Evo IX 5th-Gear Grind
#46
Evolved Member
iTrader: (18)
As I understand, this is the reason for 5th gear grind on some Evos: due to the large gap between 4th and 5th, the latter being very tall, the synchro wears abnormally if one tried to shift quickly. In essence, the synchro doesn't have a chance to catch up and becomes damaged over time. The solution is not to shift fast from 4th to 5th.
I only have ~50K on my IX, albeit quite a bit of it at WOT, so I'm not sure it's a real data point. Never a grind. Not once. Always OEM fluids - no exceptions. I don't shift terribly fast; just quick enough not to loose spool.
I only have ~50K on my IX, albeit quite a bit of it at WOT, so I'm not sure it's a real data point. Never a grind. Not once. Always OEM fluids - no exceptions. I don't shift terribly fast; just quick enough not to loose spool.
#48
EvoM Guru
iTrader: (1)
Originally Posted by FJF
As I understand, this is the reason for 5th gear grind on some Evos: due to the large gap between 4th and 5th, the latter being very tall, the synchro wears abnormally if one tried to shift quickly. In essence, the synchro doesn't have a chance to catch up and becomes damaged over time. The solution is not to shift fast from 4th to 5th.
I only have ~50K on my IX, albeit quite a bit of it at WOT, so I'm not sure it's a real data point. Never a grind. Not once. Always OEM fluids - no exceptions. I don't shift terribly fast; just quick enough not to loose spool.
I only have ~50K on my IX, albeit quite a bit of it at WOT, so I'm not sure it's a real data point. Never a grind. Not once. Always OEM fluids - no exceptions. I don't shift terribly fast; just quick enough not to loose spool.
#50
Evolved Member
#53
Evolved Member
If fork was vibrating you can feel it during drive and shifts or may be you were more focused on apexes and corners
#57
Evolved Member
#58
Not gear oil specifically, but I've used their other products. Too over-priced, and for my particular application, I didn't get good results.
My GSX developed rod bearing knock right after switching to that oil, after the car had ran beautifully for years. Could have been completely coincidental, but I do not like how it suddenly started after switching to it from years of using Mobil1/Ams Oil.
My GSX developed rod bearing knock right after switching to that oil, after the car had ran beautifully for years. Could have been completely coincidental, but I do not like how it suddenly started after switching to it from years of using Mobil1/Ams Oil.
#59
Evolved Member
Not gear oil specifically, but I've used their other products. Too over-priced, and for my particular application, I didn't get good results.
My GSX developed rod bearing knock right after switching to that oil, after the car had ran beautifully for years. Could have been completely coincidental, but I do not like how it suddenly started after switching to it from years of using Mobil1/Ams Oil.
My GSX developed rod bearing knock right after switching to that oil, after the car had ran beautifully for years. Could have been completely coincidental, but I do not like how it suddenly started after switching to it from years of using Mobil1/Ams Oil.
Did not find Red line here so was thinking to switch to royal purple gear oil.
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