Nikly Tiong JW
Probationary Member
- 5
- 0
- Feb 15, 2020
-
Kuala Lumpur,
Asia
Hi buddies!
I'm from Malaysia and I need some advice or guidance on my ride from fellow DSM members. Prior to reading the below, I wish to thank you in advance as it'll be a lengthy review and to apologize in advance if this topic may have been discussed before previously though I've attempted to source for answers in DSMTuner forum but was unsuccessful. Before we get into the challenges that I'm facing, let me share with the fellow members of DSM on the overview of my ride prior to troubleshooting the difficulties that I'm facing.
Ride's Original Specification
Challenge 1 - Cruising RPM
My ride currently reads 30km/h for every 1,000rpm at the overdrive gear (4th gear); at 120km/h, it'll rotate at 4,000RPM which seemed abnormal to my observation. Ideally, I wish to achieve 35-40km/h per 1,000rpm as I spend most of my time on the highway cruising between 120-140km/h (legal limits).
Is the rotation per minute normal? If it's abnormal, what would be the average rotation per minute according to my gearbox specifications? Regardless of the normality of the rotation per minute, is there any measures that I can take to reduce the rotation per minute at a given speed in contrast to my current situation? Tentatively, my idea is to replace the final drive in order to achieve a taller gear ratio though I'm unsure if it's feasible as my automotive knowledge is limited and insufficient for this matter. Alternatively, I'm open to options to transplant another automatic gearbox altogether from the same power plant family with provision that it fits the 4G93T power plant, is reliable to run under spirited driving circumstances, and doesn't require modifications to the gearbox mounting (Malaysia regulation prohibits modification done to engine/gearbox mounting for road legal vehicles).
Challenge 2 - Gearbox Noise
My ride has moderately pronounced gearbox noises occurring whenever the gearbox shifts under moderate frequencies of acceleration and deceleration; this doesn't occur when the engine and gearbox runs from cold start but occurs in increment of frequencies over the total duration of driving and probably gets worse during spirited driving. I'm unsure if the pronounced noise is from the gearbox or the driveshaft, but the noise is mostly accompanied with a harsh vibration across the cabin whenever it occurs; the vibration felt like a jerking motion.
As the transplant took place for my ride, the 4WD gearbox's transfer case was removed along with the rear axle in order to convert it into a FWD drivetrain (Malaysia prohibits 4WD conversion from FWD/RWD platform for road legal vehicles). Would such modification to convert the 4WD drivetrain to FWD resulted to the abnormality that I've experienced or generally induced harsher response from the gearbox? If it's abnormal, what measures would I be able to take in order to improve my driving experience with this gearbox? I had underwent an overhaul exercise for the gearbox with replacement of the clutch packs, seals, and water jacket, jointly with a flush of ATF from the gearbox and inserted replacement of Mitsubishi Diaqueen SP3 ATF hoping that it would improve my driving experience; it did not improve or reduce my driving experience and remained identical prior to such exercise taken. Tentatively, my idea is to replace the gearbox altogether with another suitable FWD automatic drivetrain (or another 4WD that may be locked to FWD) that is compatible for my ride's application though I'm unsure what automatic gearbox may be compatible for my application. Primarily, the potential automatic gearbox should not require any modifications done to the gearbox mounting and should be a somewhat direct fit onto my 4G93T; ideally, the potential automatic gearbox should be able to withstand 250hp and 350nm at the wheels reliably as I'm considering to undertake some Evo3's bolt-on upgrades to my 4G93T.
Due to the fact that I'm from Malaysia and the local tuners or mechanics have little to no experience on these automatic gearboxes, I have arrived at a potential dead end for my situation. As such, I've then been sourcing out to forums or forum members that may have potential solutions or guidance to my situation; it has brought me here. Herein I seek fellow forum members for advice or guidance on this matter, and I genuinely apologize for my written queries and overview that is lengthy and inappropriate, if it does. Ultimately, I wish to thank fellow forum members in advance for reading my post thread and attempting to assist me in this matter.
Your advice or guidance is deeply appreciated.
Regards,
Nikly
I'm from Malaysia and I need some advice or guidance on my ride from fellow DSM members. Prior to reading the below, I wish to thank you in advance as it'll be a lengthy review and to apologize in advance if this topic may have been discussed before previously though I've attempted to source for answers in DSMTuner forum but was unsuccessful. Before we get into the challenges that I'm facing, let me share with the fellow members of DSM on the overview of my ride prior to troubleshooting the difficulties that I'm facing.
