722.5 5-speed conversion
Thread Starter
Super Member
Joined: Oct 2008
Posts: 837
Likes: 25
From: seattle
1990 300ce supercharged and intercooled
722.5 5-speed conversion
Was wondering if anybody over hear might be interested.
Just to head off the question. It is not plug and play. I just found out that when the factory tcu is unplugged the rest of engine management does not care to much. I think this will be able to retrofitted to any 722.6 car with old style shifter and maybe the new shifter in the future.
Well I am getting really close to having this be 100%. I have dialed in most of the shift points and am not having any major problems. I just talked to PCS and when time is permitting they are going to get the speed sensors set up. This will basically make the thing work flawlessly. Right now I am not having any problems but there is always the potential without gear recognition. With gear recognition it will operate with almost the same premise that Mercedes does as far as completing gear changes and limp modes.
I am using the small nag transmission with no power holding problems due to the shift firmness under load. And with a 3.27 rear end I run at 2200 rpm at 60 mph in 5th gear.
Just to head off the question. It is not plug and play. I just found out that when the factory tcu is unplugged the rest of engine management does not care to much. I think this will be able to retrofitted to any 722.6 car with old style shifter and maybe the new shifter in the future.
Well I am getting really close to having this be 100%. I have dialed in most of the shift points and am not having any major problems. I just talked to PCS and when time is permitting they are going to get the speed sensors set up. This will basically make the thing work flawlessly. Right now I am not having any problems but there is always the potential without gear recognition. With gear recognition it will operate with almost the same premise that Mercedes does as far as completing gear changes and limp modes.
I am using the small nag transmission with no power holding problems due to the shift firmness under load. And with a 3.27 rear end I run at 2200 rpm at 60 mph in 5th gear.
Last edited by whipplem104; Nov 17, 2008 at 11:25 PM. Reason: incorrect
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From: Portsmouth, NH
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Do you have a whipple charger in the 300? I ask as your name may suggest one
It could be me but I find your post hard to make out. Are you swapping trans A with trans B when the car originally ran trans A?
It could be me but I find your post hard to make out. Are you swapping trans A with trans B when the car originally ran trans A?
Thread Starter
Super Member
Joined: Oct 2008
Posts: 837
Likes: 25
From: seattle
1990 300ce supercharged and intercooled
Yes I have a whipple on the car. I there is a thread on the 124 section.
I swapped the 722.3 4 speed transmission for the 722.6 5 speed.
The tcu has complete control over all shift points and firmness and can operate with paddle shifters etc.. It basically gives full stand alone control of the 722.6.
I swapped the 722.3 4 speed transmission for the 722.6 5 speed.
The tcu has complete control over all shift points and firmness and can operate with paddle shifters etc.. It basically gives full stand alone control of the 722.6.
MBWorld Fanatic!
Joined: Feb 2004
Posts: 1,559
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From: Portsmouth, NH
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Thats awesome! Curious as to how this turns out.
I'm going to post a link to your other post with the whipple kit and pictures. There are a few who lurk in this forum that may find it pretty interesting.
I'm going to post a link to your other post with the whipple kit and pictures. There are a few who lurk in this forum that may find it pretty interesting.
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Joined: Apr 2012
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W124 BRABUS 3.6-24
722.6
Hi there.
What car model did you use the 722.6 from ?
Are you using the 722.6 original TCU or did you dó something Else and if, what did you use ?
I am looping to do the same conversion to my w124 300E-24 (M104.980) engine. I already have the 5 speed 722.5 but This is the same tranny A's the 722.3 just with an elektronik contoled 5th gear.
So i World like to use the 722.6 to ADD padle shifters to it.
Did you get yours to work. ?
What car model did you use the 722.6 from ?
Are you using the 722.6 original TCU or did you dó something Else and if, what did you use ?
I am looping to do the same conversion to my w124 300E-24 (M104.980) engine. I already have the 5 speed 722.5 but This is the same tranny A's the 722.3 just with an elektronik contoled 5th gear.
So i World like to use the 722.6 to ADD padle shifters to it.
Did you get yours to work. ?
