Gear box issues 2nd gear only

**Eric SDV6SE** · 27th July 2020, 07:54 AM

Originally Posted by coopers1969

Thanks for all the info I have looked on eBay for the solenoids but the genuine ones I am unsure of did you use bmw or food ZF solenoids or do you have the link where you got yours from.

As long as they are for the right ZF gearbox and genuine it shouldn't matter. BMW and others run the ZF gearbox platform in their cars as LR does.

I know that BMW run the same ZF units, so pretty safe there.

If your D4 3.0l is pre 2014, I'm guessing its the 6HP28 unit. Check under the car up on the lhs of the gearbox theres a reference plate. Note down the numbers as this identifies the gearbox.

I bought mine from a mix of places, solenoids came from a US based official ZF agent, the separator plate from my local ZF distributot etc.

Re the separator plate, pretty sure yours would be the A063 plate. They should be in stock locally so you shouldnt need to buy two and be left with one you cant sell.

**BobD** · 27th July 2020, 06:10 PM

Originally Posted by coopers1969

Also sorry it doesn’t jump to third I accelerate slowly 1st to second normal picks up second the drops reves with no change in throttle position. Then it hooks up in second and changes gear to third as per normal. It is the drop in revs in second with no throttle change that is strange. And there are no fault codes either I feel the full service with parts suggested could be the way to go. Are there any YouTube videos showing how to do it?

There is probably nothing wrong with the car. The torque converter locks up as revs rise in second gear at around 2500 and then stays locked up in all gears above that. That is normal for my D4 6 speed , my L405 8 speed and now my new D5 8 speed. You notice it more under load but that is always what happens on any take off from a standing start unless it changes to third at lower revs before the TC lockup occurs. Happens in second gear on 6 speeds and maybe second or third on the 8 speeds as it is difficult to tell what gear it uses from a normal standing start with the 8 speed and I haven't tried to work it out.

**Eric SDV6SE** · 27th July 2020, 07:02 PM

Roger that. Car can and will take off in second and tc locks up as stated, but should not drop 600rpm unless its changing gear.

A test woukd be to shift into sports mode and accelerate briskly. Should move through each gear with no clunks and hold each gear a bit longer. Remember the mechatronic is adaptive to driving styles and sometimes need an "italian tune up" to get them to wake up.

Further, "manual" shifting should also be smooth and no "thumps" up or down.

**coopers1969** · 27th July 2020, 09:41 PM

Originally Posted by Eric SDV6SE

Roger that. Car can and will take off in second and tc locks up as stated, but should not drop 600rpm unless its changing gear.

A test woukd be to shift into sports mode and accelerate briskly. Should move through each gear with no clunks and hold each gear a bit longer. Remember the mechatronic is adaptive to driving styles and sometimes need an "italian tune up" to get them to wake up.

Further, "manual" shifting should also be smooth and no "thumps" up or down.

Thanks I may be jumping at shadows just don’t want a $7000 dollar bill if the S hits the fan. Though for around 1200 dollars a gear box touch up couldn’t hurt. How are you finding the Penrite fluid for the transmission.
And there is defiantly no clunking and changes down gears nice and smooth in drive and with some authority in sport mode.

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