Hi,
Yesterday I pumped out a little over 2 qts of transmission fluid which I of coursed replaced. This is the first time I did this and was wondering how many miles I should drive before I do this again and again?
I also have the same question regarding my power steering fluid.
Thanks,
Jomo

 

It’s not a big job to drain transmission from underneath, tacking the pan off and changing the filter isn’t that bad either.
I think this still leaves some oil in system but my gear change was so much smoother after.
im no export but I did mine and it still works.

 

If the fluid in the trans is an "unknown age", I do it 8 times in about 200kms, with as many gearchanges as possible, or whenever I get the warm and fuzzy to climb under under and drop the dipstick tube, drink a beer or 2 while it drains, refit said tube, pour in 5ltrs, another beer, job done.

It does take several drop and refills to get the "new' concentration up in the 90%+ mark, and the trans will then be happy, especially that lockup convertor set up, NO MORE clunking after 3 sessions.

I am NOT a fan of these flush machine, seen too many trans shocked into failure wiuth them.

Power steer, SAME, its simple, syringe it out, refill, and move on, many times.

Fluid is CHEAP, transmissions and steer components, not so.

 

Grant, thanks for your reply. I just want to be sure that I understand what you wrote. You did 8 flushes in 200kms which is about a flush every 25 kms OR you did each flush after 200kms which is a total of about 1600kms?

 

NAH, I am STRANGE, so i am told.

At the time, work was 25ish kms round trip.Suburban roads, so PLENTY of gear changes each way.

Being OLD, I finish at 3PM, drive home, drain the trans, drink beer, refill the trans, repeat next day, IF I feel like it, if not, then the next day, until the COLOUR of what drains OUT is about the same colour as what is going IN, trans is happy.

The filter inside that 4HP trans is a metal mesh thing, like the old Borg Warner units, so, unless there is metal "bits" felt in the old fluid, leave it be.

Steer is the same.

Ironically, just got home, and syringed out and refilled the X Type steer fluid, and memory?????? that is about 10 times since September (purchase date for me), and the weirdness of that steering system is GONE. Its trans will get #9 drop and refill this weekend, they be a tad messy to drop and refill. Both fluids in that car were BLACK, and I mean BLACK, and STANK, when I did the 1st drop and refill, and at 90K kms, very sad to see.

This procedure has been my ruling for ALL my Jags, since 1968, and has served me well.

 

I do a drain and refill of my Transmission, at the same time as the oil and filter change. I got this advice from others on the forum and it seems to be working well. The first time I did it there was a noticeable improvement in gear changes and the fluid that came out was black.

 

That is just what I plan on doing once I get the fluid looking good. And I too got that advice from others on the forum.
Thanks,
Jomo

 

ZF4HP24 used in BMW E32 series



Jaguar X300 transmission service manual file below for the ZF4HP24 and ZF4HP22 non electric control version used in 3.2 liter models :

 

If you do the trans filter change is there much oil left in the system ?

 

Yes , look at the numbers in the docs

The majority is stuck in the torque converter

https://www.jaguarforums.com/forum/x...change-133117/

 

Oh, I better change it again just to be in safe side. When checking the level I understand oil should be hot but do you check with engine running and in park ? Or stop engine and check in park ?

 

In park after running through the gears , warmed , engine running

 

When I got my '96 4.0, the shifting was sloppy and the trans light came on so I pumped out all I could and replaced it. I think the most I could get out was just under a gallon.
I did that 2-3 times in a row.
Went through quite a bit of trans fluid but it's cheap and it really helped.

 

This sounds like something i need to do to my 96 X300. Im a little bit confused though, do all of you remove the pan this many times or is there a drainplug on yours?

 

You use the big dipstick tube nut

 

I have a drain plug, I use the dipstick tube to refill

 

Some have a drain plug towards the rear of teh pan.

Our XJ40 did, the X300, nope.

Undo the BIG dipstick tube nut, and then lower the car back down, carefully, with the pan under the dribbling fluid.

Wait a few minutes, raise the car, tighten that BIG nut (NOT Rock Ape tight please). Pour in the 5ltrs, and drive it, then repeat as needed, until the draining fluid is the same colour as in the ingoing fluid, jobs done.

 

Hm, unless I'm missing something, isn't siphoning the easiest way to "drain & fill" these transmissions? I've done it three times now on my jag and it was super easy. A length of vinyl tubing and a drain pan, I get about 3 quarts out each time (through the dipstick tube). No jack, no jack stands, no pan gaskets, no mess, etc. It is tricky to get it started, but once it is you just let it sit there and it drain the pan out and then you just refill it with the same amount that came out.

 

AGREED.

I have it down to a fine art, and old age makes me reluctant to change.

Anyway, with that syphon method I would drink too many beers, and never find the damn car until tomorrow. Its a 4 beer task the way I do it now.

Then these "new" things in my fleet without a dipstick, they be special beasts indeed. Got a drain plug and a fill plug, simple enough.

 

Just checked the fluid in my transmission after about a 80km drive. Its worringly 2inches over the top mark on the stick. Its also pretty brown.

it shifts pretty rough aswell.