superjohn

Does anyone know what it takes to upgrade an 01-05 GS430 (2nd Gen) 5-speed to a 6-speed Automatic Transmission (A761E) from the later 06-07 GS430 (3rd Gen)?

This question could also apply to other models with the same engine and transmission...

Vehicles with 3UZ-FE 4.3L V8 and A650E 5-speed AT:

• 2001-2005 Lexus GS 430
• 2001-2003 Lexus LS 430
• 2001-2005 Lexus SC 430

Vehicles with 3UZ-FE 4.3L V8 and A761E 6-speed AT:

• 2004-2006 Lexus LS 430
• 2006-2007 Lexus GS 430
• 2006-2007 Lexus SC 430

iToaster

I would wager you'll need a custom driveshaft, custom wiring harness, shifter, maybe a custom transmission mount, and the appropriate ECU to control it. The ECU being the major problem given the immobilizer, likely incompatible body electronics, and wiring nightmare due to the different plugs. That said, I don't think it's worth it but it could probably be done.

GS4hunnit

Interesting idea. However, why don't you just go with a 6 Speed manual?

NorthStyle

iTrader: (16)

It's likely the 6 speed auto would cost less considering the V160 is a couple grand by itself, not to mention the rest of the parts needed to convert the auto to a manual... the V8s were never made to be mated to a manual unlike the 2JZ.

Alainis300

iTrader: (4)

If anybody has any more input on the possibility of doing this swap, I would be very interested because I would like to do this upgrade when and if my transmission ever decides to die on me. Thanks

NorthStyle

iTrader: (16)

I'd research the items the iToaster mentioned (transmission mount, driveshaft, etc.) and see if there were any changes in part numbers between the earlier and later SC430s. At least that way you have a basis from which to start testing given that the engine/body style didn't change.

clos430

iTrader: (21)

Everytime I drive a LS430/SC430 I think of how fun it would be to have a 6spd auto in my GS. If you really wanna do this, start researching part numbers and wiring diagrams. I'm pretty sure it can be done.

Cranix

Just throwing this out there. What about a 6 speed manual other than a v160. Has any one done that. v160's
just keep getting more and more expensive..... Gs430 should have come with a 6 manual in the first place!

angus

iTrader: (4)

I think as far as doing a 6spd auto is concerned - it would be way more cost and complexity than anyone would want.

The physical issue (while tough) would be easy compared to the electronics required to make it actually run - you'll basically need to convert to an 06 gs430 or similar ECU - and that would be a nightmare.

angus

iTrader: (4)

I believe guys are talking about using the 6spd manual from the 350Z…

You will have to look for it, but I have seen talk of it.

iamkhanz

Any movement on 6 speed manual setup for gs430... Id much prefer a manual over the automatic.. Would love to have a parts list and total overall costs to do the swap the right way what about lsd?

NorthStyle

iTrader: (16)

This conversion's been done, and kits have been created for it. You just need to search.

http://www.bulletcars.com/parts/gear...sion-kits.html
http://www.thor-racing.co.uk/Manual_...ersion-311.asp

iamkhanz

Thanks for the link i guess id like to move car forward in technology and improve gas mileage to some extend on highway along with the other advantages of a manual, didnt want 5 speed manual but instead a 6speed manual for gearing

iamkhanz

Also wondering if Any ecu issues would occur with respect to trouble codes? And im also wondering about mounting..in out gs430

Getrag V160 6 speed...

www.suprastore.com/tosuge6sptrn.html. So this 6 speed Is set up for supra since can this be used?

angus

iTrader: (4)

I think from what I saw, you need tunnel mods to do the V160

If I were to do it, I might try to do a V33 or T56 instead - the rarity of the V160 scares me - from a price standpoint and difficulty finding spares.