QuestionI have a 94 Discovery V8i 3.9 Automatic. When cold or if it has been standing for approximately half an hour it will not change up for approximately 2 kilometers and the when it does it does so extremely violently. When it has moved up to 4th, it seems to settle down and operate normally. I have purchased a new strainer as a starting point. Is it correct to follow this line of thought? Then how do I remove the cross member. If I recall from reading somewhere the chassis has to be jacked apart. Is there some home grown solution to this.
Thanks in anticipation of your reply.
Stephen
AnswerHi Stephen,
I'm not sure if an oil strainer is what is needed here. Have you maintained the tranny fluid; changed every 2 years? What is it's current condition?
Here's what I've found:
SYMPTOM 3 - No drive from rest with ’D’ selected
Select ’1’
(if) Vehicle drives - FAULT - No 2 freewheel
(if) No drive - Carry out main line pressure check
line pressure check:
(if) Normal pressure - FAULT - Clutch A
(if) No pressure - FAULT - Blocked filter or pump failure
(if) Low pressure - FAULT - Restricted filter or sticking primary regulator
SYMPTOM 5 - Harsh engagement ’N’ to ’D’
Check engine idle speed
Carry out main line pressure check
(if) High pressure - FAULT - Primary regulator stuck
(if) Normal pressure - FAULT - Clutch ’A’ or damper for clutch’A’
I hope this helps,
JohnMc
NB: since you bought the oil strainer (aka: oil screen)
OIL SCREEN
Service repair no - 44.24.07
Renew
1. Site vehicle on a four post ramp [hoist].
2. Disconnect battery negative lead.
3. Raise vehicle.
4. Drain oil and refit plug with new seal.
5. Detach heat shield at front exhaust pipe to manifold.
6. Disconnect electrics from Lambda sensors.
7. Remove catalytic converter assembly.
8. Remove chassis cross-member from under gearbox.
9. Disconnect dipstick tube at oil sump. Loosen securing bolt at bell housing and move dipstick aside.
10. Remove clamps securing oil sump. Note their locations for refit and withdraw sump.
11. Remove gasket and clean gasket mating faces.
12. Remove securing screws and detach oil screen and suction pipe, taking care to retain suction pipe spacer, discard ’O’ ring seal.
13. Detach suction pipe from oil screen, discard ’O’ ring seal.
14. Clean oil screen and blow out with airline.
15. Clean suction pipe.
16. Fit new ’O’ ring seals to oil screen using light grease to aid assembly.
17. Fit oil screen and suction pipe with spacer and secure with three bolts.
18. Refit oil sump using a new gasket.
19. Connect dipstick tube to oil sump and tighten bolt at bell housing.
20. Refit chassis cross-member.
21. Refit catalytic converter assembly
22. Connect electrics to Lambda sensors.
23. Connect heat shield front pipe to manifold.
24. Connect battery.
25. Refill gearbox oil system using correct grade of oil.
See LUBRICANTS, FLUIDS AND CAPACITIES, Information, recommended Lubricants and Fluids
