Is it worth changing gears for better MPG's???

[DA BIG ONE]

try the resister to fool the tcc lock up, stay in 3rd gear, tcc should stay locked above 45 mph, don't use 4th on a hill, down shift manuel...

2nd gear will also lock tcc about 32 mph...
but you have to shift manuelly, as Trans will be in high pressure mode,


Need to shift like it's a std shift, un-throttle and match rpm to drivetrain.

I installed a sw for the TCC lock up, and a sw for the 3-4 shift,
2 sw's by the console to control shifting...

I'd like to try this, what's involved?

[rjwest]

50 ohm resister accross the tran emp sensor to ground, through a switch.
this will allow the TCC to lock up at 40 mph for a 3.73 gears,
allow 2nd to lock the tcc at 28 mph for 3.73 gears.
4th , mph not affected,(abot 50 mph tcc lock up)
But the TCC will not unlock, will hold untill down shift , ( very harsh shift ) thats why you need to manually shift,,,
Note all all your speeds will be about 10 per cent higher, with the 3.56
( there are posts on the resister. ).....




for the 3-4 gear shift, need a switch in one of the 3 shift control lines,
that go to the trans,leave in 4th, open switch and it will downshift to 3, close for upshift.

I will have to look in my manuel to find which wire it is, will get back to you,
Note: if you forget and leave in 4th lock out ( 3rd gear, sw open )
and restart engine, a code sets that makes a harsh shift,,,

I was working on a 2-3-4 shift box, with a lock out relay, to prevent
the code problem but sold the truck.

If you have a code reader, setting code is not a problem as a code clear resets it.


will get back with more info..