I Just put a new coil pack into my 2000 disco 2; including removal of the upper intake manifold. I put it all back together and the engine runs better than ever. The only problem is it wont shift in to fourth gear anymore?? All the other gears shift smoothly even the kick down works but no fourth gear. Anyone have any ideas or answers?

 

Were it a D1, it won'rt shift to overdrive until tranny temp gets to about 150. D2 does not say this, but does have electronic switched shifting. And it's own ECU. Bad connection? Certainly does not seem related to other work.

 

Does the indicator on the dash say you are in D? If it thinks you are in 3, you'll never make it into 4. Also, I've heard if weirdness shifting into 4th with MAF problems, but they were usually hard shifting. Wouldn't hurt to make sure the MAF is connected well.

 

I thought about this and found this tidbit for you in the RAVE:

Mechanical limp home

In the mechanical limp home mode, gear engagement is controlled by the manual valve. The gearbox is fixed in 4th
gear if the fault occurs while the vehicle is moving, or 3rd gear if the fault occurs while the vehicle is stationary. 3rd
gear is also engaged if a vehicle is brought to a stop and the selector lever is moved out of, and back into, D. Neutral

and reverse gear are also available.

So maybe you somehow caused limp home mode to happen, while truck was parked and other work going on.....

 

if it is limp mode your S and M lights will be flashing. but you wouldnt have first or second either.

 

Is your service engine light on, have you checked your fluid level, how many miles on the truck and when was the tranny last serviced?

 

Disco II transmission behaves this way as well. I know mine is remiss to go into 4th on those cold winter mornings when I head out to the goose fields. After a few miles, it acts fine. Looking briefly at the RAVE, the temp sensor of the transmission appears to be a silver cylinder mounted vertically on the drivers side of the radiator. It does not appear to describe any issues or problems to resolve regarding such symptoms.

 

I believe that is the high temp sensor, which lights the warning light. Biut the performance could be engineered in by the valves in the valve body of the tranny.

 

yes it is a high temp sensor. and that will set off the trany oil temp light on the dash

 

However, even if this is all correct, shouldn't the truck have reached that temp fairly soon?