Differential Rebuild Thread
#101
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Me too, am only looking for some optimizations (and removal of needless torque reductions at some areas), but in Sports mode I will do some more, that way you will always have a choice.
Most of the time I am driving in normal mode even. The higher you go in engine power the more optimization you can use, but that’s something you will find out once you are there yourself. Also remembering you where planning to up the rpm, you would need to tune your TCM for that.
So if you want a buzz bomb, you need to up power and change your gear ratio, as that will not happen with a TCM tune.
Most of the time I am driving in normal mode even. The higher you go in engine power the more optimization you can use, but that’s something you will find out once you are there yourself. Also remembering you where planning to up the rpm, you would need to tune your TCM for that.
So if you want a buzz bomb, you need to up power and change your gear ratio, as that will not happen with a TCM tune.
'I can find out when I'm there myself'- very nice! I have been rather busy with other projects and you do enjoy a good poke at Thunder kitten and such like. Yes, perhaps I never learned when I was involved in the powertrain development of the XK 180 or the Jaguar XKR'R or even the R types and Aston martin V8 Vantage but someone online will put me to rights yet again about screw compressors and TCM mapping and re-gearing. Thank you my friend
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#102
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'I can find out when I'm there myself'- very nice! I have been rather busy with other projects and you do enjoy a good poke at Thunder kitten and such like. Yes, perhaps I never learned when I was involved in the powertrain development of the XK 180 or the Jaguar XKR'R or even the R types and Aston martin V8 Vantage but someone online will put me to rights yet again about screw compressors and TCM mapping and re-gearing. Thank you my friend ![Icon Imnotworthy](https://www.jaguarforums.com/forum/images/smilies/icon_imnotworthy.gif)
![Icon Imnotworthy](https://www.jaguarforums.com/forum/images/smilies/icon_imnotworthy.gif)
No wasn’t meant like that at all, was just surprised that you were not thinking of a TCM tune, so that is why I said you will find out when you are there, and as not only you read these posts I thought it would be of benefit to others . So you have drawn a wrong conclusion here, except for thunderkitten of course LoL, but that has a history.
I find it unfortunate that you become so negative, but so be it.
Last edited by avos; 03-05-2012 at 09:31 AM.
#103
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No wasn’t meant like that at all, was just surprised that you were not thinking of a TCM tune, so that is why I said you will find out when you are there, and as not only you read these posts I thought it would be of benefit to others . So you have drawn a wrong conclusion here, except for thunderkitten of course LoL, but that has a history.
I find it unfortunate that you become so negative, but so be it.
I find it unfortunate that you become so negative, but so be it.
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#104
#105
#106
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Ideas are there, budget not unfortunately, so it will take some time before I decide. To bring it again a major step forwards serious engine modifications are needed, being it for more boost or more displacement. Am certainly not going for more boost pressure, as that means more noise (also at cruising speeds), so that is out. Increasing engine displacement has been on my mind for long now, and I already have some rough ideas on how to do it and plan at least to go to 4.8.
Sorry, but that day was only to let you know if he could write also to the TCM as a test, this was for myself a milestone so thought it was important enough to share. The TCM has later been updated with a more suitable base map, and also some fine tunings as request. It is in the post, and I hope to get it today, sorry for the long delays
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#107
#108
#109
#111
#112
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You should have seen the smile on my face when my wife told me that there was a package for me. Unfortunately it wasn't the one, after checking they mentioned that the guy who should have send it last Friday had forgotten it, so it left only yesterday and should arrive early next week, am slowly geting
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#113
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You should have seen the smile on my face when my wife told me that there was a package for me. Unfortunately it wasn't the one, after checking they mentioned that the guy who should have send it last Friday had forgotten it, so it left only yesterday and should arrive early next week, am slowly geting ![Icon Nut](https://www.jaguarforums.com/forum/images/smilies/icon_nut.gif)
![Icon Nut](https://www.jaguarforums.com/forum/images/smilies/icon_nut.gif)
LOL. Well, today I found a locking 3.58 locally. I suppose it's a good thing for $400 with a front plate. So I'm going to buy it in hopes that the TCM can be reprogrammed reasonably. So for now I'm keeping my fingers crossed
![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
EDIT: I'm "exhausted" with the whole differential fiasco. To turn things around and find a positive thing about the whole rear end being out of the car and the car on the lift, I ordered a full Borla cat-back. Should be way easier to get it in the car with the rear end out of the way. I think I got a good deal too so once it arrives I'll do a post on it and share the info where I got it from with anyone looking for a "deal" on one of these.
Last edited by adam699; 03-09-2012 at 06:16 PM.
#114
#115
#116
#117
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Have received the package, hopefully later today I can test drive ![Icon Dance Twist](https://www.jaguarforums.com/forum/images/smilies/icon_dance-twist.gif)
Update: Installed it, but unfortunately got an error. So the good news is that something has changed, just not good enough... Probably have to send the unit back again (although am awaiting feedback first), so this could take some time before we will finally know.
![Icon Dance Twist](https://www.jaguarforums.com/forum/images/smilies/icon_dance-twist.gif)
Update: Installed it, but unfortunately got an error. So the good news is that something has changed, just not good enough... Probably have to send the unit back again (although am awaiting feedback first), so this could take some time before we will finally know.
Last edited by avos; 03-13-2012 at 09:10 AM. Reason: Update
#118
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Have received the package, hopefully later today I can test drive ![Icon Dance Twist](https://www.jaguarforums.com/forum/images/smilies/icon_dance-twist.gif)
Update: Installed it, but unfortunately got an error. So the good news is that something has changed, just not good enough... Probably have to send the unit back again (although am awaiting feedback first), so this could take some time before we will finally know.
![Icon Dance Twist](https://www.jaguarforums.com/forum/images/smilies/icon_dance-twist.gif)
Update: Installed it, but unfortunately got an error. So the good news is that something has changed, just not good enough... Probably have to send the unit back again (although am awaiting feedback first), so this could take some time before we will finally know.
![Smile](https://www.jaguarforums.com/forum/images/smilies/smile.gif)
I should get most of the parts for assembling this thing today.
#119
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Should be a simple one I would guess, P1643. This could either be the unit having an issue due to transport (small chance), or it is in the specific programming. Am awaiting feedback now.
Changing just the gear ratio was a much simpler task, is this something you want me to discuss? Or do you want to wait for a fully tuned version?
Changing just the gear ratio was a much simpler task, is this something you want me to discuss? Or do you want to wait for a fully tuned version?
#120
![Default](/forum/images/icons/icon1.gif)
Should be a simple one I would guess, P1643. This could either be the unit having an issue due to transport (small chance), or it is in the specific programming. Am awaiting feedback now.
Changing just the gear ratio was a much simpler task, is this something you want me to discuss? Or do you want to wait for a fully tuned version?
Changing just the gear ratio was a much simpler task, is this something you want me to discuss? Or do you want to wait for a fully tuned version?
![](http://cdn.memegenerator.net/instances/400x/16200260.jpg)
Well, it will all depend if I can figure out a way to slap it together and make it driveable in some respect. If I can live with it than I can wait for a full tune. If I can't than the gear change would be the way to go.
As far as the P1643, try to re-seat the TCM connectors. Sounds like the CAN bus can't communicate. I'd also try cycling the battery.
Last edited by adam699; 03-13-2012 at 10:59 AM.