LS4 / F40 swap - fieroguru (Page 131/216)
PK FEB 27, 11:10 AM
I asked if they could point me in another direction to find this info but they didn't have any ideas.

If I can think of something I will report back.

fieroguru FEB 27, 10:46 PM
Thanks for taking the time to look. They always said that the F40 was non-serviceable and it looks like that is indeed the case.
Rickady88GT MAR 01, 12:58 AM

quote
Originally posted by fieroguru:

Thanks for taking the time to look. They always said that the F40 was non-serviceable and it looks like that is indeed the case.



Makes me wonder if it was made to be non-serviceable or if they just decided for some reason to abandon it?
Rickady88GT MAR 01, 01:03 AM
I have not looked into GM power trains in a few years, so my question is what manual transmissions does GM use on V6 and high output 4?
fieroguru MAR 01, 07:54 PM
GM has been using the F40 for well over a decade and it is still being used in current model year applications.

It is currently being used on turbo 4cyl and high feature V6s... GM didn't abandon it, they probably didn't expect or want people to swap ratios
fieroguru MAR 04, 05:13 PM
As I continue to research the AWD upgrade, I found a diagram of the F40 AWD unit. It is a low exit (which is needed to get under the crankshaft) but the output points to the rear and it needs to point to the front. With a custom case half that bolts to the transmission, the output shaft should be able to be rotated about the ring gear 180 degrees which will point it in the right direction while keeping it a low exit.

Just have to get one of these units, take some detailed measurements for the housing, bearings, and bolt locations, buy a large chunk of aluminum, and spend lots of hours making chips...

Bob2112 MAR 04, 05:31 PM
Your level of ambition is inspiring. I think I take on some projects, but this is a whole 'nother level.
Rickady88GT MAR 04, 11:27 PM

quote
Originally posted by fieroguru:

As I continue to research the AWD upgrade, I found a diagram of the F40 AWD unit. It is a low exit (which is needed to get under the crankshaft) but the output points to the rear and it needs to point to the front. With a custom case half that bolts to the transmission, the output shaft should be able to be rotated about the ring gear 180 degrees which will point it in the right direction while keeping it a low exit.

Just have to get one of these units, take some detailed measurements for the housing, bearings, and bolt locations, buy a large chunk of aluminum, and spend lots of hours making chips...




Don't forget to get the other differential. The gear ratios will need to be be evaluated as well.
Rickady88GT MAR 04, 11:29 PM

quote
Originally posted by fieroguru:

As I continue to research the AWD upgrade, I found a diagram of the F40 AWD unit. It is a low exit (which is needed to get under the crankshaft) but the output points to the rear and it needs to point to the front. With a custom case half that bolts to the transmission, the output shaft should be able to be rotated about the ring gear 180 degrees which will point it in the right direction while keeping it a low exit.

Just have to get one of these units, take some detailed measurements for the housing, bearings, and bolt locations, buy a large chunk of aluminum, and spend lots of hours making chips...




What vehicles were these available in?
fieroguru MAR 05, 09:05 AM

quote
Originally posted by Bob2112:

Your level of ambition is inspiring. I think I take on some projects, but this is a whole 'nother level.



Thanks! For me the fun is in the challenge, problem solving, and doing something unique!


quote
Originally posted by Rickady88GT:
Don't forget to get the other differential. The gear ratios will need to be be evaluated as well.



I plan to pick up the whole drivetrain if possible: transmission (so I get the differential with the spline extension to drive the AWD unit), the AWD unit, drive shafts, rear diff and axle shafts.


quote
Originally posted by Rickady88GT:
What vehicles were these available in?



AWD Saab 9-3 and 9-5 roughtly 2005 and newer for cars in the US. Many that I am seeing are 2009 and 2010. Several other applications over in Europe with Opel and Vauxhall.

[This message has been edited by fieroguru (edited 03-05-2018).]