Paul Wootton

Well-Known Member

• Aug 25, 2024

• #1

Can anyone help with advice as to the problem with this transmission.
4litre Gems 1999.The problem started when we lost 4th gear,it then decided to not up change from 1st and reverse is still available.
We have changed the oil and had the valve block cleaned but nothing has changed,the lights on the dash show the connection to the gear shift but nothing actually happens in the box.
Anyone know what thye problen may be.
Paul

 

kermit_rr

Very

Full Member

• Aug 25, 2024

• #2

Have you checked the level with the engine running and after selecting all gears?

 

pwood999

Well-Known Member

Full Member

• Aug 25, 2024

• #3

+1 on double check the fluid level according to RAVE. Also check diagnostics.

 

Paul Wootton

Well-Known Member

• Aug 25, 2024

• #4

Levels checked as per book

 

Datatek

Well-Known Member

• Aug 25, 2024

• #5

Paul Wootton said:

Can anyone help with advice as to the problem with this transmission.
4litre Gems 1999.The problem started when we lost 4th gear,it then decided to not up change from 1st and reverse is still available.
We have changed the oil and had the valve block cleaned but nothing has changed,the lights on the dash show the connection to the gear shift but nothing actually happens in the box.
Anyone know what thye problen may be.
Paul

Click to expand...

Are you saying that the dash shows which gear is selected?

 

Paul Wootton

Well-Known Member

• Aug 26, 2024

• #6

Yes correct

 

Datatek

Well-Known Member

• Aug 26, 2024

• #7

Paul Wootton said:

Yes correct

Click to expand...

So that rules out the selector cable and the XYZ switch. You say "levels correct as per the book", is that cold with the engine idling after selecting all gears?

 

Paul Wootton

Well-Known Member

• Aug 26, 2024

• #8

Yes it is done correctly,does the dash read from the XYZ or from the lever

 

Datatek

Well-Known Member

• Aug 26, 2024

• #9

Paul Wootton said:

Yes it is done correctly,does the dash read from the XYZ or from the lever

Click to expand...

From the XYZ switch. The lever just operates the cable to the gearbox & switch.

 

Paul Wootton

Well-Known Member

• Aug 26, 2024

• #10

So it would seem to be a box fault,we have tried a new valve block and oil change,plus all the electrical components so it looks as like a box change.

 

Datatek

Well-Known Member

• Aug 26, 2024

• #11

Paul Wootton said:

So it would seem to be a box fault,we have tried a new valve block and oil change,plus all the electrical components so it looks as like a box change.

Click to expand...

I was going to suggest checking the valve block bolts are tight (thanks Henry b) but as you have changed the valve block you will have done that. @Bemble is the expert.

 

pwood999

Well-Known Member

Full Member

• Aug 27, 2024

• #12

Diagnostics might help. This should be the correct Nanocom guide for Thor.

 

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