Ride's Original Specification
- Mitsubishi Lancer 1.5 GLI (CB3A-1993)
- 4G91 DOHC EFI
- 4-Speed Automatic FWD/FF
- 4G93T DOHC MPI
- 4-Speed Automatic (W4A331UR6)
- 4WD gearbox locked into FWD (Malaysia regulations prohibited 4WD transplant)
- Gearbox has Solenoid A, Solenoid B, and Pressure Control Solenoid (without TCC solenoid).
- Gearbox had underwent the exercise of replacing the clutch packs with fresh Diaqueen SP3 ATF.
- Riding on Michelin Pilot Sport 4 of profile 205/50/16 with Evo3's stock suspension.
- Riding on TD04-13G and managed with e-Manage Blue piggyback setup with addition of fuel regulator.
- Dyno-ed on Dynojet platform with 175-177 horsepower / 280nm at the wheel with 14psi boost.
- Dyno-ed table reflected horsepower peaked at 5,000rpm, whereas the torque peaked at 3,100rpm.
- Internals are bone stock and had underwent the exercise of overhauling the engine once during transplant.
- Transplanted JDM 4G93T from Mitsubishi Libero Wagon (CD5W-1994) back in June 2019.
- Transplanted completely the front nose of the said engine bought into my Lancer.
- Transplanted items namely includes the engine, gearbox, wiring, dashboard, gear console, and sub-frame.
Challenge 1 - Cruising RPM
My ride currently reads 30km/h for every 1,000rpm at the overdrive gear (4th gear); at 120km/h, it'll rotate at 4,000RPM which seemed abnormal to my observation. Ideally, I wish to achieve 35-40km/h per 1,000rpm as I spend most of my time on the highway cruising between 120-140km/h (legal limits).
Is the rotation per minute normal? If it's abnormal, what would be the average rotation per minute according to my gearbox specifications? Regardless of the normality of the rotation per minute, is there any measures that I can take to reduce the rotation per minute at a given speed in contrast to my current situation? Tentatively, my idea is to replace the final drive in order to achieve a taller gear ratio though I'm unsure if it's feasible as my automotive knowledge is limited and insufficient for this matter. Alternatively, I'm open to options to transplant another automatic gearbox altogether from the same power plant family with provision that it fits the 4G93T power plant, is reliable to run under spirited driving circumstances, and doesn't require modifications to the gearbox mounting (Malaysia regulation prohibits modification done to engine/gearbox mounting for road legal vehicles).
Challenge 2 - Gearbox Noise
My ride has moderately pronounced gearbox noises occurring whenever the gearbox shifts under moderate frequencies of acceleration and deceleration; this doesn't occur when the engine and gearbox runs from cold start but occurs in increment of frequencies over the total duration of driving and probably gets worse during spirited driving. I'm unsure if the pronounced noise is from the gearbox or the driveshaft, but the noise is mostly accompanied with a harsh vibration across the cabin whenever it occurs; the vibration felt like a jerking motion.
As the transplant took place for my ride, the 4WD gearbox's transfer case was removed along with the rear axle in order to convert it into a FWD drivetrain (Malaysia prohibits 4WD conversion from FWD/RWD platform for road legal vehicles). Would such modification to convert the 4WD drivetrain to FWD resulted to the abnormality that I've experienced or generally induced harsher response from the gearbox? If it's abnormal, what measures would I be able to take in order to improve my driving experience with this gearbox? I had underwent an overhaul exercise for the gearbox with replacement of the clutch packs, seals, and water jacket, jointly with a flush of ATF from the gearbox and inserted replacement of Mitsubishi Diaqueen SP3 ATF hoping that it would improve my driving experience; it did not improve or reduce my driving experience and remained identical prior to such exercise taken. Tentatively, my idea is to replace the gearbox altogether with another suitable FWD automatic drivetrain (or another 4WD that may be locked to FWD) that is compatible for my ride's application though I'm unsure what automatic gearbox may be compatible for my application. Primarily, the potential automatic gearbox should not require any modifications done to the gearbox mounting and should be a somewhat direct fit onto my 4G93T; ideally, the potential automatic gearbox should be able to withstand 250hp and 350nm at the wheels reliably as I'm considering to undertake some Evo3's bolt-on upgrades to my 4G93T.
Due to the fact that I'm from Malaysia and the local tuners or mechanics have little to no experience on these automatic gearboxes, I have arrived at a potential dead end for my situation. As such, I've then been sourcing out to forums or forum members that may have potential solutions or guidance to my situation; it has brought me here. Herein I seek fellow forum members for advice or guidance on this matter, and I genuinely apologize for my written queries and overview that is lengthy and inappropriate, if it does. Ultimately, I wish to thank fellow forum members in advance for reading my post thread and attempting to assist me in this matter.
Your advice or guidance is deeply appreciated.
Regards,
Nikly
