X350 Faulty Gear 4
#1
04-02-2016, 03:39 PM
X350 Faulty Gear 4
Hello All,
As previously posted, I have a "Gearbox Fault" problem with my '04 XJR, however I now have some new information which could help me pinpoint the fault, we took the car for a drive with SDD running the adaptations so that we could see all the information about gear changes. While driving we found that the shift from gear 1-2 and 2-3 was fine, however when shifting to gear 4, the car made a "thud" or "bullet shot" sound and would not enter gear 4! This leads me to believe that gear 4 has a fault, I have had the gearbox fluid refilled and the software reflashed to no avail, another thing, when driving the car before in gear 4 (by manual shifting) this caused the gearbox to produce a lot of vibrations and make a "squealing" or "whining" noise. If I select gear 3 the car will change up and down smoothly between 1,2 and 3, but it cannot enter gear 4, does anyone have any ideas as to why this might be?
As previously posted, I have a "Gearbox Fault" problem with my '04 XJR, however I now have some new information which could help me pinpoint the fault, we took the car for a drive with SDD running the adaptations so that we could see all the information about gear changes. While driving we found that the shift from gear 1-2 and 2-3 was fine, however when shifting to gear 4, the car made a "thud" or "bullet shot" sound and would not enter gear 4! This leads me to believe that gear 4 has a fault, I have had the gearbox fluid refilled and the software reflashed to no avail, another thing, when driving the car before in gear 4 (by manual shifting) this caused the gearbox to produce a lot of vibrations and make a "squealing" or "whining" noise. If I select gear 3 the car will change up and down smoothly between 1,2 and 3, but it cannot enter gear 4, does anyone have any ideas as to why this might be?
Last edited by JaguarLover101; 04-02-2016 at 03:47 PM.
#2
04-03-2016, 08:19 AM
Veteran Member
It's better if you keep all info on one thread. Any time you add something it will come up at the top of the forum, so it won't get missed.
Apropos your fault, really only an automatic gearbox shop can sort this out, but I suspect the mechatronic unit inside the gearbox. This has electric valves to switch the fluid to the various clutches. It could be that fluid is passing the wrong way due to the seal in the unit leaking; I doubt the actual gears have gone. It also could be a duff valve. Either way, it's going to cost you some money, I'm afraid. You don't mention gears 5 & 6, do these work ?
Apropos your fault, really only an automatic gearbox shop can sort this out, but I suspect the mechatronic unit inside the gearbox. This has electric valves to switch the fluid to the various clutches. It could be that fluid is passing the wrong way due to the seal in the unit leaking; I doubt the actual gears have gone. It also could be a duff valve. Either way, it's going to cost you some money, I'm afraid. You don't mention gears 5 & 6, do these work ?
#3
04-03-2016, 08:35 AM
#4
04-03-2016, 08:48 AM
Hello All,
As previously posted, I have a "Gearbox Fault" problem with my '04 XJR, however I now have some new information which could help me pinpoint the fault, we took the car for a drive with SDD running the adaptations so that we could see all the information about gear changes. While driving we found that the shift from gear 1-2 and 2-3 was fine, however when shifting to gear 4, the car made a "thud" or "bullet shot" sound and would not enter gear 4! This leads me to believe that gear 4 has a fault, I have had the gearbox fluid refilled and the software reflashed to no avail, another thing, when driving the car before in gear 4 (by manual shifting) this caused the gearbox to produce a lot of vibrations and make a "squealing" or "whining" noise. If I select gear 3 the car will change up and down smoothly between 1,2 and 3, but it cannot enter gear 4, does anyone have any ideas as to why this might be?
As previously posted, I have a "Gearbox Fault" problem with my '04 XJR, however I now have some new information which could help me pinpoint the fault, we took the car for a drive with SDD running the adaptations so that we could see all the information about gear changes. While driving we found that the shift from gear 1-2 and 2-3 was fine, however when shifting to gear 4, the car made a "thud" or "bullet shot" sound and would not enter gear 4! This leads me to believe that gear 4 has a fault, I have had the gearbox fluid refilled and the software reflashed to no avail, another thing, when driving the car before in gear 4 (by manual shifting) this caused the gearbox to produce a lot of vibrations and make a "squealing" or "whining" noise. If I select gear 3 the car will change up and down smoothly between 1,2 and 3, but it cannot enter gear 4, does anyone have any ideas as to why this might be?
Shift elements: Clutch A & Clutch E
The turbine shaft drives the ring gear of the front, single planetary gear set and the outer plate carrier of clutch "E".
Ring gear 1 drives the planetary gears, which roll round fixed sunwheel 1. This drives planetary gear spider 1 and at the same time outer plate carrier "A" and the inner plate carrier of clutch "B".
