does it, it didnt use to do this, so i need to know if its my tune or trans or what it could be

 

Clutch

 

if it where the clutch, how come it would rev up in gear and the speed stopped working

 

its definatly not inside the transmission. if a gear inside the trans is broken that gear wouldnt work at all.

 

Your clutch is shot.....It acts up when it gets hot, then works again when it cools down, clutch needs replaced period.

 

but why would that cause my speedo to drop to zero instantly?

 

that probly a wiring issue. my car done that at the track sometimes. it was the plugs on the speed sensor. but if you are in gear and not moving its the clutch

 

did you replace the whole plug or?

 

no i cleaned it and pushed the wires back in it.