Seeking Advice on tuning a heavily modified 4L60E

[HellKnightHicks]

Here are the details on the Tranny

http://www.maddogtransmissions.com/L...lash-4l65e.htm

Level 4 transmission
Mad Dog shift kit
Raybestos 15 clutch Z-pak (replaces factory 5 clutches in the 3-4 drum)
Raybestos high temp high energy clutches through out the rest
all new steels, band, bushings, and rings.
A 500 boost valve
10 vane pump rotor.
4140 hardened pump rings.
Specialized bronze ring to re-enforce the hardened input shaft and drum.
TEFLON pump bushing
29 element double-gauged sprag
4 pinion planetary gear (which has also been cold-freezed)
3" wide high-temp Pro-Series Kevlar band
Corvette Servo/Super Sonnax 4th gear Servo
Beast heavy-duty Sun Shell.
Sonnax aluminum accumulators
Stage 3 Shift kit Saturday night special. Described as "very violent!" (Its firm but i wouldnt call it violent)

Final results of day 3 with some tranny changes.tun

Tourq Reduction has been disabled.
Line pressure for the 3->4 shift has been up to no lower than 71 across the board.

What changes to the tune would you guys recommend. I am still dialing in the VE table but am doing some small mods to the tranny's tune at the moment.

Thanks

PS I've spoken Breifly with Taz about making some changes to the tune and he reccomended that i post my tune and start a thread

The transmission is not Currently BANG shifting or breaking traction during shifts. (not that its desired to do so. More or less just to let you guys know how its acting.)

[Taz]

Good description of the transmission hard parts. It would be helpful to describe what is good / not good from your perspective for each of the shifts - 1>2, 2>3, 3>4, and 4>3, 3>2, 2>1.

Once the Forum membership understands how you would like it to shift, suggestions will probably start flowing.


Regards,
Taz

[Taz]

Took a very quick look at the tune you posted. The 1>2 and 2>3 Shift Times increase with increases in delivered torque - these should either be constant , or decrease with increases in delivered torque.

I would also recommend disabling (zero out) the Low Pressure Adjust for all shifts. That way, shift pressures are at minimum that which you configured - High Pressure Adjust could remain active.

Once you describe the shifts - more suggestions will no doubt follow.


Regards,
Taz

[HellKnightHicks]

Leveled 1->2 D1108 to .225
Leveled 2->3 D1109 to .25

Zeroed
D1101 Low pressure Adjust 1-2 to 0's
D1102 Low pressure Adjust 2-3 to 0's
D1102 Low Pressure Adjust 3-4 Already 0ed

Upped 3->4 D0703 table to 65PSI

I wont make any complaints until ive tried this modification.

Though going from a stock TC to a 2000~2200 is quite an adjustment. lol its so odd that your shifting gears and the rpms really arent changing (at low throtle).




Lowest values in the stock tables.

[slows10]

Why not drive it for a while and put some miles on it and get used to it? I dont see a specific complaint Did the trans builder to tell you what values to use for your specif application?(maybe I am missing the obvious?) The trans sounds like a well built unit. With hard parts that are obviously needed with this trans. This trans build is a basic hi-po build that is needed for perf use. This parts combo has been used 10,000 times before. It is what is needed to make this trans live. I would like to see a review of how you think this trans performs, for the dollars invested. If this is going in a heavy truck with some sort of forced induction there are many stories of failure. Hope yours is different. I we and some friends have taken the best 4l60 in the mid to late 90s and easily pushed them to their limit, as many others have.But that is with old software not old hard parts. Kinda hoping your thread will be differnt and people with alot more trans exp will chime in and help get this thing set up right.

[HellKnightHicks]

Thanks for the reccomendations Taz
The shifts are much more consistent.

The only complaint that i have at this point is the 2-3 shift. It feels as though it stiff like i like it at low rpm but more mild with more throttle.

I may go ahead and up the 3-4 shift pressure to 96 psi It was much firmer and consistent @ 71 (thx again Taz)

What can i do to make the 2-3 shifts more consistent?

[slows10]

You can try reading the many threads on this forum about transmission function and tuning. Joecar has spent a ton of time posting tutorials and info with the answers to your questions. They are a great read to understand how this trans works.

[joecar]

BTW:

- in your tune file, set PE B3618 to enable easier (e.g. compare with stock 2002 Camaro);

- set PE Delay Counter B3609 to zeros;

- may want to set Max Allowed Engine Torque B1901 to some higher value.

- since you have failed the MAF, set P0101,2,3 to either of A:1-Trip or C:Non-Emissions in C6001.

[joecar]

D1207: lower this a little (compare D1206, D1207 with stock 2002 Camaro).

D0703: looks wrong (should have no zero flat line, should look similar to D0701, D0702).

D1101,2,3: I agree with Taz, zero these.

D1108,9,10: set these to 0.2s all across.

D0960,1,2: set these to all 100%.

[joecar]

Make sure each WOT downshift MPH parameter is below the corresponding WOT upshift MPH parameter (at least 5 mph lower)

( same applies to each TP axis point of the PT downshift/upshift tables )