uksniper1 Posted October 7, 2009 Share Posted October 7, 2009 hi,just a query realy,i have a 3.9 auto v8 rrc,we have just had 2 days of freezing frosty mornings,and ive notice i get a slight auto box slip for the first 3 or 4 mins after driving,goes back to normal after a couple a mins,,only does it first thing in the morning when we have the frost,,any one else get this?. Quote Link to comment Share on other sites More sharing options...
jonket Posted October 7, 2009 Share Posted October 7, 2009 I have a 3.9L RRC '90 with ZF transmission. I have been told that I should take care of exchanging the transmission filter and fluid. If I don't the transmission will start to slip and that would be the end of the transmission. This could be a sign to change the filter since it slips cold but okay hot. Quote Link to comment Share on other sites More sharing options...
Stopover Posted October 8, 2009 Share Posted October 8, 2009 hi,just a query realy,i have a 3.9 auto v8 rrc,we have just had 2 days of freezing frosty mornings,and ive notice i get a slight auto box slip for the first 3 or 4 mins after driving,goes back to normal after a couple a mins,,only does it first thing in the morning when we have the frost,,any one else get this?. First thing to do is get a new autobox filter kit, fit it and new dexion II might do the trick? Quote Link to comment Share on other sites More sharing options...
uksniper1 Posted October 8, 2009 Author Share Posted October 8, 2009 ok cheers guys,will get a filter an change the trans fluid too,, Quote Link to comment Share on other sites More sharing options...
bishbosh Posted October 8, 2009 Share Posted October 8, 2009 Wait for it!! Have a read of THIS and then decide if you want to risk an oil change on a high mileage box (my assumption!). I changed the oil once on my auto and afterwards it stuck in first for a mile! Fortunately it sorted itself out after a few weeks but I think I was lucky. Give Ashcrofts a call and get some advice from them. Quote Link to comment Share on other sites More sharing options...
jonket Posted October 8, 2009 Share Posted October 8, 2009 Interesting reading these 2 Q&A at Ashcroft transmissions. 1. When I start my Automatic Range Rover in the mornings it takes a while to engage drive, it hasn�t always done this. This has become worse in the cold weather. Why? It sounds like you need to change the filter! In the cold weather, i.e when the oil is cold and more viscous, if the filter is partially blocked it will take some time for the pump to draw oil through it. Once the oil becomes warm it flows more freely and can pass through the filter more easily. Hence the problem only occurs when the oil is cold. To remedy this problem your filter needs to be changed. This should be done sooner rather later to reduce the possibility of damage to the autobox, by the clutches �slipping� during this slow engagement. 2. I have a 4 speed ZF Auto and it sticks in first gear in the morning or when cold and is reluctant to change up from 1st gear. Once the gearbox has warmed up it shifts normally. Why? The governor valve is sticking, which can be caused by contamination. i.e. clutch plates or other parts disintegrating. The fine debris finds its way past the filter and tends to accumulate in the governor, causing it to stick. A temporary solution is to remove and clean the governor. The problem will often recur as debris from damaged parts continues to build up in the governor. If the problem continues after cleaning the governor then it may be necessary it replace your Autobox. We have noticed many customers reporting this fault starting a few days after an oil and filter change and after researching this using our experience and the expertise of others in the trade we have come to the conclusion that as ATF oil is a detergent type oil, when the oil is changed this will dislodge and stir up settled debris in the autobox which in turn jams the governor valve. In light of this although it sounds controversial it is debateable if changing the oil and filter is a good idea, some say if the box it going to fail it will fail if the oil is good or bad and their advice is leave it alone. I am still undecided but the truth is I get a lot of calls from customers thinking they are looking after the autobox by servicing it and a few days later this fault occurs. So, it seems to be true in a way, that if it starts slipping, it is the end of the transmission. But is it not worth the try to exchange the filter and fluid? If it does not work, that is the end of it. Quote Link to comment Share on other sites More sharing options...
uksniper1 Posted October 9, 2009 Author Share Posted October 9, 2009 Wait for it!! Have a read of THIS and then decide if you want to risk an oil change on a high mileage box (my assumption!). I changed the oil once on my auto and afterwards it stuck in first for a mile! Fortunately it sorted itself out after a few weeks but I think I was lucky. Give Ashcrofts a call and get some advice from them. hi,thanks for that mate,i have heard some where before ,probly on here actualy that some owners have had problems after a filter change in the rr gearbox,,i might just swap out the oil and leave the filter alone to be honest. Quote Link to comment Share on other sites More sharing options...
bishbosh Posted October 9, 2009 Share Posted October 9, 2009 You are missing the point - it is the new oil that is the problem as it has detergent properties and dislodges all the gunk that has accumulated over the years in the box and deposits it nicely in your clutch packs and valves. I would strongly advise you ask AShcrofts' advice before you do anything at all. Quote Link to comment Share on other sites More sharing options...
uksniper1 Posted October 9, 2009 Author Share Posted October 9, 2009 You are missing the point - it is the new oil that is the problem as it has detergent properties and dislodges all the gunk that has accumulated over the years in the box and deposits it nicely in your clutch packs and valves. I would strongly advise you ask AShcrofts' advice before you do anything at all. hi,ok will give em a ring mate,cheers again,wayne. Quote Link to comment Share on other sites More sharing options...
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