Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: supersparks on April 27, 2011, 07:27:06 PM

Title: diff query
Post by: supersparks on April 27, 2011, 07:27:06 PM

hi all i own a 2002 WJ 4.0 6cyl how can i tell which diffs i have without opening them up. i am looking at doing an oil change and i dont know if i need 80w90 or 75w140 and if i still need a friction modifier with the 75w140 as some of the oils available already have modifiers mixed in. also the manual quotes a mopar number for the transfer oil does any body know of an aftermarket alternative. thanks, mick.

Title: Re: diff query
Post by: scrw on April 27, 2011, 07:46:10 PM

75w90, 4litres didn't get quadradrive in the UK. Get the mopar oil, it is only around £8 a litre. I did find an equivalent oil, its a mobile agricultural hydrolic mix, but you can only get it in 200 litre drums

Title: Re: diff query
Post by: Mike Pavelin on April 27, 2011, 08:45:29 PM

Unless it says 'Quadradrive' on the gearshift console, it has open diffs. We used to use Shell Agrifluid in the 247 transfer case.

Title: Re: diff query
Post by: supersparks on April 27, 2011, 09:04:11 PM

hi, it says quadra-trac 2 on the console . does this mean i have 2 slip diffs (vari lock).

Title: Re: diff query
Post by: Mike Pavelin on April 27, 2011, 09:11:23 PM

No it means you have open diffs

Title: Re: diff query
Post by: supersparks on April 27, 2011, 09:47:19 PM

well that is the diff mystery well and truly put to bed.  ps how do i tell what gbox i have fitted would it be the 42re. thanks, mick.

Title: Re: diff query
Post by: Mike Pavelin on April 28, 2011, 07:17:00 AM

Yes.