D3 TDV6 torque converter problem

In order to buy a few people some time , I have in the past added 2x tubes of Dr Tranny to existing fluid , got them to drive it for a week, then flushed fluid till clear , drop old pan, fit new pan and filter , refill and add one tube of Dr tranny ..... none have had an issue since. first one around three years ago , last one 6 months ago.

I've also tested Penrite BMV on my own recently acquired RR with very good results so far , won't be passing judgement for a while yet though.

with the Dr Tranny , it usually sorts out the shudder / de-glazes the tcc by the time you've driven round the block

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Originally Posted by PerthDisco

Interested to know what was the gearbox service history prior to 225,000km and was the car used for towing? (Assuming you have owned the car for majority of its life).

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Only owned the car for the last 2 years. There was one tranny oil change prior to mine (not sure at what km). I bought it of dealer so no details on towing. I asume yes

I had same rumble / shudder / vibration at the described scenario. One thing my mechanic asked me which immediately confirmed for him that it was the TC is the rev needle. Occasionally it fluttered (flicked up and down ever so slightly), from memory somewhere between 1200 - 1800 rpms. The unusual aspect to this is that the drive instruction was constant, ie regular acceleration, or coast. No rev change which could make the needle move up and down a few times before it made its mind up what to do.

If you see this (you'll know it when it happens) then absolutely it's the TC.

[/Quote] this "noise" and vibration that comes in at around 50 - 70 kmh and it noticeable as you just back off a little on throttle or slightly apply throttle.

It almost sounds like a "brrttttttttt" sort of noise, and apprears to resonate through the drive train causing a vibration to be felt.

Very apparant when cold.[/QUOTE]

Sounds a lot like the Torque converter, however note that the valve body in the bottom of the transmission may also be in need of a clean out. If lifting off and reapplyibf throttle, the transmission may be wanting to change gear. If the solenoids are dirty and the valve galleries blocked, it won't/can't select a gear easily. Also, worn clutch piston valve (also in the body) or worn accumulator at the end of each valve train could be adding to the problem.

Especially when cold, as the fluid viscosity is higher, exaggerating the issue even more. A fluid flush may not get rid of all the crud in the VB, especially around the solenoids and valve pistons.

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Originally Posted by smrkolj.sebastjan@gmail.com

Only owned the car for the last 2 years. There was one tranny oil change prior to mine (not sure at what km). I bought it of dealer so no details on towing. I asume yes

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Sounds like the Dr Tranny approach well worth a try.

I’d love to know if @cripesalmighty D3 with 527,000km is still on original box?

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Originally Posted by Ozzy119

I had same rumble / shudder / vibration at the described scenario. One thing my mechanic asked me which immediately confirmed for him that it was the TC is the rev needle. Occasionally it fluttered (flicked up and down ever so slightly), from memory somewhere between 1200 - 1800 rpms. The unusual aspect to this is that the drive instruction was constant, ie regular acceleration, or coast. No rev change which could make the needle move up and down a few times before it made its mind up what to do.

If you see this (you'll know it when it happens) then absolutely it's the TC.

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Cruising at 90 kph on the flat no acceleration I get the shudder. Go into manual mode, drop down a gear, all good. Might make the TC last a bit longer by doing this.

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Originally Posted by discorevy

In order to buy a few people some time , I have in the past added 2x tubes of Dr Tranny to existing fluid , got them to drive it for a week, then flushed fluid till clear , drop old pan, fit new pan and filter , refill and add one tube of Dr tranny ..... none have had an issue since. first one around three years ago , last one 6 months ago.

I've also tested Penrite BMV on my own recently acquired RR with very good results so far , won't be passing judgement for a while yet though.

with the Dr Tranny , it usually sorts out the shudder / de-glazes the tcc by the time you've driven round the block

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FYI,
I have had Penrite BMV in my MY13 Disco for just over 10,000 klms now and no probs whatsoever.
Did a complete flush.

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Originally Posted by Ozzy119

I had same rumble / shudder / vibration at the described scenario. One thing my mechanic asked me which immediately confirmed for him that it was the TC is the rev needle. Occasionally it fluttered (flicked up and down ever so slightly), from memory somewhere between 1200 - 1800 rpms. The unusual aspect to this is that the drive instruction was constant, ie regular acceleration, or coast. No rev change which could make the needle move up and down a few times before it made its mind up what to do.

If you see this (you'll know it when it happens) then absolutely it's the TC.

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Tested last night and it did exactly what you described. The rev needle started fluttering at 1500 rpm.

I wonder if the shuddering/erratic rpm throws up a fault code, and if so which one/s?

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Originally Posted by RANDLOVER

I wonder if the shuddering/erratic rpm throws up a fault code, and if so which one/s?

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No fault codes for me.