Birty Dastards Jeep Club

Tech Forum => Workshop => Topic started by: Garypatt on February 13, 2011, 01:53:07 PM

Title: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Garypatt on February 13, 2011, 01:53:07 PM

Bought this car a month ago and I am now noticing a problem, when driving from cold the revs will climb as if not in gear...so when i am driving with "drive" engaged the revs often climb as if not in gear?
as the car warms up this seems to go and it drives normally, has anyone had this problem?
Thanks
Gary

Title: Re: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Pedroski on February 13, 2011, 02:43:38 PM

Is it mainly when pulling away on steep hills?

Title: Re: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Garypatt on February 13, 2011, 02:46:36 PM

not really i live on a hill and always set off down hill so i think it happens over all gradients

Gary

Title: Re: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Pedroski on February 13, 2011, 02:53:32 PM

Just wondering, because very occasionally, when I go to pull away in D it seems like the car is in neutral for a couple of second. Only happens when cold. Wondering if it could be poor cable adjustment or low transmission oil or something.

Title: Re: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Garypatt on February 13, 2011, 02:54:53 PM

I though transmission oil too, just ordered a lot and i will sort later in the week.
Any more ideas  people?
Gary

Title: Re: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Mike Pavelin on February 13, 2011, 03:24:56 PM

Check the fluid level, only use Mopar atf+4. Also make sure it has the right filter fitted. If it is a '96 but has had a later replacement transmission, the '96 filter will be too shallow to pick the oil up if the level is low.

Title: Re: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Garypatt on February 13, 2011, 03:32:06 PM

Thanks Mike, how do i tell if i have the later box?
searched T`internet for filter but can only find much later ones? any ideas?
Thanks
Gary

Title: Re: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Mike Pavelin on February 13, 2011, 08:00:24 PM

It has a deeper oil pan with ribs in a criss cross pattern pressed into the bottom. It was fitted to 1998 models and carried over to the '99 on WJ. Factory replacement parts superceded to this design. The late filter is thicker to reach the bottom of the deeper oil pan and has a hard plastic shell rather than the open teabag design.

Title: Re: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Garypatt on March 24, 2011, 03:15:56 PM

Ok so done a full (home) service now, drained trans box oil and replaced filter and used MOPAR ATF+4 at £70 +, checked levels hot and cold and now it is worse? seems to be slipping gears or something does it all the time apart form motorway driving?

Help? Please?

Title: Re: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Panic mechanic! on March 24, 2011, 03:36:33 PM

when you changed the oil did you manually select all gears on the selector and let it run in them for a min or so

Title: Re: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Garypatt on March 24, 2011, 03:57:14 PM

Uuuummmm...no, think i might just go do that now?

Gary

Title: Re: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Panic mechanic! on March 24, 2011, 04:05:36 PM

you need to do that on an auto to fill up all the galleries and valve block otherwise you can get slippage

Title: Re: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Garypatt on March 24, 2011, 04:11:08 PM

Thanks for that, just gone and done it now, re checked levels too.
I will see later if it sorted it
Thanks

Title: Re: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Garypatt on March 28, 2011, 04:20:07 PM

Thanks for your help, problem has been solved.... :jump_125:
Sadly It has to go...new job and 400 miles a week to travel   :banghead:

Title: Re: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Pedroski on March 28, 2011, 08:31:35 PM

Glad it's sorted. Economy on these is pretty good on a run....keep it!

Title: Re: 1996 Grand Cherokee 4.0 with gearbox (i think) issue
Post by: Bishops Finger on March 28, 2011, 11:50:43 PM

26..go for it