how many "updates" have you done? Where did you get ‘em and what did you ask for?... On Infinitihelp.com I see 1 TSB relevant to the TCU and it's for 03 only and it only addresses Reverse to Drive issue...

Tell us your personal experience with the "updates"... also, did you ever find the "lifetime TCU" updates you mentioned?... that would be something worthwhile.

Anything other than that - I simply do not care. Period.

 

How are updates uploaded? That is the question.

From the link I provided, there were two TCU TSBs that I saw.

Exactly WHERE did I ever mention "Lifetime TCU updates"??

Link? Quote? You are confused my friend.

 

post # 13... you said for the life of me and I misread to say lifetime... however - that company info (that you can’t remember) would be about the only benefit... I looked up the TSB on Infiniti’s site - only found what I mentioned above... How the TSB is programmed ha no relevance to the OP question or any of the other posts in the thread regarding harsh shifts, slow shifts, etc...

So - now are you going to answer the questions I asked? how many "updates" have you done? Where did you get them? and what did you ask for?... and don’t forget to dig up that company that does after market "Tranny ECU" udates

 

I believe you original contention was clearly that the dealer cannot and does not offer ecu/tcu reflashing. Now the link I provided was to a specific tcu reflash. I quote Dave O

Now is it your contention that Part Number 23710-AM604 does not exist? And that Dave O did NOT get this latest (at the time) software reflashed to his TCU?

How the latest changes get uploaded onto the ecu/tcu is exactly revelant as you specifically said the dealer does not reflash or aka have the ability to upload new info onto our ecu/tcu.

You contend that reflashing is not the same as what the dealer does. Then illustrate the differences for us.

It's difficult to convince the dealer to get this done NOT because it's not possible. But because it's difficult to find a service tech that even knows about this software reflash p/n.

Exactly how is asking my how many I've done and how/where I got them done illustrate the existance/non-existance of this reflash?

 

Have a great day though. I hope people have found this info educational. I'll try to find that link to the tcu upgrades for ya. Stay tuned.


I've been meaning to try to dig it up. I just can't remember if it was here or the Z forum. I do remember it was a company normally doing stuff for the domestic side autos.

 

^^^ typical... can go on and on about everything except answering the question.... that's okay - like most of your posts the answer is you have no personal experience with it - you just go by what you have read.

Unfortunately none of it did anything to address the thread topic. However that’s not unusual fro you either.

 

Is there a link for the TSB about slow shifts for the earlier model coupes? I would like to print it out and take it to the dealership to see if they can in fact upload a different map for the transmission.

Sean

 

I'm not quite sure of the revelance of the question here. Why ask? Yes or No doesn't seem to progress the thread. Dave O got it done. So it would seem that reflashing or if you would prefer the term "reprogramming" is indeed possible.

Aero alludes to getting a reflash at the dealer might help the issue mentioned in the original question. He even provides a post to the reflash and that it was done at the dealer.

So anyone reading the original poster's thread might find a solution in a reflash. Although since it pertains to a later tranny and it's tcu.

 

Nismo. The link I provided was SPECIFICALLY for your early coupe. As said, the trick is not how hard it is to reflash, the hard part is convincing the Infiniti tech that particular software upgrade even exists! I've read posts where it's important to talk to someone in the service dept that actually knows what they are doing and is willing to acknowledge that a customer might know something they do not.

Now when you say "slow shifts" I only assume you are referring to the slow rate the tcu is willing to downshift the tranny when you hit the gas? Or are referring to a slow rate that the tranny upshifts? ie... how firm the tranny shifts?

 

When i say slow shifts its that the car upshifts really slow. Then from other gears like 2nd to 3rd it seems so fast that the transmission "cant" keep up with the wheels or something. Its almost boggy....

Downshifts seem fine to me, but upshifts seem to be all mis timed...

-Sean

 

I'd try to see of your auto has the latest software p/n as per the link. It would be a start.

Despite the slow shifts, you rip off some great 1/4 times though!

 

there is no actual TSB regarding slow shifts... the link Jeff referenced earlier is DaveO’s – he has an uncommon version 1 car… unless you have the first version ECU and TCU, you might already have the software mentioned… and apparently it helps full auto not MM so much. 04.5 the TCU went from in cabin to in transmission so many of this reference only applies to pre-04.5 and like I said early, early versions of 03 are even more different (Dave’s version 1 ahs an ECU plug that isn’t compatible with Osiris cable… now that’s a rare car!)

Anyway – as I previously stated a valve body upgrade is your best bet to improve shifts. Ground Wires have been reported to help incrementally (I noticed small diff but not much, might help more on earlier cars). And if you decide you might like shorter gears – the 3.7 FD ring & pinion actually helped my shifts quite a bit (shift shock and delay) – don’t ask me to explain how or why because I really don’t know, but it’s noticeable.

Chasing TCU “reflashes” and TSBs just isn’t worth it. Try the things that many people have had success with (mentioned above).

 

Or try this. Hmm since I do have a type 1, I guess my quote about Dave's post is good to go. At least for me. lol

I did find the at upgrade company though.

 

True, i bought the car like the day after the arrived at the infiniti dealership so it really was once of the first ones on the road...

-Sean

 

^ trying to get them down some more...no new mods though.

How can i figure out if my car has the latest software? I don't see the link that you provided...does it do this per vin number?

-Sean