![]() | Home > Technical (L322) > 8 speed slow/slipping in reverse. |
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northernmonkeyjones Member Since: 24 Mar 2012 Location: derby Posts: 8725 ![]() ![]() ![]() |
Have you had Autos before?
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SJR Member Since: 09 Mar 2025 Location: Buckinghamshire Posts: 7 ![]() ![]() |
Thanks for the reply.
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northernmonkeyjones Member Since: 24 Mar 2012 Location: derby Posts: 8725 ![]() ![]() ![]() |
It sounds like one for a specialist. There’s probably an auto box specialist near you, who can have a look. If it’s a solenoid going on the box a whole set of ZF ones is about £300 off eBay.
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SJR Member Since: 09 Mar 2025 Location: Buckinghamshire Posts: 7 ![]() ![]() |
I’m would say I’m fairly competent with working on cars.
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northernmonkeyjones Member Since: 24 Mar 2012 Location: derby Posts: 8725 ![]() ![]() ![]() |
From memory and it’s been a while, you fill with the engine running but not in Drive, at a specific temp which I did with a laser thermometer on the sump to get a decent idea, definitely didn’t do it on stands, swapped the oil and filter on mine with the car on the ground and suspension in up. Just enough room to do it. |
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SJR Member Since: 09 Mar 2025 Location: Buckinghamshire Posts: 7 ![]() ![]() |
Thank you, I appreciate it. |
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RRPhil Member Since: 22 Aug 2011 Location: Blackburn, Lancashire Posts: 993 ![]() ![]() |
The important thing when checking the transmission fluid level is that the vehicle is horizontal. This could be on a ramp or with all four wheels on the floor over a pit. Although you have to engage the gears to fill up the hydraulic galleries to the clutches, the footbrake and parking brake must be applied so that the wheels don’t turn. The fluid level checking procedure for the 8HP70, to the point where the filler/level plug is removed, includes: • The vehicle must be on a horizontal ramp. • The parking brake must be applied. • Place the transmission control switch (TCS) knob in the N position. • Make sure that the transmission oil has exceeded a temperature of 69 degrees celsius so that the thermostat has fully opened allowing full circulation of the transmission fluid. • Allow the temperature to drop below 30 degrees. • Start the engine. • Apply, and hold, the footbrake. • Move the TCS to the 'R' position and wait for 5 seconds. • Move the TCS to the 'D' position and wait for 5 seconds. • Engage second gear and wait for 5 seconds. • Move the TCS back to the 'N' position. • Make sure that the torque converter is full of oil by holding the engine speed at 2,000 rpm for a minimum of 30 seconds. • Move the TCS to the park position and allow the engine to idle between 600rpm and 750 rpm. Phil |
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SJR Member Since: 09 Mar 2025 Location: Buckinghamshire Posts: 7 ![]() ![]() |
Thanks Phil, I really appreciated it.
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JMC Member Since: 01 Feb 2009 Location: Aberdeen-Angus Posts: 779 ![]() ![]() ![]() |
This may only 'seem' to be an issue. Mine has always taken more of a push to get it going in reverse. I also have lots of turbo wastegate 'whoosh' in reverse too. I reckon it could be a feature of the car sir! |
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SJR Member Since: 09 Mar 2025 Location: Buckinghamshire Posts: 7 ![]() ![]() |
That’s really interesting, I briefly manoeuvred the car about yesterday, and I was starting to wonder if it was designed like that for more control while off roading.
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Haylands Member Since: 04 Mar 2014 Location: East Yorkshire Posts: 8455 ![]() ![]() ![]() |
I have to reverse mine (405 but same box) up hill out the drive, not a steep hill but a hill non the less..
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SJR Member Since: 09 Mar 2025 Location: Buckinghamshire Posts: 7 ![]() ![]() |
Thank you, that is very reassuring. |
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northernmonkeyjones Member Since: 24 Mar 2012 Location: derby Posts: 8725 ![]() ![]() ![]() |
Find a steep hill and reverse up it. If it goes up it then it’s probably fine. As I said initially and the chaps above have pointed out. It does require quite a few revs in reverse.👍🏻
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