Anyone had there gearbox rebuilt upgraded on LS1 motor?

[Corv99]

not sure if the Manaros come with auto trans option, or indeed its the same..
but wondering if any of you have had yours rebuilt to take a supercharger type power?
so a rebuild and upgrade?... tempting to just leave and see what happens, but I think that may be tempting fate a bit!!

whats involved and what cost etc

its for a vette, posted in that forum too, but as we share mechanicals was hoping maybe some one here has done it?

thanks

[Corv99]

ARAF said:

The Monaros are manual only. The VXRs come in auto, but I don't think anyone has uprated their gearbox, though I think flex plates and torque converters have been changed.

I thought maybe that was the case,
I guess VXR's are later and maybe LS2 as well?

[Corv99]

ringram said:

Gareth and I had built LS1 auto's he has a 4l65e behind his 457 stroker.
I had a stage4 4l60e his is stage5 IIRC.

Both from finish line transmissions in the US.

Hi RingRam
is 4165e and Stage5 IIRC gearboxes? and sounds like maybe you imported some complete from the states?
would love to do that, but not worth the expense etc for my project I don't think, I'm not going to extreme
HP and torque, just for it to stand a charger really better than a stock one..

[Corv99]

thanks Guys..
I'm not chasing extreme HP etc, just looking to add a Magnussen 1900 and roll with what it delivers..
already got uprated headers, Xpipe, throttle body, sports cats etc on it.. would love to add a FI system
and want to do use it for road use, not wanting burnouts etc, just increase perfomance, and feel this is best bang for buck..
in terms of trans its a needs must, don't reallty want to import anything as you say 'shafted' comes to mine.. just want to
do whats need to mine to cope... hoping theres someone here can do this? and rough cost estimate really..
if its going to be too silly project might crash and burn before starting..

[Corv99]

ringram said:

Quoted for posterity

Ha ha! yes I know... but I'm determined to stick to a budget, and controllable power, aware it could be a slippery slope!

[Corv99]

Wyld Stallyn said:

Too La aa a a a te

[Corv99]

SturdyHSV said:

These FI boys really don't like you Rich!

I think the general gist of the thread is there isn't an easy, known, off the shelf solution in the UK. We just don't get that luxury like they do in the states.

It's going to require research, along the lines of:

Find out what power an LS1 with a tvs1900 typically makes (whoever is going to install and tune it, they may already know)
Once you have this figure, find out what transmissions others have used with this power level. Look for the horror stories and breakages.
Find out what transmissions will hook up to the LS1, and find out their rated power levels, and ideally what power people have put through them in real life.
Come to the conclusion of what transmission you're going to need or what you'll need to do to your stock one.
Price up the trans / installation / upgrades and then decide whether you can continue

As a note, the LS ECU has a good selection of torque limiting abilities to protect the trans (the LS2 does at least) so you could 'in theory' run with the stock trans with the engine limited a bit whilst you sorted it out. I say in theory, as this is another area you'll need to research

thanks Sturdy
Yes been trawling threads, and there are certainly many, particularly in the states, as well as opinions! think I have started a few fights over there now!!
but was you say makes sense, and indeed we have less options here.... been talking to gearbox guys today, about what options, and I think I'm going to factor this in, either to do in prep, or basically have it ready to be done if need arises... talking to some guys on here,and the states, seems box's go from going at 100miles, to still going now after years of use! luck plays a part..

but good point on the ECU actually, I guess it may get confused at sudden changes to set up!

[Corv99]

MyM8V8 said:

What I can tell you is that I built a box over here and the bill of parts was just short of 3.5K. It lasted 12 miles before stting itself, taking a brand new $1000 stall convertor with it.

My advice is to be modest, forget the blower, because it will make more than enough power to test your convertor and trans. You have a car with great power to weight ratio anyway. Theres a lot you can do with heads cam and intake. You will need to upgrade that 4L60 to at least 4L65E specification.

I ran a stock 4l65E (with a circle D stall) on the back of a cam and intake LS2. It did over 300 passes up the 1/4 and still works. This is a far superior trans if you can find one to fit your motor and you will need a modest trans map.

There is a guy on here with an LS1 Camaro who, IIRC, only did cam and tune and had problems with his (4L60) trans as a result.

Hope this helps and good luck.

many thanks for advice MyM8V8