With clutch "A" engaged, sunwheel 3 in the double planetary gear set is driven; this is in mesh with the short planetary gears. The double planetary gear spider is driven via engaged clutch "E". The long planetary gears, which are in mesh with the short ones, drive (together with the double planetary gear spider) ring gear 2 in the direction of engine rotation.
Clutch A is used in 1-2-3-4 but not 5-6. Clutch E is used in 4-5-6. Solenoid MV1 is not used in 1-2-3, but used for 4-5-6.
Possible causes could be stator bushing or E clutch failure, or possibly MV1. Either case, it sounds like a replacement/rebuild may be in order.
Last edited by Box; 04-03-2016 at 10:32 AM.
#5
04-03-2016, 04:47 PM
Power flow in 4th gear
Shift elements: Clutch A & Clutch E
The turbine shaft drives the ring gear of the front, single planetary gear set and the outer plate carrier of clutch "E".
Ring gear 1 drives the planetary gears, which roll round fixed sunwheel 1. This drives planetary gear spider 1 and at the same time outer plate carrier "A" and the inner plate carrier of clutch "B".
With clutch "A" engaged, sunwheel 3 in the double planetary gear set is driven; this is in mesh with the short planetary gears. The double planetary gear spider is driven via engaged clutch "E". The long planetary gears, which are in mesh with the short ones, drive (together with the double planetary gear spider) ring gear 2 in the direction of engine rotation.
Clutch A is used in 1-2-3-4 but not 5-6. Clutch E is used in 4-5-6. Solenoid MV1 is not used in 1-2-3, but used for 4-5-6.
Possible causes could be stator bushing or E clutch failure, or possibly MV1. Either case, it sounds like a replacement/rebuild may be in order.
When I get a chance I'm going to check the fluid level again and TCM harness for fluid contamination. And I'm going to clear adaptations and reflash the TCM again via SDD as both were recommended when I ran SDD.
I did use lifeguard 6 fluid and oem pan/filter. So disappointed as the trans is flawless up to 4th gear...
#6
04-03-2016, 06:08 PM
I have the same exact issue currently... Trans was low on fluid when purchased. Wouldn't even engage into 1st gear... After fluid, pan & sleeve change and adaptations clear and TCM reflash (via WDS, I think the reflash program was identical to what was already in the TCM) trans shifts very smooth through the gears until 4th. It feels like it's trying to catch but doesn't under light acceleration (Slipping in/out gear) under heavy acceleration it bangs and sets the engine light.
When I get a chance I'm going to check the fluid level again and TCM harness for fluid contamination. And I'm going to clear adaptations and reflash the TCM again via SDD as both were recommended when I ran SDD.
I did use lifeguard 6 fluid and oem pan/filter. So disappointed as the trans is flawless up to 4th gear...
When I get a chance I'm going to check the fluid level again and TCM harness for fluid contamination. And I'm going to clear adaptations and reflash the TCM again via SDD as both were recommended when I ran SDD.
I did use lifeguard 6 fluid and oem pan/filter. So disappointed as the trans is flawless up to 4th gear...
#7
04-03-2016, 06:28 PM
I'm contemplating taking mine in as well.
Just trying to narrow down the issue as my trans guy likes to always conclude "the unit needs to be fully rebuilt"... And in this case that's not an option..
Trending Topics
#8
04-03-2016, 06:45 PM
I have the same exact issue currently... Trans was low on fluid when purchased. Wouldn't even engage into 1st gear... After fluid, pan & sleeve change and adaptations clear and TCM reflash (via WDS, I think the reflash program was identical to what was already in the TCM) trans shifts very smooth through the gears until 4th. It feels like it's trying to catch but doesn't under light acceleration (Slipping in/out gear) under heavy acceleration it bangs and sets the engine light.
When I get a chance I'm going to check the fluid level again and TCM harness for fluid contamination. And I'm going to clear adaptations and reflash the TCM again via SDD as both were recommended when I ran SDD.
I did use lifeguard 6 fluid and oem pan/filter. So disappointed as the trans is flawless up to 4th gear...
When I get a chance I'm going to check the fluid level again and TCM harness for fluid contamination. And I'm going to clear adaptations and reflash the TCM again via SDD as both were recommended when I ran SDD.
I did use lifeguard 6 fluid and oem pan/filter. So disappointed as the trans is flawless up to 4th gear...
Banner sells a complete rebuild kit (Part #95004) from Cobra Transmission including friction plates from about $300. Bushing kit is around $100. Rebuilt torque converter D85 for N/A with improved stator around $350. Labor will be what you can negotiate.
Last edited by Box; 04-03-2016 at 07:05 PM.
#9
04-03-2016, 07:10 PM
More than likely, E clutch is failed, (burnt) or the stator bushing is so scored from fluid starvation it can no longer apply E clutch. (it actually is the seal to apply E clutch) In other products using the ZF6HP26, this is generally found in those conditions. Best of luck.
