OK back to my Manual Transmission (MT) complain: I am using a 1.8 MT and for the past 2 months I have been complaining that there is a crunch sound when I down shift from 5th to 4th gear:
On my 30,000 service and my 40,000 service, I made the complain: However due to time constraints on my behalf, Proton Technicians could not ascertain this problem.
Due to the advice of others on the forum:
Today, I have changed my gearbox oil to Torco 75 - 140 : RM60 per liter. I used approximately 2.5 Liters. I chose Torco as I wanted a gearbox oil having a higher viscosity or in simple lay man terms (Thicker).
However, I am still having some crunching sound when I down shift from 5th to 4th gear. It is slightly better.
Now, I will definitely monitor this and I should know that it would take some time for the new gearbox oil to work on the gears.
Lets see whether in a couple of days the gearbox crunching will get better.
I have check this issue with some 1.8 MT owners: Some say that they also experience this and it is the same gear ie down shifting from 5th to 4th.
I am just wondering, how many other owners are facing this and we should collectively write to Proton to explain to them the problem.
Again, I would repeat that in the past Proton has always honored their warranty claims, I have even claim my front wind screen and brake disc rotors plus calipers and pads.
But in this instance due to my impatience plus just the number of cars now going to the Proton Excelency Service Centre located at USJ: Proton has never attended to my complain.
So should the problem persist: I will definitely bring this up to Proton.
However, if you have a 1.8 MT, please try to down shift from 5th to 4th gear at about 100KMH. When I down shift from 5th to 4th, I always blip the accelerator so that my engine revs matches the lower 4th gear. ( No I am not a bull)
Try this and if you encounter the same problem: Lets all write to Proton on this matter.