Vehicle & Technical > Range Rover

Some issues

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Yoshi:
Right, me 3.9 v8 auto is struggling to change up the gears just keeps going up the revs then changes unexpectedly at about 3500rpm (on slow acceleration) and also when i take me foot off the accelerator she isnt decelerating, which obviously she should do!

Any ideas?

skucera:
With automatic transmissions it is always best to eliminate the easiest or cheapest potential causes before panicking and fixing expensive stuff.  First, check your transmission fluid level.  Low fluid level can starve the pump, which means that your shifts become delayed and soft, and the engine can really race while accelerating.  The transmission fluid also acts as a lubricant and coolant, so when it is low your clutch material on the drums wears much more quickly, and heat isn't carried away so wear doubly accelerates.  Of course, if your transmission fluid level is low, you should look for the leak.  That fluid had to go somewhere.

If the transmission fluid is at the proper level when the transmission is fully warm and in Neutral at idle, you may have a clogged transmission filter.  This should be changed every 30,000 miles, and is always the time when you change transmission fluid too.

Once you get past these two simple, cheap steps and your problem hasn't been solved, you're ready to dive into more serious diagnosis, or you're ready to take your car to a transmission shop.  This link has some useful troubleshooting steps:  http://autorepair.about.com/cs/troubleshooting/a/aa072702a_3.htm.  Myself, I like to have a general idea what the problem might be, if only so I have an idea if the solution proposed by a repair shop is the simplest or cheapest that might solve the problem.  I hate that nagging feeling that I'm helping to send a mechanic's kids through college....

Good luck.

Scott

Yoshi:
Well the box was rather empty  :oops:

Nice and full now (a little over full but that will be dealt with in time!)

Changes gear as and when it should.  Going to check for a leak when its dry so i can get underneath and see whats what :D

Yoshi:
OK, when cold its still giving me the problem of not changing gear, but it seems ok when its warmed up quite a bit :-s

skucera:
That might be a symptom of a clogged filter.  The transmission fluid gets through more easily when it is warm and thin than when it is cold and thick.  I don't know how long you've had your Rover, but if you haven't had it very long, and if you haven't changed the transmission fluid and filter yourself since you got it, you can't be sure that the previous owner changed it either.  It might be worth a change.

Scott

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