Disco 3/4 Automatic Transmission FAQ - 6 Speed

I brought the kit from Rimmer Bros in U.K. It was their easy fit kit which shows as Britpart however mine came with German part numbers stamped in sump and filter. My Mechanic thought they were genuine. Included was sump, filter, bolts and gasket. Currently listed at 72quid. Shipping was cheap. I got engine service done - all fluids and filters, front diff oil changed, new filter kit fitted using Lifeguard oil. Total of tab was $930 not including purchase price of tranny sump/filter kit. The only error he made was not to reset auto computer. He thought oil that came out of tranny was perfect and no different from new. There is 65k on car. But auto knew better, and sensed the change, so defaulted to neutral. Which was interesting:o solution was to re start car, go back, re set computer so it can re learn the new oil etc. Now all good. I would suggest checking with Rimmerbros if buying where Britpart get their parts from if like mine they were we think genuine ZF.

I have found ZF were the cheapest and you get the right product. I did look at one on ebay for the same price as the ZF product but it did not have a drain hole/plug so the pan would have to come off just to do a basic drain and fill.

So something to look for when you change over to a metal sump.

Garry

I've noticed lately that on steady 60 or 70 kph hills, the revs oscillate between 1200 and 1400 rpm. Is that a bad sign? Will Dr Tranny get some extra life out of the old bloke?

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Originally Posted by Stuart02

I've noticed lately that on steady 60 or 70 kph hills, the revs oscillate between 1200 and 1400 rpm. Is that a bad sign? Will Dr Tranny get some extra life out of the old bloke?

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Does it vibrate at all Stuart? Especially on light throttle up an incline.

There was a VIN specific problem around 2008 to 2010 that I learnt about on here. It caused a part to wear faster than usual and at 200 000 km's mine required a rebuild. Had the oscillation and vibration at times. Usually around 80km/h.

As title suggests, can you put a D4 (6speed) tranny into a D3?

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Originally Posted by Russrobe

Does it vibrate at all Stuart? Especially on light throttle up an incline.

There was a VIN specific problem around 2008 to 2010 that I learnt about on here. It caused a part to wear faster than usual and at 200 000 km's mine required a rebuild. Had the oscillation and vibration at times. Usually around 80km/h.

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Yeah I'm not sure what constitutes vibration but it's had a harsh resonance for a long time which everyone wants to pass off as tyre related, but I can hear/feel it varying with the revs at constant speed...
Might have to start budgeting....

Yep, at first the vibration was very mild but as we approached 7000kms of owning it, at times i'd say moderate vibration. Always through the body, never felt through the steering wheel.

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Originally Posted by Dagilmo

As title suggests, can you put a D4 (6speed) tranny into a D3?

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In essence,YES.
You need advice from those in the know.The "mechatronic" in them will need swapping out.the brain that does mechanical to electronic.
Andrew

Had my oil changed at 230,000 as the box developed a shudder, it fixed the problem. Recently I've noticed a shudder again it's now over 250,000. Where's the best place to get the Dr Tranny, it's $11 odd on eBay but shipping is about $40. Would have thought it would be more available.

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Originally Posted by Hammer H

Had my oil changed at 230,000 as the box developed a shudder, it fixed the problem. Recently I've noticed a shudder again it's now over 250,000. Where's the best place to get the Dr Tranny, it's $11 odd on eBay but shipping is about $40. Would have thought it would be more available.

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Bursons had it in stock last time i bought some