722.4 box question

1982-1993 :180E, 190E, 190E 2.3, 190E 2.6, 190D 2.2, 190D 2.5, 190D 2.5 T
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vanir
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Model you own: w201

722.4 box question

Post by vanir » Thu 21 Jan, 2016 3:38 pm

Finally after a long wait a rebuilt 3.0 is booked for install in Feb, has flow benched head, bead blasted/balanced manifold (will add Franken-CIS from Dkubus), using 22/62 cam, upped compression, with fabbed headers hoping to get some decent power.

The box...
It's flaring in 2nd-3rd upshift and revs a lot before engaging reverse. Obviously needs a reco, which is on the books...or...

A 5spd man conversion my gut tells me is going to get complicated and expensive around here. There not that easy to find in Oz to start with, I've seen like a full kit from MB Spares once and nowhere else.
It is much simpler, and I think cheaper to get my engine guy to rebuild the auto for a couple of grand. Other than the 25km/h 1st gear downshift lockout, I like the auto. Would like to disable that low speed lockout, I need a 1st downshift at about 40 sometimes. And that's really the only reason I'd even want a manual. Slow turns merging into high speed traffic, need the lower gear, can't get it from the auto. Other than that, it's a daily, I drive in traffic, and sometimes with a coffee in my hand. Anything above 60 and the auto's fine all the way as fast as I need to go. It's just that under 40 if you pull into traffic you need 1st, but have to come to almost a complete stop to get it.

1st question, can the downshift lockout be disabled, so that it downshifts under any speed that it would WOT upshift?

2nd question, is the 722.4 a strong enough box? One 722 builder told me it's made for the 102 motor and can barely handle a stock 2.6, he says it won't handle a 3.0, which would make rebuilding it a waste of money if it has to be replaced within a couple of years.
W201.029 w/ M103.983
22/62 cam w/11mm lift
63mm exhaust
215 and 235 kumho tyres.

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Ivanerrol
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Re: 722.4 box question

Post by Ivanerrol » Thu 21 Jan, 2016 5:21 pm

The 722.4's were used right up until end of '96 and variations thereof where installed in M104 E280's and C280's

There are variations of the 722.4. Made for M102's, M103's, M111's and M104's

I have installed a 3.0 litre engine in a car which originally had a 2.6. I used the 722.4 originally supplied with the 2.6.
As long as you don't floor the accelerator all the time and do steady as you go driving a 722.4 from a 2.6 will accommodate a 3.0L

Since you are giving extra horses in your 3.0 I don't think your 722.4 will handle it.
Problem will be that a 722.3 is much bigger physically and without body mods you wont get this tranny in a W201.
Plus there's changing the torque converter, flex disk, altering the tailshaft and fiddling with the cutout switch connectors.

There a overseas kits available to get you first gear start - you will need to look in the overseas forums.
However that first gear in W124 / W126 is quite low. 40kph will be revving the engine up quite high

W202's and late model W124's have first gear start in there 722.4's. Problem is they are made for electronic speedos (speedo pickup is from the diff)
Earlier 722.3's and 4's used mechanical cable speedos driven from the tranny.

You might want to look at the 190e.rev forum and the mod section to suss out what those guys do to get the transmission to handle the extra power

F.W.I.W. I put a 722.3 into a 260E when one of the 722.4's failed. Wasn't very satisfactory - diff ratio, different gearing and shift points. Ended up putting another 722.4 back in.
W211 - E240
W204 - C280
W202 - C180
W210 - E240
Departed
W202 - C200
W202 - C180 - On consignment to nephew
W126 - 380SE , 380SE (Ex SA Import), 560SEL
W124 - 300e, 260e (ex Japan)
W111 220s (Indonesia) 4 speed manual column shift
W123 230
W116 450SEL
W140 420SEL
W210 E240
W209 CLK 240
W201 190e 2.6 (ex U.K.)

