When you hit the "OD" button, which gears are lock

LibertyCRD · **Posted:** Wed Oct 19, 2005 3:13 pm

Guys... I have the 545RFE 5-speed automatic tranny in my CRD. It has two overdrives. 4th gear is .78:1 and 5th gear is .67:1 I think. My question is...when I turn overdrive off by hitting the button on the shifter, does it lock out both overdrives? Or just 5th? Anybody know??

Bonehead · **Posted:** Wed Oct 19, 2005 3:32 pm

Yea it locks out both overdrives. you are in 3rd(which is 1:1) when button is depressed.

ShadE · **Posted:** Thu Oct 20, 2005 1:52 am

I was told by my dealer that it also changes the shifting points for higher rpms between shifting. is this true?

MikeD0106 · **Posted:** Thu Oct 20, 2005 4:51 am

I'm gonna say sure even though I don't know this for a fact. I only know that when I drive with my OD off that my shift points are way high. Comes in handy when I need to take off quickly from a light.

LibertyCRD · **Posted:** Thu Oct 20, 2005 7:57 am

OK thanks for the responses. You are right, it does lock out both overdrives. I used a RPM calculator and did a test drive, and yup...sure enough when you turn OD off it goes straight to the 1:1 gear (which is 3rd on this tranny). Thanks for the help!!

OH...and yeah on my Dodge Ram the computer would alter the shift pattern with OD off, so I assume the Jeep does the same thing. Though it's hard to say.

Jeepjeepster · **Posted:** Thu Oct 20, 2005 5:40 pm

on the 04 tranny which only has 4 gears, the only thing i can tell it does is hold the shift points to a higher rpm and lock the torque in 3rd at a lower rpm to keep the tranny cooler, kind of sucks too when ur starting from a stop.

When you hit the "OD" button, which gears are lock

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