• Hi Guest! Being a Paying Supporter is NOT a requirement to participate at BCF. However, subscribing will help ensure we can continue to serve the LBC community for years to come. If you enjoy BCF and find our forum a useful resource...Please consider supporting us by **Upgrading**
    (PS: Subscribers don't see this banner)

Clutch-Type Differential


Jedi Hopeful
I've recently fitted a clutch type lsd (limited slip differential) in my 100/6. Unless I'm fully on the power entering corners I experience what feels like a rear steering effect as if the panhard rod or axle is loose usually towards the apex as I apply power, and it's very disconcerting. I think the diff may be too tight and locking up later than my style needs. Any thoughts?


Darth Vader
Hi Haasad,

A while back I taked to a racer that installed a very expensive Quaife Helical LSD for the reason you mensioned, Locking up on turns. He indicated that the unit he installed is not clutch/plate based but gear based and will not lock. I am sorry but I have no real knowledge or experience with either unit and was very surprised when he told me what he had installed or that an LSD was even available for the Healey.

One question to you. Will the rear accept non-Healey gear sets from other manufacturers with different rations?

Sorry I can't offer any help,
Last edited:

Michael Oritt

Country flag


1. What brand LSD did you install and is it adjustable, and if the latter do you know the present settings?
2. Is the driving you are describing taking place on the streets or at a track and if the latter can you estimate your car's slip angle through the turn?
3. What kind of tires do you have fitted?

I can't be sure from what you said in your post but it sounds like your LSD is locking up abruptly and if it is adjustable as are Quaife and Tran-X you can change the ramp settings though this will require your removing the diff.

I have LSD's in all my race cars and when properly set up their engagement/disengagement happens without changing the car's attitude, etc. and you should be able to drift/slide through a turn without the diff locking up suddenly.

With respect, I would not install an LSD in a street Healey. Aside from being what I would consider an unnecessary expense and complication I rarely experience wheel spin that I cannot control with throttle modulation--usually the result of too much speed and/or a poor line through a turn.


Jedi Hopeful
Hi. It's a hill climb and fast road car. It''s a tranx plate type and is as you describe locking suddenly upsetting the cars attitude.
Hard to estimate slip angle . I'm running vredstein sprint classics (radials).

I'm going to pull out the axle at the end of the season and have the difference ramp angles and plate configuration looked at by a pro.

Having the lsd is in my view neccesary not to waste power with wheelspin on an unloaded or tyre with less traction . I agree it's pointless on a pure street car.



Luke Skywalker
Country flag
I only run Quaife Helical LSD in my vintage racer, I have 3 diffs all set-up with differnt ratios for specific tracks. The clutch type LSD, although more economical, take a lot of testing and adjustments to get them right. The Quaife is a bolt-on and go and never need to adjust or rebuilt.

REM Polished 4.3-1 Gears.jpg


Jedi Hopeful
True but the transx is a good diff despite needing set up. If I get an unexpected windfall maybe I'll change it. But for now I'll work with what I have. Annoying that in my 911 R replica one of these works perfectly first time albeit a bit noisy in operation which I don't mind.
Similar threads
Thread starter Title Forum Replies Date
T TR2/3/3A Question on A type overdrive spec for "clutch movement from direct to overdrive" Triumph 7
Q Series 1 E Type Clutch Jaguar 2
Got_All_4 TR2/3/3A What clutch plate do I use with a J or A type Triumph 1
B Ball Bearing-type Clutch Release Bearing for BN2 - Availability ??? Austin Healey 2
T A type OD clutch lining thickness Triumph 3
D SI E Type clutch master cylinder Jaguar 3
G 79 Midget Clutch issues Spridgets 3
S TR2/3/3A Clutch not releasing Triumph 10
K Missing spring clutch release lever Other British Classifieds 0
C TR2/3/3A TR3A clutch/brake cylinder rebuild Triumph 4
T Clutch or Overdrive Slip Austin Healey 8
mt10flyer TR2/3/3A Clutch cratered - precautionary tale Triumph 0
BobHaskell For Sale: Clutch Slave Cylinder Bleeder Extension Austin Healey Classifieds 8
T TR2/3/3A Clutch Pushrod hole location Triumph 4
Jeepster Clutch Pedal Position Austin Healey 4
Basil Electronic Clutch Other British Cars 8
BarryO TR2/3/3A setting up a TR3 clutch slave Triumph 5
M master cylinder brake/clutch Tr3 Triumph Classifieds 6
Healey Nut Clutch problem Austin Healey 5
B TR6 TR6 1976 Clutch Choice Question Triumph 3
R TR2/3/3A Tr-2 Clutch Problem Triumph 46
M TR6 clutch adjustment Triumph 4
fpstude TR4/4A Brake / Clutch Fluid for TR-4A Triumph 8
C BN1 Clutch Pedal Rattle Austin Healey 2
P TR6 Clutch problem not solved Triumph 6
J For Sale Triumph TR 2/3 original brake/clutch master cylinder Triumph Classifieds 2
R Clutch Hydraulics Spridgets 4
Michael Oritt Clutch Disengagement Austin Healey 15
P TR6 Clutch hydraulics Triumph 6
RJS TR4/4A Variable Clutch Engagement Triumph 1
B Flushing brake/clutch Austin Healey 16
G TR6 Binding Clutch Pedal Triumph 5
P TR6 New front shocks & air in clutch Triumph 15
J Clutch and Grinding Gear Austin Healey 12
M TR6 Clutch Hose, SS Vendors Triumph 2
M TR6 Clutch Master Rebuild: That Crazy Wavy Washer Triumph 1
D TR2/3/3A clutch/brake pedal question Triumph 4
longbridgehealey Clutch fluid Spridgets 7
3 BN2 clutch pedal and exhaust downpipe Austin Healey 14
Drone Dog Clutch Master Cylinder Leak Austin Healey 20
Jim_Stevens TR2/3/3A Clutch slave hydraulic line Triumph 1
D TR2/3/3A Clutch through out fork misaligned Triumph 17
longbridgehealey Clutch return spring Austin Healey 7
PeterK TR2/3/3A Dang! Clutch slipping in 5th Triumph 18
R TR6 Clutch issues Triumph 7
S TR2/3/3A Clutch cross shaft bushings? Triumph 5
S TR2/3/3A TR3 clutch release bearing... from Home Depot? Triumph 12
S TR2/3/3A Noise from clutch area? Triumph 20
tahoe healey DIY Extension for Clutch Bleeding Austin Healey 23
P TR6 Clutch pedal click noise Triumph 2

Similar threads