CraigB
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Re: 722.4 box question

Post by CraigB » Thu 21 Jan, 2016 8:37 pm

Just something i stored away in my memory from someone on here (andrew?) that has or mate has fitted a manual trans from a Musso which i think had your engine. Also the box is driving 4 wheels and a heavier body so you would think it can take a bit of extra grunt. I believe it is a separate box and not attached transfer case and straight bolt in. But mind you, don't see many on the road these days but maybe there are a few lying about in backyards. And worth noting if anybody ever sees one being wrecked or at a self serve wrecker, I would imagine will always be a market for them. Pedal box etc shouldn't be too hard. But this is secondhand information you need to confirm.
Craig Baulderstone
Lurch
280s's
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vanir
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Model you own: w201

Re: 722.4 box question

Post by vanir » Sat 23 Jan, 2016 2:34 pm

Thank you very much for the replies, they've cleared a few things up for me. It does look like I'll be needing a manual conversion, probably have to source it from a european based 124 wrecking, seems the most common place to still find a 5spd for a 103 with flywheel, usable pedal box, only other bit is the front tailshaft section.
Or maybe MB Spares can put together another kit to sell as a package.

I just hope my worn 722.4 can last a few months. The weirdness engaging reverse is scaring me and the 2nd-3rd upshift is hopelessly loose, whilst others are solid. But sometimes I just gotta floor it to zip through some traffic and smoke a cigar. Really though avoiding collisions in idiot traffic means being a little hard on a gearbox, it's either that or using speed instead of gearing and that'll just get you booked. So as a daily I am hard on the gearbox in any language.
W201.029 w/ M103.983
22/62 cam w/11mm lift
63mm exhaust
215 and 235 kumho tyres.

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Ivanerrol
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Joined: Sat 12 May, 2007 3:21 pm
Model you own: w204
Location: Melbourne

Re: 722.4 box question

Post by Ivanerrol » Sat 23 Jan, 2016 10:14 pm

You maybe better off sourcing a W201 180e with a manual gearbox. And then doing some creative transplants.
There were many of these originally sold.

There maybe no guarantee a manual box out of a w124 will fit. There would be a minute amount of W124 manuals to be found anyway.
W211 - E240
W204 - C280
W202 - C180
W210 - E240
Departed
W202 - C200
W202 - C180 - On consignment to nephew
W126 - 380SE , 380SE (Ex SA Import), 560SEL
W124 - 300e, 260e (ex Japan)
W111 220s (Indonesia) 4 speed manual column shift
W123 230
W116 450SEL
W140 420SEL
W210 E240
W209 CLK 240
W201 190e 2.6 (ex U.K.)

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AMG
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Re: 722.4 box question

Post by AMG » Wed 27 Jan, 2016 8:30 pm

There's a 722.3 from a 24v Laying around somewhere here..

The temptation for a manual is always there, but the getrag boxes are really slow shifting by modern standards, particularly the dogleg.

If it were me I'd look for a manual 5 speed from a 2.6 from the states or europe. You should be able to get one relatively easily.

Not cheap though, because you will be rebuilding it before you put it in. Which is why the auto makes sense.

change the fluids & filter in the trans and see how you go first.
Current:
1987 560SL 4sp. auto Signalrot "Stella"
1987 190E 2.3-16 5sp. man. Blauschwarz "Hermann"
1992 300CE-24 6sp. man. Perlblau / Iceblau "Gretel"
1992 Range Rover Vogue SE 4sp auto Ardenne Green "Oswald"
2012 Renault Sport Megane RS265 Trophy 8:08 6 sp. man. Liquid Yellow "Jean Rédélé"
Previous:
1986 560SEL Anthracitgrau "Schultz" - In Mercedes Heaven
1987 190E 2.6 4sp. auto Signalrot "Sabine" - which now resides/owns Andrew M's Garage
1972 350SLC Astralsilber "Lurch" - now in the loving care of Craig B
1989 2.5-16 Blauschwarz 4sp. auto (parted) formerly owned by Derek/Hasan.

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