G'day,

Posted this question a while ago before I properly introduced myself in the introduction section of the forums - apologies!

I have a 1996 Jaguar XJ6 with the 3.2L - that would mean it has the 4HP22 transmission.
200,000ks approx.

The transmission will flare from 1st-2nd gear in these situations:
1. When cold, going up a slight incline, almost guaranteed to slip if at least 25% throttle is applied.
2. When going around a corner, and putting your foot down as your turning, at least 60% throttle.

She's had a trans service, so it's not the fluid or fluid level.

I never really gave her the beans totally, but she can slip if a lot of power is applied.
If warmed up and driving in a civilised manner, she won't flare at all.

I'm guessing this is a clutch pack issue - anyone have any ideas?

I'm considering having the transmission rebuilt, which I think will run me around the 4 - 5k mark.
Before that, I was going to do another trans fluid flush and give that Lucas Stop Slip magical oil a go, just to see if I have any luck with it.

Interested to hear other peoples opinions on what it could be, and what you would do if this was happening to you.

 

In your quest to give her the beans again the are shift solenoids and the transmission connector you can look at before putting money into a transmission fluid change

For you ZF4HP 22 version see page X

jagrepair.com/images/AutoRepairPhotos/jagxj1996.pdf

 

This file below page 103 for shift solenoid package

it takes a while to load

4HP22-4HP22.pdf - Google Drive

 

Technical issues and repair guidelines on this page

4HP22 Transmission parts, repair guidelines, problems, manuals (go4trans.com)

 

See bottom of page 1 for solenoid kit E7 and E9

pdfc-4hp24-22.pdf (zf.com)

 

See part # E421 as the shift solenoids and you might change all 4while you are there

Parker Hannifin is a good company so this would be a good part #

They would manufacture some of the hydrauiic components on our aircraft

ZF4HP22 _24.pdf (parker.com)

 

ZF4HP22 used on P38 Range Rover

 

See page 24 and on

zf book (bmwe34.net)

 

4hp22h has no solenoids

 

And no transmission ECU as well as a transmission connector

They get that mixed up between the 22 and 24 on the internet part source websites as well

And I am assuming there is some kind of fluid logic to eventually through a valve ( s ) to provide muscle fluid pressure to acuate the A , B , C drums to engage

That would require a definite open / close porting of the muscle pressure

This would be in the form of a hydro shutoff valve ( s )

Which you may be able to un gummy up like the ports and spring valves in the fluid logic module behind to Trans oil pan

We used a variable speed transmission between the jet engines and GENERATOR to supply a GENERATOR rotation speed for 400 HZ AC aircraft power