Jono65
9th February 2017, 11:58 AM
Hi, I am new to the forum, but am on my third Patrol. Currently have a 1995 manual non-turbo Patrol.
We have an issue with something in the drivetrain making an awful clunk when going down a steep hill with a load behind. It only happens with a load adding push to the driving, like a heavy tandem trailer or horse float, not when just the Patrol itself is going down the hill.
It sounds to me a bit like the added weight is forcing a cog tooth somewhere to crunch past before it should. Once on level ground again it never reappears, but the wagon makes a strange extra noise form somewhere, a bit like a mechanical buzzing. It can be intermittent and go away but I can't make any sense of it, nor can my mechanic.
Does anyone have any experience or knowledge of this sort of problem: diff? Transfer case? Gearbox? Front hubs? or all of the above? What we want to do is see if there is a way to diagnose without pulling the entire drive train out and opening up everything.
I would be very grateful for any responses or advice.
We have an issue with something in the drivetrain making an awful clunk when going down a steep hill with a load behind. It only happens with a load adding push to the driving, like a heavy tandem trailer or horse float, not when just the Patrol itself is going down the hill.
It sounds to me a bit like the added weight is forcing a cog tooth somewhere to crunch past before it should. Once on level ground again it never reappears, but the wagon makes a strange extra noise form somewhere, a bit like a mechanical buzzing. It can be intermittent and go away but I can't make any sense of it, nor can my mechanic.
Does anyone have any experience or knowledge of this sort of problem: diff? Transfer case? Gearbox? Front hubs? or all of the above? What we want to do is see if there is a way to diagnose without pulling the entire drive train out and opening up everything.
I would be very grateful for any responses or advice.