4L60E 4WD application info request

A forum for discussing applications and implementations of the MegaShift transmission controller code for the GPIO from B&G. This can control up to 8-speeds and 6 shift solenoids (plus a 16x9 table for controlling a PWM line pressure valve). It has manual and fully automatic modes (16x9 load x speed table), with under and over rev-limit protection, and full data logging of all inputs and outputs (among many other abilities). A TransStim to test your completed board is also available.
Bernard Fife
Posts: 1696
Joined: Fri Apr 04, 2008 1:28 pm

Re: 4L60E 4WD application info request

Post by 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.
"Never wrestle with pigs. You both get dirty and the pig likes it." - George Bernard Shaw
ca434sbc4
Posts: 8
Joined: Sun Sep 14, 2008 8:43 pm

Re: 4L60E 4WD application info request

Post by 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
Posts: 1696
Joined: Fri Apr 04, 2008 1:28 pm

Re: 4L60E 4WD application info request

Post by 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.
"Never wrestle with pigs. You both get dirty and the pig likes it." - George Bernard Shaw
mp15dc2000
Posts: 5
Joined: Sat Jun 07, 2008 4:45 pm

Re: 4L60E 4WD application info request

Post by 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
Posts: 1696
Joined: Fri Apr 04, 2008 1:28 pm

Re: 4L60E 4WD application info request

Post by 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.
"Never wrestle with pigs. You both get dirty and the pig likes it." - George Bernard Shaw
Post Reply