Hi,

I know, that gearbox issue is well known and worked out in detail. But I'm new to the forum - so forgive me, please;-).

My new baby just arrived to me (Poland) from the States, as non-runner. That refers to transmission problems. I learnt, that 5HP24 suffers typical FWD drum problems. I'm not sure, if my new cars is also suffering that issue. According to informations I found - with such failure the car should run in 4th gear in limp mode. My car doesn't move at all. I tried with all gears, but still nothing...... Just a small rpms drop when selecting a gear and thats all..... And after several attempts "gearbox failure" on dash.
What should I start with? Any suggestions?

Arek

 

Welcome to the forum Arek. It would appear that you have a major problem. First, do the red lights next to each gear position come on when you move the shift lever? If they do, it's possible the shift cable is broken. Also possible is not enough fluid in the transmission or the valve body is badly damaged.
This problem is really way beyond my experience, but those are just a few of the possibilities and others will hopefully be of more help.

 

Hi.


Welcome to the forum.


Try to be systematic in your hunt for the failure reason.


- Check all relevant fuses and relays.
- Disconnect and reconnect all relevant electrical connections.
- Check transmission fluid level.
- Dump transmission pan and check for metal debris.
- Always disconnect battery when working on electrics.
- Be sure your battery is fully charged.


You will need JTIS (Jaguar Technical Information Service) and JEPC (Jaguar Electronic Parts Catalog.) Both are downloadable from this forum.
Check JagRepair.com. Lots of good information from one of the forum members.
To read failure codes you will need a code reader. A generic one will read some codes, but to get transmission codes you will need Jaguar software (WDS/IDS)


Good luck

 

First see if you can read the OBDII codes and post them (not what they mean) and we can see what is going on. It would be a good idea for you to get an OBDII code reader if you plan to keep the car. It is possible that the shifter cable is broken but it could be many other things. Post the codes if you can get them.

 

hi all,
thanks for quick response. What OBDII reader you recommend to work with early XK8?
I have to get one, obviously.

Thanks

Arek

 

Here is a list of them that have been tried by members:

https://www.jaguarforums.com/forum/g...-%2A%2A-33347/

 

I have a pocket $30.00 one and Torque for my smart phone and tablet but with that you need a Bluetooth device to plug in and the price on them will range. My pocket OBDII reader will read most all “P” codes and a few others but remember that Jaguar has several proprietary codes they will not read.

 

Hello again,

took a while to get OBDII reader......:-)
Now I know the following:
- engine runs
- when selecting any gear - red light follows the lever, but no reaction/movement of the car
- after some time/attempts fault indication shows up
- red light disappears
- error code P0706

That's it......

Now rely on your best advices:-). Thank you in advance

Arek

 

Use this link and go to page 4

Link http://www.jagrepair.com/images/Auto...%201997-99.pdf

At times a shifter cable adjustment will fix the problem.

This link is for the TSB on how to do it

Link http://www.jagrepair.com/images/TSB/307-01-1.pdf

 

I made the adjustment following the procedure. Thanks for the useful links:-)

Unfortunately - no improvement.... Just found one (N) microswitch damaged inside the selector asembly. But as I can imagine this is only to allow engine start when on neutral.

What else to be done? Should I strip the gearbox already?

 

Arek, did you replace the Rotary Switch? That was done on my car before I bought it and that was to fix a similar problem of "no movement".

 

will the red indication light follow the lever, if the rotary switch is broken?
when I disconnected the cable from the selector assembly and then pulled/pushed the cable with pliers, red indication letter was moving according to the cable movement

 

When you move the shifter it moves a dial on the shifter giving you the light change it then moves the shifter linkage on the left of the transmission that movement operates the linkage in the transmission that internal movement to the transmission operates the shifter selector switch on the right side of the trans. The signal from the selector switch and the signal from the dial at the shifter tell the transmission control module and the engine control module what to do. Remember this is not your dads Buick the transmission in this car is controlled electrically. All must be adjusted and functioning correctly electrically for it to know what to do. My car had a bad selector switch and the cable was out of adjustment.

 

In fact rotary switch on the right side of the transmission causes the light to change. Checked by experience.
Shifter seems to be only to operates the cable and to allow start the engine when in park or neutral. Correct me if I'm wrong , please.
Never the less I ordered the shifter to replace it.
Will come back with result.
Thank you.

 

My problem was that the car was in drive (“D” was lit) and it would not up-shift to second gear. What I did was put the shifter in manual mode and it shifted properly. In my situation my lights were correct it was the cable adjustment that needed to be done so that both the lights at the shifter were in sync with shifter selector switch on the right of the trans. I did the same as you and purchased a new indicator panel and it was not the problem. When you get it do not open the bag and they may take it back if you do not need it.

 

Photos
1547 – 2 switches for “P” & “N”
1534 – Manual shift switch
1534 – Plugs associated with the lamination panel
1559 – Selector switch
1569 – shifter cable out of adjustment

 

I'm back with some fresh info.
Yesterday I dropped the transmission and started stripping it.
I have found, what is wrong:-)
There is oil pump seized and driving elements have fallen apart.

See the pictures.

I already ordered new pump and plate from ZF. Cost of parts in total (including gaskets and shaft seals) 250 USD.

Will get it tomorrow:-). Later I'm going to let you know, if it works with new pump installed.

Regards

Arek

 

Hi all,

finaly today my Jag moved for the very first time in Europe:-))))
Faulty oil pump was the case.
Now it works.

Thank you for all advices.

Thread is closed:-)