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the cueball 02-13-2020 01:26 AM

Quadra-Trac II
Morning all....

Am I correct in thinking that my WJ with the above system is rear wheel drive most of the time, then it uses hydraulic pressure to ‘switch’ it to all wheel drive?

We’ve just started to get snow here and this morning my Jeep was there just spinning it’s rear wheels not going anywhere...

I’m guessing the ‘switch’ should happen quickly and not take 5 minutes or something daft??

It was in Drive and 4WD high (most forward selection) and I have decent Yoko Geolander tyres all round.

Had to give up and drive by the stranded Jeep in my Audi... the shame! Lol

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CarlJH 02-13-2020 05:17 AM

yes thats basically whats ment to happen, in normal use the front and rear propshafts turn at the same speed, when one starts going faster it pressurizes the vari-loc in the TC and locks, it should only take no more than 1-2 wheel revolutions for it to kick in, once both ends are turning spinning at the same speed the vari-loc will release.
in 4low its physically locked.

HampshireWJ 02-13-2020 07:22 AM

Sound like something ain't right there - have a read of the The Four Wheel Drive section of this - - it should explain things. Carl is right though. Have a go in 4 low and see what happens.

Bigrigr 02-13-2020 08:00 AM

Sounds like the Progressive coupler in the TC is either shot, or the fluid is extremely low, or in need of a change. My 247 TC was way low on fluid when i brought it home, and it acted like this.

I also have the Quadra Trac II system....or used to...

More than likely you also have open diffs front and rear, it's possible you were siting there only spinning one tire!!! That is shamefull!

the cueball 02-13-2020 08:14 AM

I’ll try the 4low and see how I get on.

Thanks for the link, I’ll have a read of that too.

I’m about to carry out a diff/transfer oil change, so I may get lucky and that will solve the issue.

One wheel eh... not sure I can handle that level of shame [emoji85][emoji3525]

the cueball 02-13-2020 08:16 AM

Quadra-Trac II

CarlJH 02-13-2020 08:19 AM

you could try a bit of left foot braking to fool it into thinking its got more grip and limit the wheel spin, a bit like how modern traction control works.

HarryH3 02-13-2020 08:28 AM


Originally Posted by the cueball (Post 40873747)
I’m guessing the ‘switch’ should happen quickly and not take 5 minutes or something daft??

Yes, it should be nearly instant. While mine has QuadraDrive (with the VariLoc diffs front and rear), it uses the same 247 transfer case as yours. I can barely feel the rear tires slip at all before the front engages.

the cueball 02-13-2020 01:01 PM

I tried the 4lo on the way home and I can feel that all 4 wheels have traction.

I’ll be doing the oil change in a couple of weeks, so I guess fingers crossed that’ll fix it!

CarlJH 02-13-2020 01:18 PM

remember it needs a tractor UTTO oil like mobilefluid 424 or Synergy Harvella UTTO 10W-30, Westway on ebay also have there version too.

LuthWJ77 02-13-2020 03:20 PM

I thought the 247 needed the special mopar stuff?

CarlJH 02-13-2020 04:07 PM

LuthWJ77 that's what the Mopar stuff is, just with a big blue M label and a bigger price tag!

Spyder62 02-13-2020 04:40 PM

With Quadra trac 2 your not gonna get all wheel drive.(4 wheels spinning) Only one wheel on each differential will spin at a time.( Open differentials) it’s possible you have an optional limited slip in the rear. (Both wheels spin in the rear)For the most part 4 wheel drive is actually two wheel drive. Onewheel spins in the front and one wheel spins in the rear.

2oldjeeps 02-13-2020 07:52 PM

i bought the right juice at a jeep dealer at a good price...

HampshireWJ 02-13-2020 10:17 PM

Glad it worked in low range. Talk to Greg on the number on this link he'll supply you this - which is the fluid I have used and all is good. Greg does talk a bit!

The time now is 07:30 AM.

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