I swapped out transfer cases and now IM having some issues. I drive it home and it drove fine other than the speedo not working. Two days later I go to drive it and it won't shift out of 1st, it's idling high, and the exhaust stinks kinda like rotten eggs. I kinda figured the speed sensor don't have anything to do with the shifting or exhaust or idle. Maybe the tps for the shifting issue? It's only a couple years old but I have hood vents with no drop pans. But what about the high idle and exhaust fumes?

 

Year ?

 

2000

 

Codes?

 

Electroinc speedo needs to be working most likely the issue computers not getting signal .

 

It just threw a code. Don't have a scanner on me. Might get one a little later.

 

Auto parts store do it free nowadays

 

Can't get it there though. My step dad has one I can borrow

 

That sensor on the t case can be turned 4 possible ways. Thats likely your issue. As for the engine light you will have a code for speed sensor for sure. Now let me say this about your exhaust. You have 2 pre cats most likely because you have a 2000 xj. Then there is one main cat after the front pipe. If you get a code for "catalyst efficiency below threshold" something is up with the cats.

 

Got the Speedo working. Didn't fix idle or shifting. Gonna go grab the scanner.

 

Read code clear it drive for 15 minutes or so let ecm relarn see what happens ..

 

Ok glad you figured out the speedo. Yea man i would check the cats for sure. If you can hear chunks rattling around something is wrong. Also what t case did you take out and what did you replace it with? How was the jeep shifting before the t case swap?

 

Did you disconnect any O2 sensors?

I know the wiring is in that area..

 

X2 on o2 sensors. You should have 4 because of CA emissions and precats

 

I'm kinda curios if the lower O2's were messed with. Wish this guy would post back.