LagondaNet

Scott · Posted: Sun Feb 06, 2011 3:43 am Post subject: Transmission

Can anyone enlighten me on the specific model of Chrysler Torque Flight Automatic Transmission used in the S2 Lags?
Thank You,
Scott
_________________
Evel Knievel had the right idea. 13346, 6,805mi

jonc · Joined: 21 Sep 2010 Posts: 584 Location: Cheshire, UK

My guess is 727. This appears to be the model used on the V8 and I would see no reason why the slightly smaller 904 would be used on the Lagonda. Lots of great info on the workings here: http://www.allpar.com/mopar/transmissions/torqueflite-tom-hand.html

None of the docs I have refer to the specific model. The 'Lagonda Instruction Book' gives lots of specifics on lots of parts, but unfortunately not the gearbox..

Jonathan

Scott · Posted: Sun Feb 06, 2011 3:23 pm Post subject:

Thanks for the quick reply Jonathan. 727 is what I'm thinking. I noticed that in the parts cat. the trans case is "remarked" as 3410470. I'm thinking that is a Chrysler part number. I'm going to check it with a local Chrysler Dealer. They should be able to identify it if it is a Chrysler part number. Some of the other internals should specify the model, 727 or not. If that's the case a more modern 4 speed, like a 48RE, could possibly be used. I'm up to something, that's for sure.
Scott
_________________
Evel Knievel had the right idea. 13346, 6,805mi

Vrije · Joined: 23 Nov 2007 Posts: 440

Yup,
It,s a standard 727,as I have 3 in row on the shelf, a V8, a Lagonda and an interceptor , no differences and overhauled with chrysler parts of the local Yank specialist.

Harry

Dimitri · Joined: 13 Sep 2010 Posts: 180 Location: Smarden, Kent, UK

Sorry to unearth an old post but can this unit be converted to 4-speed or has anyone done it ?

Arnaud · Joined: 26 Oct 2010 Posts: 101

Would be interested by this kind of conversion also but that's a bit expensive just for an XJ40 transmission kit...

Puddle duck was doing it
I think they are doing it
http://www.gwautos.com/

Dimitri · Joined: 13 Sep 2010 Posts: 180 Location: Smarden, Kent, UK

Yes I thought G Whitehouse might be able to do this but costly indeed.
I'm sure someone somewhere has done it before.

Vincent · Joined: 20 Nov 2007 Posts: 1055 Location: Belgium

Ossi's car got a RANGE ROVER 4 or 5 speed automatic gearbox...
_________________
Welcome to Paradise ! (FRONT 242)
https://www.youtube.com/watch?v=XS30BC3D5WM

Vrije · Joined: 23 Nov 2007 Posts: 440

The Jensen Interceptor friends on FB have better solution. The later model 700 something box seems a straight swop over,will try to find it again

Vrije · Joined: 23 Nov 2007 Posts: 440

They call it the. A-518

Vrije · Joined: 23 Nov 2007 Posts: 440

http://www.hotrod.com/how-to/transmission-drivetrain/43323-mopar-overdrive-transmission-swap/

Vrije · Joined: 23 Nov 2007 Posts: 440

,who wants to be the ginea pig?
Lets discuss in person with Harry and see if we can run a deal on developing a straight Out and in swop kit as more more Lag fans seem to be intrested.

M

JohanB · Joined: 22 Mar 2015 Posts: 73

To get the real benefit of the additional gear from the Chrysler transmission, a swap of the final drive ratio would be good imho. Having the overdrive added will reduce cruising RPM but leaves other gears as they are. Of course it depends on what one wants to achieve. The A-518 is for sure the least complex approach to add a gear.
Other conversions use most likely ZF or GM (4L80E) boxes and are for sure more complex as these are ECU controlled and expect to interact with an engine ECU which in a Lagonda is either absent or wasn't designed to chat with a gearbox. I think Roos advertised having done a ZF 5HP30 (as used in the DB7 Vantage) conversion in an AM V8. Let's ask while we're there next week.

Lagondanet · Administrator Joined: 03 Jan 2007 Posts: 3109 Location: UK

I think Michael v. A has changed the box in 2 of his cars. ZF or BMW? Ask him in Gstaad.

Vincent · Joined: 20 Nov 2007 Posts: 1055 Location: Belgium

And as said, the final ratio between US cars and others is different too...
Maybe I'll swap mine in a near future to increase speed ( but is it well necessary ? ). More speed = less torque...
_________________
Welcome to Paradise ! (FRONT 242)
https://www.youtube.com/watch?v=XS30BC3D5WM