Cobb Tcm Question

[ecl]

Got my cobb today and am a bit bored at work. Don't have time to take the car to the workshop as it's the weekend but want to try to upgrade the TCM myself to see what the fuss is about in the meantime

I want to upgrade to LC5 and was wondering anyone know which map name and transmission type to select?

Map Name :

* Level 1 - 3300 RPM

* Level 2 - 3700 RPM

* Stock Style LC2 Logic

Transmission Type:

JF04B JF09D JF09E JW91A JW91B JW91D

[Martin Donnon]

When you go to install the TCM it will tell you which software version you have, then install KB15B (I think thats the code off the top of my head) LC4 VDC OFF V101...or at least thats what we like to use. Its nice

Once finished -

Set CC and TP values to zero then perform a Clutch Gear Relearn.

Set CC and TP to desired after that. Start with CC +1, +1, and TP 0, 0

[ecl]

Thanks Martin

last question - any value in saving the standard maps for future reference or is it available on the web?

[Martin Donnon]

I believe its actually resident in the AP anyway as the stock style LC2 map. I rarely save them unless submitting it to Cobb as a previously unseen piece. Hope that helps

[g35me]

What is the difference between cc and tp?

[g35me]

Why do you set them to 0 before the relearn then change them to your desired amounts later? What happens if you relearn on a + setting?

[ecl]

Did the upgrade to LC4 with VDC OFF as recommended by Martin and it is a day and night difference to the LC2. Smoother shifts especially from 1st to 2nd and no more shuddering when taking off slowly or slowing to a near stop and then moving off again. Will play around with LC5 this week to see what the difference (if any is).

[domino_z]

Id like to do this for the improved shifts, especially the 1st to 2nd at part throttle in traffic which lurches like crazy

But I really can't launch with anymore rpm than lc2. What is the rpm for lc4?

[Wardski]

Did the upgrade to LC4 with VDC OFF as recommended by Martin and it is a day and night difference to the LC2. Smoother shifts especially from 1st to 2nd and no more shuddering when taking off slowly or slowing to a near stop and then moving off again. Will play around with LC5 this week to see what the difference (if any is).

Hmmmmm The bunny hopping and mild shudder I get in 1st when cold is starting to bug me - as well as reversing the bl00dy thing up a slightly inclined driveway to get out of the garage is doing my head in trying to find the right acc balance point so that I don't launch into the street, or bunny hop or get that clunking clutch slip noise....

What to do what to do... I wanna keep my warranty, but I hate this shit..

[domino_z]

What happens if you relearn on a + setting?

[Martin Donnon]

Good work ecl!

Driving these cars around on an LC2 program...is well....just a waste of a car!

[domino_z]

Martin i have read between the lines and will get my cobb updated

[g35me]

Martin can you explain the CC and TP please. Should they be at different + levels?

[Martin Donnon]

CC = Clutch Capacity for Odd and Even gears.

Adjustments range from -7 to +7 and linearly increase clutch apply pressure when shifting.

Normally from the factory these are set to 0 (right in the middle)

On a moderately powered up car setting these to +2 +2 is a good step

In a high powered car then +4 +4 is the go.

I dont go much over that as its hard on the seals and gears to run massive pressures.

Its a feel thing.

TP = Touch Point for Odd and Even gears

Touch Point is best explained as the prepositioning or pre-load on the clutches.

Adding more Odd TP will give more creep in 1st gear at idle speed

I normally leave these as close to 0 as to get the desired driving result

Hope that helps

[domino_z]

great info Martin

i had the dealer raise the TP +1 and it helped with the bucking bronco moving off from rest

probably need +2 to get it perfect

Edited October 18, 2012 by domino_z

[Martin Donnon]

Fixed it for you -

great info Martin

i had the dealer raise the TP +1 and it helped with the bucking bronco moving off from rest

probably need LC4/LC5 to get it perfect

[domino_z]

haha how will lc4/5 improve the clutch take up point though?

i'm waiting on my code to upgrade the accessport - can be done through the ap manager now rather than having to send it back to US

i'm hoping the newer launch programs have better control on wheel slip, as 4000k lc will just dry my tyres even more than my current lc3

[ecl]

I was bored and flashed from LC4 to LC5. Maybe it's a psychological thing but I actually like LC4 better for day to day driving. It makes less sound and was a bit smoother during start/stop? I heard LC4 had more slip in the clutch, is this the reason?

I have since reflashed back to LC4 from LC5

[g35me]

I still don't get how LC makes any difference to the gear changes. I'm running LC5 and it's no different to my old LC2.

[g35me]

When you go to install the TCM it will tell you which software version you have, then install KB15B (I think thats the code off the top of my head) LC4 VDC OFF V101...or at least thats what we like to use. Its nice

Once finished -

Set CC and TP values to zero then perform a Clutch Gear Relearn.

Set CC and TP to desired after that. Start with CC +1, +1, and TP 0, 0

Ok. Just followed these instructions precisely. Now I'll take it for a spin and see what the difference is. Still CC at +3 otherwise there is to much slip.