Two weeks ago I was doing some filming for the Practical Performance Car YouTube channel.
While overtaking the camera car with my Mk1 Stag (the more powerful one of the pair), I gave it plenty of welly pulling out from a crossroads where we had just turned around. The offside rear wheel started spinning as I grabbed second gear. It will hook up in a moment I thought. (dry road)
Bang,
It rapidly became obvious I had a box full of neutrals.
Rolled to a stop in the industrial estate just in front of me. Selected first and got out for a listen. Whirring noise from the diff.
I was pretty sure what had happened as I have done this twice previously with my V8 Toledo (Sprint Diff, same internals)
I had a hell of a job getting the cross pin out, until it turned out that the locating pin had sheared in the cross pin and it just needed punching out without removing the locating pin first. The bearing on the thrust side of the carrier had turned on the carrier leaving a wear ridge, so the carrier was scrap as well.
This Diff has done about 30,000 miles since I rebuilt it and it was all fine then. The cross shaft has a fair amount of galling on it. This wouldn't all have happened on this occasion , and I had noticed the diff had got increased backlash. This is normally caused by the planet gear thrust washers wearing thin.
I was actually extremely happy that this had gone bang only half a mile from home. A quick call to my cowman and he appeared with the Kubota ATV and towed me home. The following week I was due to take it round the Curborough Sprint course with the TR register. Even worse it could have gone bang in the South of France where I am going on holiday towing my trailer tent in August.
Last year at the EJ Wards open day, they were fitting a Blackline LSD to a customers car.
Never heard of them before (Chinese copy of the Quaife LSD I believe) but a bit of googling on various car forums didn't come up with anything bad.
Fortunately my Crown Wheel and Pinion had got away with only a few tiny chips to the edges of a few teeth, but not on the load bearing areas. I also inspected the bearings which were pretty good, though I did decide to replace the thrust side bearing on the crownwheel as these are often the first to go. Genuine Timken bearings are not cheap, £72 for that one alone!
The new Diff arrived last week £585 delivered
Blackline LSD.jpg
Fitting was pretty easy, just needed a few extra shims to get the preload correct, and I have a few in stock.
InstalledLSD.jpg
Tried it out tonight, attempting to re-create the moment the previous one went bang. I get an initial chirp from the unloaded tyre, then the diff chucks the power to the other side so there is a slight sideways lurch before that tyre hooks up again and I don't get the frantic spinning any more.
If anyone can break it I probably can, so we will see hoe reliable this diff actually is.
My V8 Toledo was also filmed that day, video came out a couple of days ago.
Stag video will be at some time in the future
Neil
While overtaking the camera car with my Mk1 Stag (the more powerful one of the pair), I gave it plenty of welly pulling out from a crossroads where we had just turned around. The offside rear wheel started spinning as I grabbed second gear. It will hook up in a moment I thought. (dry road)
Bang,
It rapidly became obvious I had a box full of neutrals.
Rolled to a stop in the industrial estate just in front of me. Selected first and got out for a listen. Whirring noise from the diff.
I was pretty sure what had happened as I have done this twice previously with my V8 Toledo (Sprint Diff, same internals)
I had a hell of a job getting the cross pin out, until it turned out that the locating pin had sheared in the cross pin and it just needed punching out without removing the locating pin first. The bearing on the thrust side of the carrier had turned on the carrier leaving a wear ridge, so the carrier was scrap as well.
This Diff has done about 30,000 miles since I rebuilt it and it was all fine then. The cross shaft has a fair amount of galling on it. This wouldn't all have happened on this occasion , and I had noticed the diff had got increased backlash. This is normally caused by the planet gear thrust washers wearing thin.
I was actually extremely happy that this had gone bang only half a mile from home. A quick call to my cowman and he appeared with the Kubota ATV and towed me home. The following week I was due to take it round the Curborough Sprint course with the TR register. Even worse it could have gone bang in the South of France where I am going on holiday towing my trailer tent in August.
Last year at the EJ Wards open day, they were fitting a Blackline LSD to a customers car.
Never heard of them before (Chinese copy of the Quaife LSD I believe) but a bit of googling on various car forums didn't come up with anything bad.
Fortunately my Crown Wheel and Pinion had got away with only a few tiny chips to the edges of a few teeth, but not on the load bearing areas. I also inspected the bearings which were pretty good, though I did decide to replace the thrust side bearing on the crownwheel as these are often the first to go. Genuine Timken bearings are not cheap, £72 for that one alone!
The new Diff arrived last week £585 delivered
Blackline LSD.jpg
Fitting was pretty easy, just needed a few extra shims to get the preload correct, and I have a few in stock.
InstalledLSD.jpg
Tried it out tonight, attempting to re-create the moment the previous one went bang. I get an initial chirp from the unloaded tyre, then the diff chucks the power to the other side so there is a slight sideways lurch before that tyre hooks up again and I don't get the frantic spinning any more.
If anyone can break it I probably can, so we will see hoe reliable this diff actually is.
My V8 Toledo was also filmed that day, video came out a couple of days ago.
Stag video will be at some time in the future
Neil
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