B4 Solenoid
 

The B4 Solenoid is a fiddle to do but not difficult Volvo sell the repair kit (they call it a piston repair kit Rufe on here can help Doves if your desperate) its not expensive about £15 I think.
I used to have several V70 P2 in my business we had the flaring between 2/3rd changes on 3 of them as a precaution we changed the B4 cover on all 6 I also got into the habit of flushing the ATF every 50k after reading up on the American Forums (year was 2002).
You will need room to work under the car so up on stands or ramps. Take off the under tray M10 bolts if I remember.
At the rear of the transmission angled down you will see a large (about 60mm dia) cap with a raised cross on it, this is held in by an internal circlip. Remove the circlip access is tight but you can reach. With a large pair of grips rotate the cap using the raised cross the spring pressure will push it out, have some rag ready there will be a dribble of oil if the piston comes out push it back in.
Inside the cap you will see a hardened washer if this is loose or has come away that is your problem.
Use transmission fluid to lubricate the "O" rings on the new cap and push it in fit the new circlip, clean the area run the engine and check for leaks. Replace the under tray job done. Myself and one of my engineers became pretty quick after the first couple.
Finally Flush the Transmission then go to Doves to have the fluid counter reset and software upgraded. My understanding is you should only need Adaption if you have had major surgery on the gearbox.

When I sold the business I kept 2 of the cars and one of the engineers took one to be his personal car he is now over 250k and pulls a caravan?
So with good maintenance these boxes are tough.

Have you had the codes checked to make sure you don't have other issues?? You are not far away and I have a reader if you don't?

Just read the codes myself, there seem to be 2 p codes from the transmission module;

P0705 - Transmission Range Sensor A Circuit (PRNDL Input)
P0810 - Clutch Position Control Error

Also, when I scanned the Volvo specific code I also got these two;

0039 - Gear Shift Position Sensor Faulty Signal
012A - Neutral Check Faulty Connection

(are these the same issues reported differently by the reader??)

Any hints on these issues? Are they related to the shifting problem.

Also would like to know how/if I can reset the adaption, and the emmisions warning light on the dash with the reader (EU702)

Thanks

Gearbox
 

The EU 702 has a page which reads something like
Read Codes
Store Codes
Erase Codes
Just scroll down to the erase codes and press OK light out. Remember if you haven't repaired the fault it will come back.

Regarding the Volvo specific codes they indicate poor connections, have you tried unplugging the main transmission harness on top of the box and cleaning the plug and socket with electrical contact cleaner?
The see if it improves things.

With the EU 702 you can store codes in the reader for reference later

0039 indicates a fault with the PNP switch on top of the gearbox

012A could be one of the following:

Shift solenoid S1 has jammed in the OFF position
-Shift solenoid S2 has jammed in the ON position
-Solenoid SLT has jammed in the OFF position
-Internal fault in the gearbox
-Defective control module.

It is to do with the automatic neutral selection when halted for a while.

I think you need to investigate the connections to the PNP switch and possibly replace it.
For the second fault I'd start with getting the software updated to get rid of the neutral function, this may well get rid of the problem.

thanks, I cleaned the four connectors in front of the air box, front right of the engine compartment above the tranny (cables run back to the tranny), which seemed to help - although lost the orange rubber seals, which disintegrated on two of them, causing greif in reconnecting the connectors.)

Can you be more specific which one is the PNP switch? I have concerns about one of the contacts - looks a bit suspect.

Thx

Here's a link for the 850, yours will be similar.

http://volvospeed.com/Repair/pnpswitch.php

Keep this car or sell it
 

My 2001 2.4T, 137K mint condition, wife drives it displayed this message:

Trans service required

my equus obd reader said: P1619 Fault...AW 50-52...

So I took ti to jiffy and for $120 they flushed the trans, torque converter and put new oil.

Reset the obd and the car runs ok but it still kicks on downshift and gear engages and slips at the light.

So..I called a used volvo place and the part number is:
Transmission Part No : 9480902

Now the KICKER.
The seller says:

I give lifetime replacement warranties on most of my inventory.
However, this particular transmission comes with a 90-day parts warranty and sells for $1175.

So that means that this transmission is defective even I get a repalacement one.

So what is my best plan.

Best
Ashok
Valley Forge, PA

Volvo V70 2.4T 2000 Transmission 55-50SN
 

Got a 2000 V70 2.4T with none geartronic automatic code 55-50SN and serial starting 99J with a strange issue. Vehicle drove fine with no issues up until battery flattening (not completely flat but wouldn't start car). Jumped off another vehicle and car started and was given a good run and battery gained charge and no issues. Car not driven for rest of day but then next day autbox now clonking into drive on occasions and is rough changing. I've taken vehicle to trusted transmission specialist who tested car for a while and believe the valve body requires replacement. A Volvo specialist then had a look and came to the same conclusion.

Problem is the car is intermittent with the problem and at times drives fine, but then can rough change, and very occasionally can lose drive altogether for short period. Been reading about the B4 Servo cover but are these affected and if so how do I go about examination.

Hi Sidmon,

The box is controlled by one of the electronic 'brains'. This could have been confused by the low battery problem. It is worth resetting this and getting it to re-learn. I understand it can take 4 or 5 days to re-learn?

To reset this either means a visit to the local dealers or alternatively disconnect the battery for around 24 hours. Remember to use Volvos method of re-connecting the battery. See atachment.

It’s worth a try. Cheaper than letting the spannermen loose....

Bob

4t65ev
 

Hi there,
Would you have any idea about the above Auto box.? Starts off brill when cold, then when hot goes into "Limp mode", sets off in third, won't change up to 4th, Turn engine off, then restart works ok for 5 mins then back to limp.
Has selenoid "A"performance stuck off, performance on code reader.
Any help appreciated.
cheers,
joe.