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This looks interesting! After two fluid changes, replacing all seals and a transmission reset, I still have a hard 1-2 shift. No 2-1 lurch. Looking forward to learn how you out with this.
Did you do the official JTB00145 ZF Adaptations Drive Cycle procedure? If not, that would be my next move....
Yes, I was lucky enough to find a local jag owner contact with the software, willing to waste a few hours on a Sunday morning to do the reset. Not that easy, by the way. Takes a gentle foot. Specially the 1-2 shift.
Seems like for every change I think something has improved. However after driving for a while it is same old -same old again. Wondering now if transmission temperature has anything to do with this. Seems to shift fine on cold start. Trying to figure what my next step should be.
This looks interesting! After two fluid changes, replacing all seals and a transmission reset, I still have a hard 1-2 shift. No 2-1 lurch. Looking forward to learn how you out with this.
Still waiting for the lift to be available. That and the stay-at-home order. Looks like another week or so before we can tackle this. Oh, and on top of all this, it looks like my battery is suspect - 6 years old and much of that time it sat, even though the previous owner kept a trickle charger hooked up. Wonder if that contributed to the issues... Will be getting a new one along with doing the valve body changeout.
And the weather today is absolutely gorgeous! A shame to see the XK languishing in the garage. May have to take the TF out for a spin - short one at least...
Will definitely report what progresses when we get to it.
As with most, stuck at home, so been watching videos on ZF 6HP26 repairs; saw in at least one that 3 of 5 or 6 (?) solenoids did not hold pressure and were replaced. The video was at a trans shop, and he sent the solenoids out to be tested...or perhaps it was the valve body and solenoids that were sent out...not sure.
Anyways, got me wondering if this is something that should be done....but where to send is the question.
Would be cheaper to actually by new solenoids rather then send out to test and find several bad ones and then buy a complete set new. You cannot buy individual ones as far as I can tell.
They are all the same age so if one is bad others are likely to be bad or go soon maybe.
As with most, stuck at home, so been watching videos on ZF 6HP26 repairs; saw in at least one that 3 of 5 or 6 (?) solenoids did not hold pressure and were replaced. The video was at a trans shop, and he sent the solenoids out to be tested...or perhaps it was the valve body and solenoids that were sent out...not sure.
Anyways, got me wondering if this is something that should be done....but where to send is the question.
Mickey....are you replacing the solenoids?
Pretty sure the remanufactured valve body would include those. They certainly look new.
Mickey; are you saying that new solenoids came with the reman'ed valve body you got? Your picture does not show the end where the solenoids are at....which is why I was asking.
The valve body I received includes the TCM and all the solenoids. As I mentioned above, the solenoids look new. And I can't imagine they would go to the trouble of remanufacturing the valve body/TCM without installing new solenoids.
PERFECT!.....and yes I agree the solenoids would be new. I was just not understanding that the solenoid pack was included with the assembly you got.
Now I am sure this would fix the trans issues of my XK8...and hopefully yours as well.
Did you ever get the four tubular seals from Whatever It Takes?
Since I am almost paranoid about this transmission, I crawled under yesterday to double check the fluid level. It was low just about 0.75 liters. I don't understand why or how. I did the fluid change by the book. Only good thing is that I have not driven much since i did the last fluid change and hope that no damage was done.
Now we'll see if the added fluid will affect the shifting????
Just topped mine up yesterday. I am now using Mercon SP.
I topped it up when temp was about 20 C and waited for the fluid draining out to reach 40 C before putting the plug back in which I never get in first try.
Very important to take the temp of the fluid coming out to get the correct temperature OR use something like jlr sdd to see what the the temperature is.
Taking the temperature of the pan itself will give you an incorrect reading.
PERFECT!.....and yes I agree the solenoids would be new. I was just not understanding that the solenoid pack was included with the assembly you got.
Now I am sure this would fix the trans issues of my XK8...and hopefully yours as well.
Did you ever get the four tubular seals from Whatever It Takes?
No, but I bought some from another source. Cheap insurance, even though the ones in there now were replaced when we did the drain and refill.
Probably will be another week or so before we swap this out. Gettin' anxious, but staying safe!
Just topped mine up yesterday. I am now using Mercon SP.
I topped it up when temp was about 20 C and waited for the fluid draining out to reach 40 C before putting the plug back in which I never get in first try.
Very important to take the temp of the fluid coming out to get the correct temperature OR use something like jlr sdd to see what the the temperature is.
Taking the temperature of the pan itself will give you an incorrect reading.
Interestingly enough, there was only about one deg. C difference between oil temp from transmission sensor, read on iCarSoft LR2 and the pan bottom read on IR meter. To me that means that either one is good enough. Even ZF gives you a temp. range and if you stay somewhere in middle either method should be good enough.
