My transmission shifts through the gears fine until it gets to overdrive. it will not automatically shift into overdrive, I have to manually put it into overdrive. It's a 98 Cherokee sport 4 wheel drive any comments or help would be appreciated.

 

How do you manually put it in overdrive?

 

Curious as well. Are you driving around in "3"? If so the Jeep won't shift into OD if the shifter is in that position.

 

Overdrive is 4th gear. 3rd gear is 1:1 ratio and 4th is .75:1. That's why it's called overdrive.

 

Yes I drive around in 3rd and then manually put it into 4th/ OD.

 

As in the original post, it's a 98 xj 4wd. It has a stock transfer case and stock 4.0

 

That's exactly how it's supposed to work. 1-2 maxes out in 2nd gear. 3 maxes in 3rd and D maxes in 4th (OD).

Do you have to use 1-2 to set off or does it drive from still in 3 fine?

 

So if you drive around in Drive, it doesn't shift into OD?

 

Drive is not 3. Drive is a D with a circle around it. That setting gets you all 4 gears. It won't harm the transmission to run in 3, but you'll get better fuel mileage using all 4 gears. I will say that I run quite a bit in 3 myself since I live in hilly country where 45 mph is about the max speed that's comfortable to drive because of curves and farms around every curve, but the engine responds better to power changes in 3. Once I get out on flat highways, it's 4th gear all the time.

 

3 is drive, 3rd gear in the AW4 is a 1 to 1 ratio which is drive, OD is 4th gear.

 

That's how it's supposed to work. If you want the Jeep to use all 4 gears automatically then you need to put it in D, just under neutral.

 

This thread makes me think people are teaching their 15 year old to drive an auto.P means park. D means drive. R is for when you want to go backwards. N is for when you park and want to keep your foot on the brake. What do 1-2-3-4-5--R mean on a 5 speed and when should I use them?

 

Yeah, with a little experimentation, any dumb **** should be able to figure it out.

 

He should read you sig.
"Ignorance is curable, stupid is forever"

p.s. He'll be really confused if he buys a 1997-02' Jeep TJ 32RH auto. They don't ever shift into OD.

 

This is true with the 42re and the 46rh as well, but not many ordinary drivers know that. Why pick nits?