4L60E 4WD application info request

[Bernard Fife]

Does anyone have an idea of what the 4WD speedo ratio is likely to be (so I can set the range in the INI file). The limits on the value are from 0.001 to 65.535 in the code (it is an int/1000), but I don't expect those possible limits to be used in practice of course!

Lance.

[ca434sbc4]

Lance,

This is going to vary with the transfer case design. The one transfer case I have data on, low range is 2.69:1 reduction. You'll need to make this a setable value via MT.

Marc

[Bernard Fife]

Marc,

Thanks Marc, I will set the default to 2.69:1 for now.

I realize it has to be user-serttable (it already is in the code and MegaTune), I was just wondering what the real world range is (like from 1.55 to 4.10, or whatever).

I hope to release draft code sometime in the next week or so, it will have the 2WD/4WD speedo switching, the variable resistance/voltage (Ford) based shift lever position detection, the 'clutch' outputs (that function only during a shift), and updates to the CAN scheme (to match Al's more efficient scheme that came out in the beta 3.1 code).

Lance.

[mp15dc2000]

Lance,

The range of transfer case low ranges are 1.96,2,2.61,2.72 the most popular for manual or electronic shift, new venture case.
2.48,2.74, 2.69 for the borg-warner case. and for the import 1.96,1.99,2.28,2.31,2.57. the aftermarket t-case can go as high as
6.00:1 that i have seen. there are possiblely others but these would be the most common, i hope this helps.


Brad.

[Bernard Fife]

Brad,

Yes, that's very helpful! I will set the range from 1.96 to 6.00:1, and the default at 2.69:1. Then I will document the possibilities you mention in the manual. (People can always extend the range by changing the INI file - they don't need to do anything to the code.) Thanks!

Lance.