tici

iTrader: (1)

...it sounds simple, but not if you live in Europe!
I'm loosing my 3rd gear because the stock trans is too weak for the power I'm making.
If I rebuild it here it will cost me an arm and a leg and it may be cheaper to buy a rebuilt + beefed up unit from the States (or Canada).
What company / vendor do you suggest?
I won't be able to send it back because "ooops, it's not the right one!". Once it's here it's here. That's why I need a serious company.

I need a replacement automatic transmission (4L60E) for a 98 Trans Am included stronger torque converter (with TCC).
It's not for drag racing, it's a daily drive with some spirited WOT's from time to time.
Power level: see sig.

Thanks - Stefano (Switzerland)

Ragtop 99

iTrader: (7)

That's a big gamble. I'd talk with FLP (Sponsor---->) or Rossler. Hard to beleive that buying a tranny shipped w/o a core would be cheaper than buying parts and having it done over there.

69firebird

iTrader: (14)

the 4l60e came in alot of BMW's are you sure you cant find someone to do it there?
ed

1QuickT-A

iTrader: (12)

I'd recommend Dave @ Rock On Transmissions... His tranny has held up damn good in CABLEBANDIT's Twin Turbo T/A with over 700rwhp..

SmokingWS6

iTrader: (1)

Rossler, they claim you can't break it.

I know a few overseas tech members have ordered built transmissions from the us and had them shipped.

tici

iTrader: (1)

To bring the car and let them do the job it will cost $5000 or so.
To do the tranny alone $2500 - $4000
I know a good speed shop over here and for beefed up trans they order them in the US 'cause over here nobody drives cars with 400+ HP, so the tranny shops won't know how to beef them up.
Sad but true

I'm now considering different possibilities:
- rebuilt here
- beefed up from the US
- A4 - M6 swap (parts from the US)

The last one is obviously the most complicated, but you know how addicting are those things...

cablebandit

iTrader: (37)

Dave at RockOn has sent 2 trannies overseas....his number is in the video in my sig

tici

iTrader: (1)

How is the driveability of those beefed up transmissions?
Are they good for a daily drive? Or will they shift hard like hell in every situation?
Is it still possible to adjust everything like the stock transmission?

XTrooper

Dynotech or Rossler.

tici

iTrader: (1)

Hi Steve, how are you? Do you remeber our chat about the injectors?
Do you still have the stoch transmission? We have about the same amount of power...

I see prices between $2000 and $2500: are there real differences between the transmissions? It's real difficult for me to choose one: I'll have to call all those peoples and see what they say.

Can I assume that they are all about the same?
Dynotech
Rossler
Rock on
FLP
??????

cablebandit

iTrader: (37)

Mine is a daily driver and drives like stock.....the shifts are normal feel, under normal driving

SmokingWS6

iTrader: (1)

They can be daily driveable, they will shift harder. However with a built trans you'll need a nice torque converter which will eat up some of the harshness of the shift.

XTrooper

Yes. I remember our conversation very well. Yes, also to the fact that I still have the stock tranny and my fingers are crossed.

When I make the change, I'll probably go with a Dynotech tranny, but I think most if not all the trannies in your list are well-proven.

Scalpel

iTrader: (4)

Rossler is the best one you could go with, IMO.

However, I believe they're slightly over $3K for the beefed 4l60E.

tici

iTrader: (1)

I called a couple of shops and they all suggest to use a vacuum modulator for the tranny pressure. In this way the PCM will only command the shift speed (part throttle and WOT). The pressure will be completely depending on mechanical matters.
Is that normal? Are you "beefed up guys" also have a vacuum modulator? What is your experience with it? positive / negative?

SmokingWS6

iTrader: (1)

This is true, but you have a boosted application. Vacume modulation works by increasing pressure as manifold pressure drops. I think it can be done but i'm not sure how.

tici

iTrader: (1)

Well, I really prefer to keep full control of the transmission using the PCM.
Sure the vacuum modulator works, but why loose the ability to program it?
They just told me that many people will mess with the program increasing or lowering the pressure too much wich results in braking things.
My goal is to have a "stock transmission" able to handle the power I'm making.
Stock transmission = same behaviour as stock.

maddboost

iTrader: (11)

A check valve on forced induction applications will take care of this.

Stefano I believed I talked to you today as well as Chuck. The vacuum modulator only takes away the computers ability to adjust line pressure, nothing else. Chuck has found through extensive testing that vacuum modulation allows the correct pressure at the correct time allowing the transmissions to hold up to more power and last longer. Far too many tuners crank up the line pressure and burn out the pump and shortly after the trans follows. Chuck's transmissions are running in atleast a numerous cars in Europe from two twin turbo 427s in Sweden to even a Impala SS that has gone almost 200 mph on the Autobahn. Not to mention the countless other blower and H/C cars. He will build you the best transmission possible.

tici

iTrader: (1)

Yes that was me
I had an interesting conversation with Chuck and I still have to clarify the shipping costs if I organise that from here.

What I still don't understand is what is the difference between a reinforced 4L60E working with the stock transmission settings (full electronic) and the same unit using the vacuum modulator to command line pressure.
Are the stock setting sub-optimal? Are they good only for the stock tranny and won't work with a beefed up version?

Checkvalve for boost applications: where exactly? Will this release the pressure between manifold and the modulator?

cablebandit

iTrader: (37)

vacuum modulation is nothing more for you than hooking up one vacuum hose. Now when you give the car a little gas..you get a little more line pressure...lots of gas..lots of line pressure. You WANT vacuum mod......I can burn up FLP or anyone elses including my Rock On tranny by screwing around with the line pressure tables in the pcm IF it isnt vacuum modulated.