[RESOLVED] 4th and 5th gear slipping

[mccurdy]

I was driving down the freeway today, and tried passing up a car, and flored it and noticed 5th gear started slipping. I have a 2600lb clutch and aluminum flywheel, so this should NOT be happening. WTF!

It did it a few more times while on the freeway, so i decided not to mess with it and just babied it to work. Is there any reasons besides a blown clutch for it to be slipping? I heard stuff about pumping up your clutch to release the pressure, but ive never had to do this before, so I don't think this is the case.

Anyone have any insight?

 

[tbonitz301]

You may be experiencing pump up. Its when your master cylinder builds pressure. Here check this out http://www.dsmtuners.com/forums/problem-diagnosis/170178-2g-pedal-pump-up.html

 

[marcmsj]

How old is your clutch? Might be time for a new clutch disc.

 

[mccurdy]

clutch is 2 years old..and i havent been hard launching on it, so it should be fine. Transmission is 2 years old too. Rebuilt tranny

 

[tbonitz301]

Time for a clutch

 

[mccurdy]

fan-freakin-tastic

 

[talon187]

street disk? how much boost? your lucky it lasted that long. i did a 2600 with a street disk and built trans. i know when my other trubo goes on in a few days that street disk isnt going to last that long im going to go with a 4 puck

 

[twicks69]

I would readjust the clutch master cylinder and bleed the system first; it is unlikely, but you may be having a hydraulic issue, or a clutch adjustment issue.

More than likely, your clutch is toast either through a worn out disk or a pressure plate not handling the job anymore due to failure or warpage.

Time to resurface the flywheel, get a new ACT2600 pressure plate, and a South Bend Clutch Kevlar disk. Be sure to use a Mitsu T.O.B also.

Sorry, and Good Luck,

TMZ

 

[talon187]

got sny info on that clutch disk what it will hold?

 

[twicks69]

got any info on that clutch disk what it will hold?

Well, I was doing as much as 550-600TQ back in the day when I was running that setup with no problems. Great wear characteristics, clutch engagement, and excellent street clutch.

There is a number of threads on here concerning the South Bend Kevlar sprung Street Disk.

Otherwise, I have a few really old ratings on the Horsepowerfreaks website:
South Bend Clutch Disks Reviews

Link to the clutch disk:
South Bend Mitsubishi 2G Eclipse-Talon Clutch Disks

Good Luck,

TMZ

 

[FonZ454]

Slipping in higher gears will be the first sign of a clutch going. That's when the clutch will take the most load trying to accelerate , but the gearing is holding it back.

 

[talon187]

HorsepowerFreaks Bronze Mitsubishi Mitsubishi 1G Eclipse-Talon Clutch Disks

i may go with that disk can i use my 2600 act presure plate with it ?

 

[Cesar]

it depends on the thickness of the disk.

 

[twicks69]

HorsepowerFreaks Bronze Mitsubishi Mitsubishi 1G Eclipse-Talon Clutch Disks

i may go with that disk can i use my 2600 act presure plate with it ?

Yes, it is a direct replacement for any ACT disk related to our vehicles with a 20-spline 7/8" shaft diameter.

Just be careful; the 6-puck will potentially blow stuff up. That is why I reccomended the KEVLAR disk.

 

[Cesar]

i would assume the Kevlar disk would wear out the pressure plate and flywheel a little faster than an organic disk though, right?
I guess it's a small price to pay for clamping force...

 

[talon187]

so that disk i may go with may blow stuff up? o boy

 

[twicks69]

i would assume the Kevlar disk would wear out the pressure plate and flywheel a little faster than an organic disk though, right?
I guess it's a small price to pay for clamping force...

No, it is a better material, and can handle heat a heck of alot better. It is not going to wear out faster.

 

[mccurdy]

im just gonna baby it until i can save up for a new clutch.

Maybe ill check out the ACT. The centerforce dual friction seemed to work well up until now however.

Do you guys really go through clutches that fast?

 

[dSmgs-T]

when you say "slipping" what do you mean exactly. my 4th gear doesnt like to stay in gear SOMETIMES, always thought it was my tranny but now thinking its a clutch?! i have a ACT 2100 with unknown miles

 

[twicks69]

when you say "slipping" what do you mean exactly. my 4th gear doesnt like to stay in gear SOMETIMES, always thought it was my tranny but now thinking its a clutch?! i have a ACT 2100 with unknown miles

Do you mean that it pops out of 4th gear while driving? That is an entirely different problem, and it occurs due to excessive wear of the hub and slider for the 3/4 gearset. It is worn out, and you would need a transmission rebuild to fix that.

When we mean "slipping", we refer to the fact that you are in gear, and the engine is free-revving under load because the friction material or clamping force of the clutch is worn out or maxxed out that it slips or free-wheels under load. This would be a worn out clutch or failed clutch component, or an improperly adjusted hydraulic system for the clutch.

 

[dSmgs-T]

then that'd be my tranny. when my money tree is done blooming i plan on giving Shep a call for a nice transmission.

but thanks for the information on "slipping" clutches

 

[Cesar]

Do you mean that it pops out of 4th gear while driving? That is an entirely different problem, and it occurs due to excessive wear of the hub and slider for the 3/4 gearset. It is worn out, and you would need a transmission rebuild to fix that.

When we mean "slipping", we refer to the fact that you are in gear, and the engine is free-revving under load because the friction material or clamping force of the clutch is worn out or maxxed out that it slips or free-wheels under load. This would be a worn out clutch or failed clutch component, or an improperly adjusted hydraulic system for the clutch.

I don't think an improperly adjusted clutch would cause an engagement issue. It would cause a disengagement issue.

 

[twicks69]

I don't think an improperly adjusted clutch would cause an engagement issue. It would cause a disengagement issue.

What I meant is that the clutch is adjusted with the adjustment rod too far towards the firewall, causing preload on the pressure plate and resulting in less clamping force, overheating, and damage to the throwout bearing (usually squealing when over adjusted), and clutch damage. This would be an over-engagement of the clutch in the fact that it would disengage fine, but would result in clutch warpage, disk glazing, or pressure plate shattering.