Hi everyone,
Can anyone help me diagnose an issue I'm having with what I think is the drivetrain? Or recommend a good 4x4 mechanic in the south east of Melbourne?
The car is a 99 prado snowy. I bought the car @ 255,000ks and have put about 35,000kms on it in one year. I noticed the problem shortly after buying it.
When cruising @ 85-105 km/h in O/D (2000-2300 rpm) and under slight load up a slight incline, I get a low thumping which can be heard and felt through the driver floor and slightly through the steeringwheel. I also get severe slipping/banging if reversing up a hill.
I'm pretty sure the reverse problem is a torque converter issue, it's the cruising problem I'm trying to identify.
The thumping noise goes away if I back off the throttle.
Downhill at the same speed is all smooth.
All smooth in N downhill
Slight vibration from the tail coasting down in N
Applying brakes or handbrake makes no difference.
No thumping revving in N at a standstill
No thumping during stall test (at a standstill in D on the driveway)
Any ideas of what the culprit could be? Any help would be great, I'm trying to decide whether to repair (we don't really have any reason to get rid of the prado) or trade into a newer model but no idea what's wrong so no way of estimating a repair cost.
Can anyone help me diagnose an issue I'm having with what I think is the drivetrain? Or recommend a good 4x4 mechanic in the south east of Melbourne?
The car is a 99 prado snowy. I bought the car @ 255,000ks and have put about 35,000kms on it in one year. I noticed the problem shortly after buying it.
When cruising @ 85-105 km/h in O/D (2000-2300 rpm) and under slight load up a slight incline, I get a low thumping which can be heard and felt through the driver floor and slightly through the steeringwheel. I also get severe slipping/banging if reversing up a hill.
I'm pretty sure the reverse problem is a torque converter issue, it's the cruising problem I'm trying to identify.
The thumping noise goes away if I back off the throttle.
Downhill at the same speed is all smooth.
All smooth in N downhill
Slight vibration from the tail coasting down in N
Applying brakes or handbrake makes no difference.
No thumping revving in N at a standstill
No thumping during stall test (at a standstill in D on the driveway)
Any ideas of what the culprit could be? Any help would be great, I'm trying to decide whether to repair (we don't really have any reason to get rid of the prado) or trade into a newer model but no idea what's wrong so no way of estimating a repair cost.
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