Banner sells a complete rebuild kit (Part #95004) from Cobra Transmission including friction plates from about $300. Bushing kit is around $100. Rebuilt torque converter D85 for N/A with improved stator around $350. Labor will be what you can negotiate.
#10
04-06-2016, 01:13 PM
#11
04-07-2016, 02:26 PM
#12
04-13-2016, 05:24 PM
Well, bugger!
Took the car in today, found out it was 2l low on fluid, however there is also a mechanical problem inside the box that was "unrepairable", I got the expected "your gearbox needs a rebuild" and was quoted a pretty hefty fee, I am now in talks with a jagaur specialist about getting a 2nd hand box fitted
Took the car in today, found out it was 2l low on fluid, however there is also a mechanical problem inside the box that was "unrepairable", I got the expected "your gearbox needs a rebuild" and was quoted a pretty hefty fee, I am now in talks with a jagaur specialist about getting a 2nd hand box fitted
#13
04-13-2016, 07:58 PM
Well, bugger!
Took the car in today, found out it was 2l low on fluid, however there is also a mechanical problem inside the box that was "unrepairable", I got the expected "your gearbox needs a rebuild" and was quoted a pretty hefty fee, I am now in talks with a jagaur specialist about getting a 2nd hand box fitted
Took the car in today, found out it was 2l low on fluid, however there is also a mechanical problem inside the box that was "unrepairable", I got the expected "your gearbox needs a rebuild" and was quoted a pretty hefty fee, I am now in talks with a jagaur specialist about getting a 2nd hand box fitted
I only had a P0783a code.
Looks like my issue is related to the valve body... MV1/gear 4 solenoid I believe from what I recall...
Moving forward with getting another valve body installed, bridge adapter seal and the valve body seal kit for safe measure...
Fluid looks good.
And an adaption clear and reflash. TCM software is outdated as I suspected...
#14
04-18-2016, 12:21 PM
Codes were Gear load 3-4 and gear 5 incorrect ratio
As the gearbox fluid had been refilled since it was low, I decided to de a reflash again, after all nothing to lose!
Reflash finished without fault but while I was packing away I noticed something...
Fluid leaking out from near the gearbox! Makes me wonder, has it leaked out and murdered it, or could I get the leak fixed...
Only time will tell
As the gearbox fluid had been refilled since it was low, I decided to de a reflash again, after all nothing to lose!
Reflash finished without fault but while I was packing away I noticed something...
Fluid leaking out from near the gearbox! Makes me wonder, has it leaked out and murdered it, or could I get the leak fixed...
Only time will tell
#15
04-18-2016, 03:13 PM
Codes were Gear load 3-4 and gear 5 incorrect ratio
As the gearbox fluid had been refilled since it was low, I decided to de a reflash again, after all nothing to lose!
Reflash finished without fault but while I was packing away I noticed something...
Fluid leaking out from near the gearbox! Makes me wonder, has it leaked out and murdered it, or could I get the leak fixed...
Only time will tell
As the gearbox fluid had been refilled since it was low, I decided to de a reflash again, after all nothing to lose!
Reflash finished without fault but while I was packing away I noticed something...
Fluid leaking out from near the gearbox! Makes me wonder, has it leaked out and murdered it, or could I get the leak fixed...
Only time will tell
#16
04-18-2016, 03:14 PM
Codes were Gear load 3-4 and gear 5 incorrect ratio
As the gearbox fluid had been refilled since it was low, I decided to de a reflash again, after all nothing to lose!
Reflash finished without fault but while I was packing away I noticed something...
Fluid leaking out from near the gearbox! Makes me wonder, has it leaked out and murdered it, or could I get the leak fixed...
Only time will tell
As the gearbox fluid had been refilled since it was low, I decided to de a reflash again, after all nothing to lose!
Reflash finished without fault but while I was packing away I noticed something...
Fluid leaking out from near the gearbox! Makes me wonder, has it leaked out and murdered it, or could I get the leak fixed...
Only time will tell
#17
05-23-2016, 05:39 PM
Hate to revive an old thread, but I see the need to give my conclusion.
Took the car to a local jaguar specialist, not a dealer.
They first tried replacing the solenoid, but that didn't work so they replaced the whole box with a used one with 25,000 miles on it, all in £1500 and about two days work, drove it on the motorway on the way back and was as smooth as silk! Truly an amazing car!
Took the car to a local jaguar specialist, not a dealer.
They first tried replacing the solenoid, but that didn't work so they replaced the whole box with a used one with 25,000 miles on it, all in £1500 and about two days work, drove it on the motorway on the way back and was as smooth as silk! Truly an amazing car!
Thread
Thread Starter
Forum
Replies
Last Post
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)