Overdrive in automatic in cold weather? - Page 3 - Fuel Economy, Hypermiling, EcoModding News and Forum

me and my metro · 05-08-2017, 10:26 PM

That diagram is a better idea!

ecocruze · 05-09-2017, 04:23 AM

Quote:

Originally Posted by me and my metro

That diagram is a better idea!

You mean Gumby's sweet drawing? I like that too lol that's what I needed to figure it out though sadly

ecocruze · 05-09-2017, 09:09 AM

Probably another dumb question but what kind of resistor (s) am I looking for. Feel silly looking for them but started looking yesterday... Really not sure what I'm supposed to pick up. Hook me up with a link if u have one ready. Haven't slept much lately so mind is kinda frazzled. Pictures help lol

me and my metro · 05-09-2017, 09:36 AM

Search ebay for this: 1/2 Watt Carbon Film Resistors, 390 ohm, 5 pieces.
The temperature coefficient varys greatly on the temp sensor so I would still add a fixed value. The sensor is also negative coefficient so you have to remove ohms not add to raise temperature. Use the drawing but add the resistor and ground the end to the switch.

ecocruze · 05-19-2017, 05:18 PM

Found the parts just need time to pick them up and need to dog around to figure how much wire I need. With Gumby's method when the switch is off it would act like normal or would differential just stay unlocked. Just not sure due to the fact my wife may have to drive it time to time. In my head this way seems it would be normal op with the switch off. Anyways one other quick question. How much slip would be worrisome when not in lockup. Torque was reading as high as 1700 rpm on acceleration.

me and my metro · 05-19-2017, 11:49 PM

1700 is a normal stall speed for a car with a small engine.
I would use this drawing since the temperature coefficient is reverse for the tranny temp sensor. You need to remove resistance not add a fixed amount to the existing value.

gumby79 · 05-20-2017, 12:43 PM

^^
Good ketch on the decrease....

ecocruze · 05-20-2017, 04:33 PM

So I don't need resistors now? Or I need them for the ground? Also need an answer to the wife driving it question lol

me and my metro · 05-20-2017, 10:13 PM

I would try a 400 ohm resistor to ground like my drawing. I would only use the switch to get lockup to work while the car is cold. As soon as the car warms up I would flip it back to normal. I would leave the switch in the normal position when another driver uses the car.

ecocruze · 05-20-2017, 10:16 PM

Perfect that's exactly what I'm looking for. I can keep it incognito. Also an anti theft device if u switch it when u park lol