[drivefar]

Hello All,

95 T100 SR5 4x4, 3.4 motor. HIGH mileage. Recently replaced the clutch and master/slave. Toyota always says MC/slave not in stock need to order. My mechanic replaced with non Toyota multiple times with eventual failure. Also, plate in cab has been replaced. Can the cause of all these failures be cheap after market parts? Seems to be failing about every six months.

Thanks.

 

[sdspeed]

Hello All,

95 T100 SR5 4x4, 3.4 motor. HIGH mileage. Recently replaced the clutch and master/slave. Toyota always says MC/slave not in stock need to order. My mechanic replaced with non Toyota multiple times with eventual failure. Also, plate in cab has been replaced. Can the cause of all these failures be cheap after market parts? Seems to be failing about every six months.

Thanks.

I had the same issue with mine. Finally felt it happening again and ordered the OEM parts instead of putting on a 3rd set from Autozone. No issues since.

 

[drivefar]

Thanks. Fingers crossed!

 

[fourwd1]

Rock Auto carries Aisin (OEM) master and slave cylinders, had to replace them on my 84 earlier this year.
Consider replacing the rubber hose at the same time.

 

[drivefar]

Well, the results are in...

Repair shop that I have gone to for the life of the vehicle post warranty installed the Toyota sourced CM and slave on Wednesday and today I found myself with no clutch stuck in a parking lot. Upon examination, I found the CM empty. Looks like it came out at the slave. Could the steel brake line be shedding something that is causing this?

 

[sdspeed]

Well, the results are in...

Repair shop that I have gone to for the life of the vehicle post warranty installed the Toyota sourced CM and slave on Wednesday and today I found myself with no clutch stuck in a parking lot. Upon examination, I found the CM empty. Looks like it came out at the slave. Could the steel brake line be shedding something that is causing this?

On metal tubing check all connections for cross-threaded or damage tubing ends(flare) and don't forget the flexible hoses as well. Since you've had this issue in the past something cross threaded multiple times ends up making it's own new set of threads that feel correct but the line doesn't seat properly and under pressure looses fluid thru the threads as well as go thru the walls of old flex lines. Cross threading will damage the slave too. Also if the old master held fluid then there's the chance that when the new slave was put in they pulled the metal tubing back and cracked one of the bends enough that under driving conditions and pressure is leaking fluid. Sounds like an installation issue to me. Sounds like you know these guys, it should be easy to locate when pressure is applied.Some place to start anyway?FWIW,Keep in mind that the master when depressed creates north of 120 psi.

 

[fourwd1]

Well, the results are in...

Repair shop that I have gone to for the life of the vehicle post warranty installed the Toyota sourced CM and slave on Wednesday and today I found myself with no clutch stuck in a parking lot. Upon examination, I found the CM empty. Looks like it came out at the slave. Could the steel brake line be shedding something that is causing this?

That's exactly what my problem was. The clutch SC is just like a wheel cylinder or caliper. It's a dead end where moisture accumulates and it rusts out or seizes up.

 

[BamZipPow]

Just out of curiousity...who did the clutch replacement? Did you have issues with the clutch master/slave before the clutch replacement? I wonder if the issues may be compounded with the incorrect installation or adjustment of the clutch system. How far do you have to press/release the pedal before the clutch disengages/engages?

 

[drivefar]

The shop that replaced my clutch also did the CM/slave repair. My CM/slave issues pre-date the clutch replacement. The most recent failure this past Saturday it turns out was the rubber brake line/hose that feeds the slave blew-out. The hose was original so it had 598K miles on it.

I am slowly beginning to believe that buying the AISIN replacement parts may be the solution. We shall see.

 

[BamZipPow]

The shop that replaced my clutch also did the CM/slave repair. My CM/slave issues pre-date the clutch replacement. The most recent failure this past Saturday it turns out was the rubber brake line/hose that feeds the slave blew-out. The hose was original so it had 598K miles on it.

I am slowly beginning to believe that buying the AISIN replacement parts may be the solution. We shall see.

It's possible that the worn rubber hose has been the cause of yer issues all this time. The inside of the hose could've been shedding bits and causing the slave to fail.

 

[Taco'09]

...Can the cause of all these failures be cheap after market parts? Seems to be failing about every six months...

Yes, yes, and yes again. A million years go I worked at a parts jobber and there was a time when most aftermarket parts could be counted on to be at least as good, if not better, than OEM. Not any more IMHO. There are many aftermarket parts that are, frankly, frightening and I typically will not touch most of them anymore, especially for critical areas such as brakes and steering. The only exception is if I can identify OEM parts that have an aftermarket marketing arm of the same parts.

For example, AISIN parts are probably going to be the same as OEM Toyota because Toy is a major owner of AISIN and controls them. So far the only difference I have seen is AISIN aftermarket parts lack the Toyota logo. Same deal with Denso. For bearings I often find OEM bearings in plain white generic boxes but inside are KOYO, NSK, etc. because Toy does not make (many) bearings but sources them but you got to look and do some homework. One exception would be the Bilstein shocks that are showing up on many new Toy 4WDs. IMO they are not as good, and even look less beefy, as the aftermarket shocks Bilstein offers as replacements.

A little research can be your friend and save you big money.