Hard-Drive
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About ready to top myself and torch my Landy after tonight's bit of "preventative maintenance". I'm after some help or advice!
My Landy is new to me, I've had it about a month. It's a 1986 110SW, that was originally a 2.5 N/A but has been converted to a 200Tdi. It's running a 1.22 Disco transfer box on an LT77 gearbox. I have no idea when it was last serviced so I thought I'd better get on and change all the fluids. I did the engine oil and went to change the gearbox oil. There was nothing wrong with how it drove, however after having had a Disco with an R380 box that always responded very well to an oil change, I was hoping for a good result with the 110 as it was not the nicest gearbox to use.
I drained the oil (both drains) and removed and cleaned the filter. There was a fair bit of debris on the gearbox plug magnet, but only fine "filings", no big chunks or swarf. The filter was fairly clean, although there was a bit of mayonnaise style gunge in the bottom of the plug.
I then replaced the plugs, refilled with ATF to the overflow point (using a brand new garden sprayer bought specially for the task) and put the plug back in.
There's now no doubt that the box changes more smoothly and goes into gear easier, but...and it's a big but, it now makes a horrible noise if you give it some welly. Symptoms are as follows:
High range, 1st or 2nd gear, gentle acceleration...no issue.
High range, 1st or 2nd gear, hard acceleration...horrible noise. Somewhere between the whine of a dentist's drill and someone running their fingers across the teeth of plastic comb. Seems to increase in speed faster than crankshaft revs increase. Almost sounds like one of those straight-cut rally car gearboxes...in a bad state of repair. Comes in when the turbo really spools up and it gets going. Sounds horrible.
High range, 3rd/4th/5th gear, no noise, regardless of how much welly is being given
Low range, all gears, hard accleration, horrible noise. Gentle acceleration, no noise.
There's no slipping or lost drive, no banging or juddering. It's not dependant on road speed or revs. It seems entirely dependant on how much welly you are giving it and how smooth you are. The best comparison is like driving on snow. Go gently in whatever gear you like at whatever speed and it's fine. Hoof it in a low gear and you're going to wheelspin, or get that horrible noise.
I'm absolutely gutted. I've done loads of tinkering on my truck, just got it straight through an MOT with no advisories, so I've started treating it to accessories and pointless shiny bits and I get this in return.
How the hell can brand new fluid make a previously unknown problem suddenly manifest itself in such a horrible sounding way, yet at the same time hugely improve the gearchange? The fluid that I drained was a bit black, but not overly thick/runny and had no visible water contamination or similar.
Any advice gratefully recieved...thoroughly p1ssed off right now.
Thanks...
My Landy is new to me, I've had it about a month. It's a 1986 110SW, that was originally a 2.5 N/A but has been converted to a 200Tdi. It's running a 1.22 Disco transfer box on an LT77 gearbox. I have no idea when it was last serviced so I thought I'd better get on and change all the fluids. I did the engine oil and went to change the gearbox oil. There was nothing wrong with how it drove, however after having had a Disco with an R380 box that always responded very well to an oil change, I was hoping for a good result with the 110 as it was not the nicest gearbox to use.
I drained the oil (both drains) and removed and cleaned the filter. There was a fair bit of debris on the gearbox plug magnet, but only fine "filings", no big chunks or swarf. The filter was fairly clean, although there was a bit of mayonnaise style gunge in the bottom of the plug.
I then replaced the plugs, refilled with ATF to the overflow point (using a brand new garden sprayer bought specially for the task) and put the plug back in.
There's now no doubt that the box changes more smoothly and goes into gear easier, but...and it's a big but, it now makes a horrible noise if you give it some welly. Symptoms are as follows:
High range, 1st or 2nd gear, gentle acceleration...no issue.
High range, 1st or 2nd gear, hard acceleration...horrible noise. Somewhere between the whine of a dentist's drill and someone running their fingers across the teeth of plastic comb. Seems to increase in speed faster than crankshaft revs increase. Almost sounds like one of those straight-cut rally car gearboxes...in a bad state of repair. Comes in when the turbo really spools up and it gets going. Sounds horrible.
High range, 3rd/4th/5th gear, no noise, regardless of how much welly is being given
Low range, all gears, hard accleration, horrible noise. Gentle acceleration, no noise.
There's no slipping or lost drive, no banging or juddering. It's not dependant on road speed or revs. It seems entirely dependant on how much welly you are giving it and how smooth you are. The best comparison is like driving on snow. Go gently in whatever gear you like at whatever speed and it's fine. Hoof it in a low gear and you're going to wheelspin, or get that horrible noise.
I'm absolutely gutted. I've done loads of tinkering on my truck, just got it straight through an MOT with no advisories, so I've started treating it to accessories and pointless shiny bits and I get this in return.
How the hell can brand new fluid make a previously unknown problem suddenly manifest itself in such a horrible sounding way, yet at the same time hugely improve the gearchange? The fluid that I drained was a bit black, but not overly thick/runny and had no visible water contamination or similar.
Any advice gratefully recieved...thoroughly p1ssed off right now.
Thanks...
. Good luck anyway.
