Good day everyone,

I have the infamous sluggish Auto box behavior and found out that there is a TSB solving such issues, but got a recommendation from a Jag / Range Rover specialist that updating an old & driven (93,000km) transmission can result in it's failure as he experienced numerous times of it happening on Range Rovers (ZF gearbox). Is this true? As I can't see anywhere in the bulletin that there may be danger in doing this procedure on old machines? I'm really into getting the best experience of my car and still love it for all around experience it provides me, but got a little scared after those warnings, though they were related to Range Rovers.

What do you guys say? Clutch pressure changes on worn parts with new software, etc, anything to halt me from this procedure? Has anyone done it before on a dated vehicle?

The Bulletin:

http://www.jagrepair.com/images/TSB/...0Operation.pdf


Thank you for your time in advance,

David

 

The ZF I can see...many people never change the fluid and filters in them, and they are just time bombs in that case.


The jag has a Jatco box, which is a lot more capable of being ignored. There are plenty of Japanese cars running these transmissions 250-300K miles with never so much as a fluid change!

 

That is what I'm thinking too, these both gearboxes have nothing in common...

Any other info of risks that should stop me from updating it to an awesome behaving transmission?

 

Is there any Jag tech here that can tell me if TCM update can damage the transmission if the car has about 55k miles on it? It's a good update and it will be pity not to enjoy its benefits in such a good automobile.

 

I have never had a TCM update kill a transmission UNLESS you use the wrong software package. As of a few years ago I think there was about 16 different software packages for the the X300 chassis. Just make sure the update is market and VIN matched!!!

The JATCOs do need to be serviced like any other transmission. They are as said above just ignored like a lot of Toyota and Honda's are. Only they are made specifc for Ford/Jaguar and cost a little bit more and most Asians are not AWD.

They die on fluid changes when a "automotive technician" drains the fluid through the large 13-14mm bolt that looks like a drain plug. Sorry that bolt hols the reverse band in!!!

Drain it and refill with good fluid IE full synthetic. Just like Toyota and Honda it is not recommended to power flush any JATCO unit.

TCM is update is the last step, it can help, but start with the fluid.

 

Hey Norgards Automotive, thanks for giving time and answering.

Did a fluid change from the official drain plug, changed a little bit but it still feels like a bad managed software behavior. Will do today the ECM / TCM update (VIN matched) and let you know how things turned to be.

 

Can someone please post a pic of the RIGHT drain plug vs the WRONG Reverse Band bolt ?

 

Level plug


Drain Plug

Fill Plug


THIS IS THE REVERSE BAND BOLT!!!!! DON'T TAKE OUT




Transmission Fluid Level Check

WARNING:

VERIFY PROPER PLUG IS REMOVED FOR LEVEL CHECK.

Because of the similarity to other plugs and fasteners on the transmission, the potential for loosening an incorrect fastener, instead of the level plug, exists. There is a risk for internal transmission damage if the improper fastener is removed.

• Removal of the reduction gear brake band bolt can cause total loss of drive or a substantial reduction in the performance of the transmission.
• Removal of the parking pawl rod plate retaining bolt (located next to the XYZ switch) will result in problems/gear lever movement restrictions.

1. Raise and support the vehicle.
2. Connect the approved Jaguar diagnostic system.
3. Make sure J-Gate shift selector is in the Park position (P).
4. With the engine running and the foot brake applied, move the J-Gate shift selector through "P-R-N-D-4-3-2" and back to the "P" position to circulate the automatic transmission fluid until the temperature reaches 30 to 40°C (86 to 104°F) on the approved Jaguar diagnostic system.
5. When the automatic transmission fluid temperature reaches 35°C (95°F) check that the selector lever is in the "P. position raise the vehicle.

1. With the engine running, remove the automatic transmission fluid level tube plug.

1. If the automatic transmission fluid does not come out of the transmission fluid level tube the automatic transmission fluid level is insufficient. If this is the case add the automatic transmission fluid in 0.5 litre units into the automatic transmission fluid charging pipe until the automatic transmission fluid comes out of the automatic transmission fluid level tube.

NOTE: Use automatic transmission fluid WSS-M2C922-A1 or equivalent meeting Jaguar specification.

1. Allow the automatic transmission fluid to come out of the automatic transmission fluid level tube until the overflow stops at a temperature of no more than 40°C (104°F).

NOTE: Make sure the automatic transmission fluid temperature does not exceed 40°C (104°F) . If the automatic transmission fluid temperature does exceed 40°C (104°F) stop the automatic transmission fluid level check and allow the automatic transmission fluid to cool until the temperature reaches 30 to 40°C (86 to 104°F).

1. If when the automatic transmission fluid level plug is first removed and automatic transmission fluid comes out of the automatic transmission fluid level tube, allow the automatic transmission fluid to come out of the automatic transmission fluid level tube until the overflow stops at a temperature ofno more than 40°C (104°F).

NOTE: Make sure the automatic transmission fluid temperature does not exceed 40°C (104°F). If the automatic transmission fluid temperature does exceed 40°C (104°F) stop the automatic transmission fluid level check and allow the automatic transmission fluid to cool until the temperature reaches 30 to 40°C (86 to 104°F).

1. Install the transmission fluid level plug.

1. Install the automatic transmission fluid charging pipe cap.
2. Lower the vehicle.
3. Disconnect the approved Jaguar diagnostic system.

 

BIG Thumbs up - Thanks