lag when shifting gears.. what could it be?

**cihanvtec** · 13-09-2010 01:59 AM

when i shift from 2nd to 3rd at high revs (mainly 2nd to 3rd), i get a massive lag before the car actually picks up in 3rd gear. it feels as if the gear is too high for the speed im traveling at.
i literally watch the revs drop slowly to 5500 rpm while i have my foot down in 3rd gear. the car then engages.

what could be causing this? why clutch? gearbox?
i also realised lately that my clutch point is really high(sensitive). as soon as i tap the clutch while driving the car revs out. could this have something to do with it?

any help is much appreciated guys. thanks in advance

**d15z1SUX** · 13-09-2010 02:14 AM

clutch slip?

**cihanvtec** · 13-09-2010 02:17 AM

is that what it is? loll sorry im noob as

**Zilli** · 13-09-2010 08:27 AM

the drop in rpm from one gear to another is driven by your gearbox spec. The gearing is long, which means you see a drop from the high revs that you were in second, to 3rd and when the clutch grabs it will continue from that rev point.

Now, if you clutch is slipping, you wouldnt see a drop in the revs when you shift, rather, when you shift from 2nd to 3rd engaged the clutch and hit the gas, the revs would shoot up...

**cihanvtec** · 13-09-2010 02:37 PM

yeahh that makes sense.. i think its like that.. its hard to explain. but yeahh it feels as if the revs shoot up, and when the clutch grabs, it drags the revs back down to where 3rd gear would originally engage. i hope its just my clutch and nothing more

**V73C** · 13-09-2010 04:12 PM

Maybe the timing is just too retarded ? maybe advance it a lil bit.

**Troy** · 14-09-2010 12:19 AM

I was having some funny clutch issues recently, pedal feel changed a bit quite suddenly and so my dad inspected and replaced clutch master cylinder for me. Then we bled the line and topped up with oil but it wouldn't release (clutch stuck to the floor) so drove it down to a brake/clutch shop where they pressure bled the line (forced the air out) for us (didn't have the equipment for it).

Now with new clutch master cylinder and fluid done properly it's like a whole new car, it has drastically changed the feel of the clutch and therefore the driving experience. Ever since I have had the car it has been a very heavy clutch, now it is noticeably lighter and responsiveness is perfect. All up was just over $100 in parts and getting shop to force bleed the air out of the line. Cheap but sweet, so worth it.

**aznstyler** · 14-09-2010 07:55 PM

Originally Posted by Troy

I was having some funny clutch issues recently, pedal feel changed a bit quite suddenly and so my dad inspected and replaced clutch master cylinder for me. Then we bled the line and topped up with oil but it wouldn't release (clutch stuck to the floor) so drove it down to a brake/clutch shop where they pressure bled the line (forced the air out) for us (didn't have the equipment for it).

Now with new clutch master cylinder and fluid done properly it's like a whole new car, it has drastically changed the feel of the clutch and therefore the driving experience. Ever since I have had the car it has been a very heavy clutch, now it is noticeably lighter and responsiveness is perfect. All up was just over $100 in parts and getting shop to force bleed the air out of the line. Cheap but sweet, so worth it.

what do you mean the clutch is stuck on the floor?

**ks_87** · 14-09-2010 08:03 PM

when my clutch was slipping, if i step on gas, revs shoot up to a higher point then hang there until wheels "catch up"
try cruising low revs in first or 2nd gear then suddenly step on gas. if revs shoot up quicker than car should be accelerating, ur clutch is probably gone

**Troy** · 15-09-2010 11:17 PM

Originally Posted by aznstyler

what do you mean the clutch is stuck on the floor?

Well exactly that, there is completely no feel at all, you just tap it with your toe and the spring goes "snap" against the wall. Once we bled the line (properly) it was fine again. This was due to losing a bit of clutch fluid when we were replacing the master cylinder (hence a bit of air was in the line). That's why you need the right amount of fluid in the line, to give you the pressure on the pedal.

**aznstyler** · 16-09-2010 04:35 AM

err.. thought you just lift the pedal up with your hand and then keep pumping

**Zilli** · 16-09-2010 07:49 AM

Originally Posted by ks_87

when my clutch was slipping, if i step on gas, revs shoot up to a higher point then hang there until wheels "catch up"
try cruising low revs in first or 2nd gear then suddenly step on gas. if revs shoot up quicker than car should be accelerating, ur clutch is probably gone

thats definitely one way of doing it. Another is to put it in 5th, pull the handbrake up and give the clutch a short and sharp "jab". If the car doesnt stall then your clutch is on its way out.