Ask Xulfiqar - An Automotive Encyclopedia

[pwuser157504886650]

bro plz read my plight as well

i will do that tnight and then share with u

[Xulfiqar]

Seems you are on right track.

Good luck.

[abdullahiqbal626]

Assalamu alikum
I am facing a issue in my civic 8th gen mt 2012 model when i release clutch in 1st gear car shudders/vibrates for a sec its perfectly fine in other gears.

I faced this issue couple months ago but it only happened once or twice and it vanished after it but today i noticed it again its not happening on regular basis but it happens 5 out of 10 times but only in first gear

[flyingfeather]

Wa salam. Get the engine mounts checked

[ali01]

It mean ur clutch & pressure plates worn out and required to b changed

[usm01]

@Xulfiqar
changed timing belt and tensioner for indus cuore with oem parts 4months ago
mechanic aligned belt using his skills or marks (not sure).
car is driving ok.
anything to be concerned about in future about proper belt alignment.

[Xulfiqar]

all toyota engines have timing marks. He must have used them.

[usm01]

does daihatsu cuore engine (indus) also have timing marks.

[Xulfiqar]

Yes

Btw

Daihatsu is owned by toyota

[haiderkhan068]

Hello! I have 2 door 1990 prado with 5L engine. The car vibrates in first and reverse gear when i release clutch. And also when i press brake in first and reverse gear. And sometimes when i shift the gear from second to 1st on steep roads the car doesnot move forward. Feels like it doesnot have enough power to move forward from that steep position. And one more issue is when i shift the gear in low speed there is kind of grinding noise but the noise goes away as the speed increases. It usually happens in 4th and 5th gear. I usually shift the gears at 24-26k rpm.

[dayrider]

When you say it doesn't move forward on steep climbs, does the engine rpms increase and the vehicle doesn't move? If so. Your clutch plate needs replacement

[haiderkhan068]

I didnot notice that but i will. What about vibrations?

[dayrider]

Have a look at your engine and gear foundations

[abdullah.yousaf1]

@Xulfiqar
I have Mira ES 2014 4wd, tried to change the rear differential and transfer case oil, as mentioned in the manual, toyota GL-5 80W90, but the oil that came out of differential was red in color and very thin viscosity just like cvt oil. I have imported the car myself with only 13000 k's on odo, now it is 50000, Haven't been to any local workshop yet. Please help.

[Xulfiqar]

It maybe really worn out 75w80 gear oil that you are seeing.

[tintin1]

This post was flagged by the community and is temporarily hidden.

[zakiuddin]

Alright so here's the update on rebuilding my 62TE solenoid pack.

[zakiuddin]

After removing 6x T25 screws, i was left with this

The 5x springs that you can see in the photo above, makes part of upper section of the pressure switches and its's grounded via the metallic plate i just removed. The screws were lightly threadlocked in green formula.

[zakiuddin]

After removing the springs, i was able to pry out the black housing revealing the solenoids at the back. 6 spaces (for the 6 screws that i removed) also came out at this stage along with the rest of the pressure switches.

Here are all 5 pressure switches disassembled. I was hoping that i'll find something wrong with either the brass contact or the diaphragms as the P083B was referring to one of these switches but i didn't find anything at all. There was no dirt, no blocking, no rupture in diaphragms. No nothing.

[zakiuddin]

For those who might be wondering how they work, here's an explanation.
The photo below shows how they are assembled. Left most switch show un-assembled view just like in last post and right most switch is completely assembled.

These switches work as clapper valves. In normal state, the springs push the brass contacts on to the diaphrams which is placed on the metallic caps with 4 holes. When pressurized, the diaphragms push the brass contacts back towards the springs and hits a metallic rings embedded in the plastic chassis as shown below in the red. PCM sees these metallic rings in the plastic body as 300ohm resistance; when the brass contacts hit the metallic rings, the PCM sees a ground via (rings)-(brass contact)-(spring)-(metallic plate on top of black housing) route. This is how these clapper valves/pressure switch works.

Note the black protrusions in the plastic housing shown in blue. They are meant to prevent springs touching the metallic rings. If they break, PCM will see a shorted pressure switch all the time.