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#1
10-28-2016, 05:22 PM
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More modern manual gearbox that fits M116
Hi.
Just thinking about my next project. Like the M116 3.5 but would like a 5 speed manual. Do any of the later boxes match and make easy conversion? Cheers 
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#2
10-29-2016, 05:34 PM
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Quote:
None are a direct bolt on, the closest is the 5-spd version of the iron case 4-spd and its input shaft is shorter than that of the 4-spd that was used with the M116, however that 5-spd box is exceedingly rare. The aluminum case Getrag 5-spd box that was used in W123s with the OM616/617 & M110 engines comes as close as is possible, but will require some adapter work nevertheless. Generally, the intermediate plate that is on your engine would be retained for starter mounting and structural reasons, and then a bespoke clutch housing would be fabricated to match the chosen gearbox to the intermediate plate. You may wish to look thru this thread to see what is being done that is similar: http://www.peachparts.com/shopforum/performance-paddock/271090-non-mb-trans-mb-engines.html Last edited by Frank Reiner; 10-29-2016 at 07:21 PM.
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#3
10-29-2016, 05:57 PM
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My understanding may be incorrect, but I believe the 5-speed transmissions for the m110 enginhad two different versions:
1) a version available from 1974 to ~1976 that was like the 4 speed of the era but with an overdrive bolted onto the rear. Apparently as benzworld user MBFool has proven with his 350sl 5-speed (conversion), this overdrive gear can be bolted onto the 350sl 4-speed transmission. 2) the later integrated bell getrag 275 5-speed from the 80's. I'm not sure if the tailcone on this one includes the 5th gear, but the tailcone is detachable and contains an electronic speedo sensor for r107 cars and a mechanical pickup for w123 cars.
__________________
Past mb: '73 450sl, '81 280slc stick, '71 250, '72 250c, '70 250c, '79 280sl, '73 450sl, parted: '75 240d stick, '69 280s, '73 450slc, '72 450sl,
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#4
10-29-2016, 07:17 PM
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Quote:
The 5-spd rear housing and the internals do attach to the main case in the same manner and use the same bolt pattern as the rear housing of the 4-spd, however the key component is the transmission mainshaft which is longer in the 5-spd version than the 4-spd. If one had a main shaft from a 5-spd, one might very well have the whole 5-spd box. Re: 2) The 275 has two principal versions: w/OD, in which the OD 5th gear is in the tail housing, along with reverse. wo/OD, in which 5th is 1:1, and in the main case, while 1st & R are in the tail housing.
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#5
10-30-2016, 03:45 PM
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I'm really not into building up gearboxes or fabrication of bellhouses etc. Just don't have the knowledge.
More of a unbolt this, fix that, replace other, and bolt that back on there type of home mechanic! Lol. Can you please let me know the best 4 speed manual box to go for on a lightened 280/300.? Are there different codes? Different ratios? What cars/engines did these go on? Thanks for your advice
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#6
10-30-2016, 04:23 PM
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Quote:
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#7
10-31-2016, 04:39 AM
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Well, from what I've read, the original AMG rally car was a stripped 300SEL with a 6.3 rebuilt as a 6.8.
I love the retro look of it but exact replicas seem to cost 100's of thousands = not for me! Lol I've so enjoyed saving my wedding car project (300SEL 3.5) from the breakers, that I'd like to have ago at build a (loose) rally replica. Here we go... 3.5 V8....... (because of parts, costs, availability) and hell it's still a Mercedes V8! Lol. 280............ don't need all the air-suspension complications. Just fit slightly lower springs. SE.............. I know the original was longer but really can't see the advantage in a fun rally car. It will be stripped down with big spotlights and roll cage added. So cool.
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#8
10-31-2016, 04:41 AM
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Ohh and of course, manual gearbox!!!!
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#9
10-31-2016, 02:35 PM
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So you still need the manual transmission and flywheel and everything. Right?
I would think that if you want to bolt a manual transmission to a m116, then you you start with a manual transmission m116. There's a guy doing a pretty impressive m119 build in a w108 right now. I'd like to do the same with the parts car 1973 280sel we've got laying around in the warehouse.
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Past mb: '73 450sl, '81 280slc stick, '71 250, '72 250c, '70 250c, '79 280sl, '73 450sl, parted: '75 240d stick, '69 280s, '73 450slc, '72 450sl,
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#10
10-31-2016, 02:55 PM
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Are you considering converting your air suspension car to steel springs?
Quote:
__________________
 Tony HW111 280SE 3.5 Coupe Manual transmission Past cars: Porsche 914 2.0 '64 Jaguar XKE Roadster '57 Oval Window VW '71 Toyota Hilux Pickup Truck-Dad bought new '73 Toyota Celica GT
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#11
10-31-2016, 04:36 PM
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Didn't the 280se come with regular springs?
Was there only one manual box? Rhd 280se m116 are kinda rare and everyone I've seen has been automatic.
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#12
10-31-2016, 10:36 PM
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Sorry-I misunderstood your post-I thought you had a 300SEL
__________________
Tony HW111 280SE 3.5 Coupe Manual transmission Past cars: Porsche 914 2.0 '64 Jaguar XKE Roadster '57 Oval Window VW '71 Toyota Hilux Pickup Truck-Dad bought new '73 Toyota Celica GT
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#13
11-01-2016, 02:51 AM
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I do.
Love it. Want to build rally car out of 280se. Want manual box. But they seem so rare.
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#14
11-01-2016, 08:52 AM
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Hypothetical chassis, hypothetical engine, hypothetical gearbox; piece of cake.
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#15
11-01-2016, 05:46 PM
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People seem to be getting confused.
I'll make it simpler. Forget projects/builds/plans. Is there only one manual gear box for the W108 W109 range? Or do different engines have different ratio boxes.?
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