Gearbox problem.

P38lad · Jan 13, 2020

Evening all, so my p38 2.5 (bmw engine) on a 96 plate, auto, keeps stalling when I put it in drive or 1st.

I've just replaced the injector pump, (need it timed) and got it running after being parked for about a year.

Ive noticed that the dash keeps flashing gearbox overheat, yet the car hasn't even moved.

I've read that the temp sensor for the gearbox is known for being faulty. Is it just a case of replacing this? Or Could anyone shed some light as to the cause why it stalls when you select a gear?

Cheers in advance Barry

RangeRoller dt · Jan 14, 2020

~~Sprag clutch failure.~~

P38lad · Jan 14, 2020

RangeRoller dt said:
Sprag clutch failure.

Expensive and/or hard job.

Datatek · Jan 14, 2020

RangeRoller dt said:
Sprag clutch failure.

Where did you get that from? No symptoms of sprag clutch failure.
If the FIP has not been timed, get that done and check the idle speed. Gearbox overheat is likely to be a duff sensor on the oil cooler.
What is the state of the battery?

RangeRoller dt · Jan 14, 2020

Thought it causes cut out when you put it in D

Datatek · Jan 14, 2020

RangeRoller dt said:
Thought it causes cut out when you put it in D

No, the torque converter is there to take the load. However if the idle speed is low of the FIP miss timed there may be a problem. The EDC should pick up the drop in revs as D is selected and compensate.
If the sprag clutch fails you can only get drive by manually selecting 1st gear.

Rubberknees · Jan 14, 2020

When gearbox overheat showed up on mine it was battery fault. Check battery first and earths

P38lad · Jan 14, 2020

Battery is a old battery, so will be changing for a new one. I'm going the to get the garage to to time the pump and I'll see what happens from there.

Cheers

RangeRoller dt · Jan 14, 2020

1000cca type 31 120aH honestly best thing I’ve bought for Mine.

Datatek · Jan 15, 2020

P38lad said:
Battery is a old battery, so will be changing for a new one. I'm going the to get the garage to to time the pump and I'll see what happens from there.

Cheers

MF31-1000 from Battery Megastore on line. NO affiliation, just a happy customer.

tomcat59alan · Jan 15, 2020

Datatek said:
MF31-1000 from Battery Megastore on line. NO affiliation, just a happy customer.

+1.

tomcat59alan · Jan 15, 2020

Datatek said:
MF31-1000 from Battery Megastore on line. NO affiliation, just a happy customer.

+1.

RangeRoller dt · Jan 15, 2020

+2
I only used search function then bought best/cheapest I could find after 3days internet searching. When I mentioned it to the lads here turned out I’d had slightly different one, more expensive and still needed trickle charging

Thankfully Brian found a voltage regulator to that sorted it and now powers everything, doesn’t demand trickle. I’ve even welded a starter together with it once and it’s fine

DanClarke · Jan 15, 2020

MF31-1000 shows as having the terminal posts centred on the short side. Not sure it will fit my 2 main cable lengths.
Would be a real bugger to get one and find the cabling is inadequate. lol

Datatek · Jan 15, 2020

DanClarke said:
MF31-1000 shows as having the terminal posts centred on the short side. Not sure it will fit my 2 main cable lengths.
Would be a real bugger to get one and find the cabling is inadequate. lol

It fits in the P38, the cables reach OK.

RangeRoller dt · Jan 15, 2020

Reach okay on mine. Is as big as you can get in there so they stretch little further.

I’d give you a pic but uploads out, may be able to see it in my avatar as box got destroyed in the roll.

DanClarke · Jan 15, 2020

Thanks @Datatek and @RangeRoller dt , looks like a good move then.
I may be getting myself one of them then.

Datatek · Jan 15, 2020

DanClarke said:
Thanks @Datatek and @RangeRoller dt , looks like a good move then.
I may be getting myself one of them then.

Got to order another one myself soon as the 2.5 year old Varta in the project car is not holding a charge

RangeRoller dt · Jan 15, 2020

Same one fits a V8 doesn’t need so much cranking.

I regard as a must for anyone with an M51 Diesel P38
I’m not anything to do with any company just saying like...

Gearbox problem.

P38lad

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RangeRoller dt

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P38lad

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Datatek

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RangeRoller dt

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