AD4/DPO Autotransmission solenoids compatibility and more - Renault Forums :: Independent Renault forum

Transmissions Transmissions...

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 20th October 2009 Thread Starter
Member
 
Join Date: Feb 2006
Posts: 51
Nominated 0 Times in 0 Posts
TOTW/F/M Award(s): 0
Thanks: 5
Thanked 7 Times in 7 Posts
AD4/DPO Autotransmission solenoids compatibility and more

Hello All,

I have a megane 1997, K7M motor, AD4 A/T.
It has been acting up lately with several weird symptoms, eventually traced down to an intermittent A/T control solenoid (Electro-pilots as they're named by Renault), from now on I'll call them gear selecting solenoids (GSS).

The problem is that this solenoid comes as part of a harness including 4 GSS's, 1 pressure modulating valve (PMV), and a temp sensor, all amounting to big $$$$$ (to be specific, over 1000 including work...).

To avoid the hefty cost my gear specialist installed a GSS from a DPO A/T (also called AL4 in Peugeot-Citroen). They look physically the same, but the DPO solenoids can be bought in single units much cheaper (1/16 the cost!) and soldered into the old harness (the DPO harness is modular and has connectors for each, as opposed to AD4 which is one-piece).

I've measured and compared resistance readings of both GSS's (DPO snd AD4) and they seem very similar also electrically (30ohms AD4 vs 40ohms DPO), and moreover, the new DPO solenoid works just fine in my AD4. On the other hand, I've read in various places that not all solenoids from both A/T systems are compatible, e.g. the PMV's are not, because they are designed for different pulse widths. I've even found that even **within the DPO line** there was a change of pressure modulating valves during production life, that requires ECU reprogramming for the newer units if installed. *copy righted material removed

Analysing the doc, it seems that they're talking about two PSV's (one for A/T system pressure control and the other for torque converted locking mechanism not present in AD4) and not the gear selecting ones. As far as I could understand, the PRV's are pulse-width-modulated by the A/T ECU at high speed to to regulate the required A/T pressure based on the external pressure sensor output, hence must act very fast. On the other hand, the GSS's change only at gear shifts and are otherwise static.

Has anyone tried and can confirm that DPO GSS's are indeed compatible with AD4 in the long run?
Attached Thumbnails
Click image for larger version

Name:	DPO SHIFT SOLENOID.jpg
Views:	269
Size:	12.1 KB
ID:	8509   Click image for larger version

Name:	DPO PWM SOLENOID.jpg
Views:	298
Size:	9.2 KB
ID:	8510  

Last edited by Devils Laguna; 20th October 2009 at 02:30 PM.
Tinkerman is offline  
  5 Lastest Threads by Tinkerman
Thread Forum Last Poster Replies Views Last Post
2003 clio2 1.2L sequential (robotic) gearbox... Transmissions Tinkerman 0 1027 20th June 2013 08:42 AM
Differences between Renault CAN CLIP s/w versions Tools & equipment Tinkerman 0 1159 12th December 2012 06:22 AM
weird Renault CAN clip diagnostic trouble code Tools & equipment Ice Barrell 2 3252 12th December 2012 06:14 AM
Reading 1997 Megane A/T diagnostic codes WITHOUT... Tools & equipment Tinkerman 13 10877 20th October 2012 10:53 AM
Why are those damn A/T solenoids burning up??? Transmissions Tinkerman 1 1484 10th October 2012 09:11 AM
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 20th October 2009 Thread Starter
Member
Threadstarter
 
Join Date: Feb 2006
Posts: 51
Nominated 0 Times in 0 Posts
TOTW/F/M Award(s): 0
Thanks: 5
Thanked 7 Times in 7 Posts
LOL, I see that I have used three different acronyms for the same thing...
PMV = Pressure modulating valve
PSV = Pressure stabilizing valve
PRV = Pressure regulating valve

They actually all mean the same thing...see pic named "DPO PWM SOLENOID".

And to our dear moderator: I've included in my above post a link to a pdf doc on a commercial website with the DPO/AL4 blowout of parts pictures and names, with the relevant comment about the compatibility issue and necessity of ECU programming, as well as attached the doc to my post. Both were deleted from the post. I now understand that attaching a commercial doc might constitute a copyright issue, but are links to external websites also prohibited here? Can I at least quote the remark about the compatibility issue?
Thanks.
Tinkerman is offline  
post #3 of 4 (permalink) Old 20th October 2009
Pat.w
Guest
 
Posts: n/a
You should be OK to partially quote and link the site as it's in context of the thread

If we have a big issue, we'll take it out.
Thanks for asking
post #4 of 4 (permalink) Old 20th October 2009 Thread Starter
Member
Threadstarter
 
Join Date: Feb 2006
Posts: 51
Nominated 0 Times in 0 Posts
TOTW/F/M Award(s): 0
Thanks: 5
Thanked 7 Times in 7 Posts
Quote:
Originally Posted by Pat.w View Post
You should be OK to partially quote and link the site as it's in context of the thread

If we have a big issue, we'll take it out.
Thanks for asking
OK, here goes...:
http://www.automaticchoice.com/Catalogue/dp0.pdf

notice the big red remark at the end of the doc (I tried but the doc doesn't allow copy and paste...so I'll attach a screen capture).
We're talking about the EPC and Lockup solenoids (parts 700G and 701G respectively). The GSS's are parts 702G.

also, note the AD4 blowout here:
http://www.automaticchoice.com/Catalogue/ad4.pdf

here we're talking about part 703G (solenoid set).
I'll attach a pic of that too here. Each solenoid in the pack is permanently attached to heat resistant (teflon coated?) wires and soldered to the sealed connector exiting the A/T case.
Attached Thumbnails
Click image for larger version

Name:	DPO solenoid compatibility issue.jpg
Views:	270
Size:	31.3 KB
ID:	8512   Click image for larger version

Name:	AD4 SOLENOID PACK.jpg
Views:	357
Size:	12.5 KB
ID:	8513  
Tinkerman is offline  
Reply

Tags
ad4 dpo al4 solenoids , ad4 or dpo , autotransmission , compatibility , solenoids

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Renault Forums :: Independent Renault forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome