Limited Slip Differential (Winter project)
Posted: Wed Nov 18, 2009 8:54 pm
Twiddling your thumbs?
Need a winter project?
How about fitting a LSD in your Salisbury 4HA axle?
In my opinion a limited slip differential should have been fitted at the factory to every new Tiger as standard. Obviously cost considerations ruled out this important safety item.
There are basically three different types of LSD:
1)clutch plate (Thornton Powr-Lok)
2)geared or torque-biasing (Quaife, Torson-Gleason)
3)viscous.
I advise using the Quaife ATB Helical gear type, not the clutch type (Powr-Lok) which is generally fitted to the Tiger.
The Quaife LSD is far smoother in engagement than the Powr-Lok, which tends to snatch. This snatching can further aggravate an already potentially hazardous situation.
For further information on the Quaife LSD visit:
www.quaife.co.uk
Revised link for QDF1W lsd:
http://www.quaife.co.uk/shop/search/res ... C214%2C215
Quaife Engineering: Telephone 01732 741144
You will need a specialist company to install the Quaife LSD and I can recommend Competition Transmission Services (The Gearbox Man) who has a “supply and fit” service:
http://www.gearboxman.co.uk/
Telephone: 01582 840008 (Speak to Bernie, the owner)
The axle should be supplied bare without the half-shafts. Additional labour costs will be charged to remove the hubs and half-shafts.
Current pricing (excluding vat) on the LSD is £775. The fitting charge is £180 plus the price of replacement parts as required. A new pinion bearing and oil seal will be routinely fitted along with any other bearings, spacers etc.
I would estimate the total cost to be about £1200 (including vat).
Note that the Quaife LSD uses standard EP90 oil such as Comma's EP90W GL-5:
http://www.commaoil.com/productsguide/view/6/186
In contrast, the Powr-Lok requires special oil, such as Morris Lubricants' XEP90, which contains a friction modifier.
http://www.morrislubricantsonline.co.uk ... product=35
Whilst the axle is off the car it may be a good idea to replace the propshaft universal joints if you are unsure about their condition.
To make the difficult job of rear hub removal somewhat easier, I suggest you have a special puller made as per this article by Dan Walters:
http://www.tigersunited.com/techtips/Wa ... uller1.asp
Before using the puller, make sure that the hub nut is reversed on the shaft (castellations facing inwards) and is flush with end of the shaft. A sturdy piece of wood may be placed between the nut and the underside of the top half of the puller. This, hopefully, will lessen the chances of doing serious damage to the thread on the shaft.
Need a winter project?
How about fitting a LSD in your Salisbury 4HA axle?
In my opinion a limited slip differential should have been fitted at the factory to every new Tiger as standard. Obviously cost considerations ruled out this important safety item.
There are basically three different types of LSD:
1)clutch plate (Thornton Powr-Lok)
2)geared or torque-biasing (Quaife, Torson-Gleason)
3)viscous.
I advise using the Quaife ATB Helical gear type, not the clutch type (Powr-Lok) which is generally fitted to the Tiger.
The Quaife LSD is far smoother in engagement than the Powr-Lok, which tends to snatch. This snatching can further aggravate an already potentially hazardous situation.
For further information on the Quaife LSD visit:
www.quaife.co.uk
Revised link for QDF1W lsd:
http://www.quaife.co.uk/shop/search/res ... C214%2C215
Quaife Engineering: Telephone 01732 741144
You will need a specialist company to install the Quaife LSD and I can recommend Competition Transmission Services (The Gearbox Man) who has a “supply and fit” service:
http://www.gearboxman.co.uk/
Telephone: 01582 840008 (Speak to Bernie, the owner)
The axle should be supplied bare without the half-shafts. Additional labour costs will be charged to remove the hubs and half-shafts.
Current pricing (excluding vat) on the LSD is £775. The fitting charge is £180 plus the price of replacement parts as required. A new pinion bearing and oil seal will be routinely fitted along with any other bearings, spacers etc.
I would estimate the total cost to be about £1200 (including vat).
Note that the Quaife LSD uses standard EP90 oil such as Comma's EP90W GL-5:
http://www.commaoil.com/productsguide/view/6/186
In contrast, the Powr-Lok requires special oil, such as Morris Lubricants' XEP90, which contains a friction modifier.
http://www.morrislubricantsonline.co.uk ... product=35
Whilst the axle is off the car it may be a good idea to replace the propshaft universal joints if you are unsure about their condition.
To make the difficult job of rear hub removal somewhat easier, I suggest you have a special puller made as per this article by Dan Walters:
http://www.tigersunited.com/techtips/Wa ... uller1.asp
Before using the puller, make sure that the hub nut is reversed on the shaft (castellations facing inwards) and is flush with end of the shaft. A sturdy piece of wood may be placed between the nut and the underside of the top half of the puller. This, hopefully, will lessen the chances of doing serious damage to the thread on the shaft.
. Usually if you don't have a LSD, you will lose traction on just one wheel and thats about all that hapens. With a LSD if you lose traction you will spin both rear wheels. Thats when the rear tries to overtake the front.