P38 diesel transmission or rev fault

Mikep38 diesel said:

Hello
I have the p38 2.5 diesel auto.
I have an issue I think with the transmission. It seems to over rev and I have to really rev it to even pull away
and is totally gutless as though it's a 900cc and drinks fuel like a shark. Its has had the gearbox oil and filter changed but is still the same. I'm not mechanic minded whatsoever but wonder if it's the maf air flow meter at fault? Or any other likely suspect
Thank you so much for any suggestions to eliminate this

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Mikep38 diesel said:

Hello
I have the p38 2.5 diesel auto.
I have an issue I think with the transmission. It seems to over rev and I have to really rev it to even pull away
and is totally gutless as though it's a 900cc and drinks fuel like a shark. Its has had the gearbox oil and filter changed but is still the same. I'm not mechanic minded whatsoever but wonder if it's the maf air flow meter at fault? Or any other likely suspect
Thank you so much for any suggestions to eliminate this

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Mark Piercy said:

Was the gearbox refilled while it was running?
It should have been

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Mikep38 diesel said:

I don't know. The previous owner changed it apparently. Is there a gearbox dip stick somewhere to check the level?

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Mark Piercy said:

Depends on the year, the early 38's had a dipstick and the later have just a level plug on the front of the gearbox oil pan.

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Mark Piercy said:

Depends on the year, the early 38's had a dipstick and the later have just a level plug on the front of the gearbox oil pan.

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Mikep38 diesel said:

I just checked and it is year 30/03/99. It's been this way since I had it and it's currently sorn but I want to drive it again and get it sorted when I get back to UK on 23/03/23. The previous owner spent quite a bit on parts however he was mechanical minded but not electrical

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Mark Piercy said:

Was the gearbox refilled while it was running?
It should have been

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Datatek said:

As above, gearbox must be filled when cold with the engine idling and must be run through all gears.

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Mikep38 diesel said:

Thank you. I will try both the maf sensor and gearbox fluid. Anyone know what colour or brand fluid a 99 2.5 auto diesel needs? Thanks

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Rubberknees said:

ATF Dexron 3 as stated in Rave. Has as previously been said follow correct filling instructions

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Mark Piercy said:

Engine running, foot on brake, into reverse and hold for a few seconds and then proceed through the rest of the gear lever positions and back towards park in the same fashion. Leave it running and recheck gearbox oil level.
You should have next to nothing coming from the level plug.
Refit plug and stop the engine

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Mikep38 diesel said:

Thank you mate. I'll get some of this. When they say fill when running and run through all gears does this mean drive it after filling or stationary parked with foot on brake selecting 1,2,3 and reverse while stationary and running to lubricate the gears?

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