Vehicle & Technical > Jeep
XJ 4wd system
tim_aka_tim:
--- Quote from: "CaptainColourful" ---My 98 reg ( xj ?) 4 litre is fitted with yet another variation ... Quadra-Track.
This is a full time 4 wheel drive with low and high ratios, which are changeable at 2-3 mph with the gear selector in Neutral ( similar to Disco)
Trac-Lok rear axle is basically a limited slip diff.. There is no diff lock fitted to these models as far as I know.
--- End quote ---
If your Jeep is the one in your avatar, thats a ZJ, not an XJ. Different beast.
XJ - 1984 to 2001 Cherokee
KJ - 2001 onwards Cherokee/Liberty
ZJ - 1993 to 1998 Grand Cherokee
WJ - 1999 to 2004 Grand Cherokee
Mort:
Quadra Trac was never fitted to XJs, which is a shame, 'cos it's a good system. As Tim says, yours must be a Grand Cherokee.
IIRC the Quadra Trac system uses a gerotor in the T/C, which will automatically engage a clutch to to restrict the centre differential, without user intervention, if one prop shaft turns significantly faster than the other. There is also a Quadra Drive variant which has a gerotor in the front and rear axles too which operate when there is a significant speed difference between wheels on an axle - so you would effectively have automatic axle diff lockers. Neat system.
CaptainColourful:
I stand corrected, thanks lads. Err yes it is a Grand Cherokee.
I knew there was "J" in it though :roll:
Looking through the owner's handbook, it mentions a Torque Converter Clutch, a feature designed to improve fuel economy. It engages automatically at calibrated speeds " and may result in a slightly different feeling or response during normal operation at high gear"
So you see ? The handbook is as clear as mud.
No wonder I am confused :?
Cherry Bomb:
You have to remember that the manual was written for the american market, so has useful information like making sure the vehicle is stationary before exiting and not driving so fast it falls over. :wink:
Dinkydave:
It covers them for eejuts behind the wheel. :lol:
Like the darwin award bloke who took a company to court because in the handbook of the winabago he'd bought it didn't tell him you couldn't put it in cruise & go & make a coffee.
He crashed (and won the case)
Not sure how true the story is, but it is the USA :lol:
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