RR P38 auto no drive

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M

mrelectric

New Member
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Hello to all, Just joined here. I got an old 1996 P38 2.5 dse RR.Auto
Got problem now, was driving along and lost all drive from auto box. its a ZF4HP22 gear box. checked it again this morning and drive was back but gone again when engine warm. Anyone got any ideas please??.
regards to all members.
Malc :mad::mad::mad:
 
oil colour like new, nice pink colour and not burnt, got drive from cold but no drive forward or back when engine warm. looking at service history the oil was changed 9,000 miles ago
 
On the L322, no drive when warm indicates failure of an O ring or two I believe....

as the oil warms up and gets thinner, it finds its way through some minute sealing gaps reducing hydraulic pressure available to hold the drive clutchs and brakes in place loosing all drive!
 
Saint.V8 said:
On the L322, no drive when warm indicates failure of an O ring or two I believe....

as the oil warms up and gets thinner, it finds its way through some minute sealing gaps reducing hydraulic pressure available to hold the drive clutchs and brakes in place loosing all drive!
Click to expand...
But it's a P38 Ant:)
 
try seytting off in 1 when it wont go in d ,if no different youd need to check oil pressure ,and o rings on filter under valve block ,oil will look red on dipstick you would need to drain some out
 
yes oil level correct, think i'll remove sump and check filter not bunged up. cant understand why it just decided to lose drive, its the ZF 4HP22 box
 
its o-rings on filter to block and pick up pipe that may be an issue if filters bunged youve more serious thing to worry about ,how did you check level engine running box in neutral?
 
jamesmartin said:
its o-rings on filter to block and pick up pipe that may be an issue if filters bunged youve more serious thing to worry about ,how did you check level engine running box in neutral?
Click to expand...

I done it as per RR manual from cold going through gears and back to park
 
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