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#1
02-20-2017, 12:39 AM
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Question on 1990 300e transmission...
My '90 300 E has the trans that starts in second gear for economy purposes. I have been told that it is an easy job to swap my trans valve body for a later unit that will start in first. Can this swap be easily accomplished?...is it a just drain the trans, drop the pan and swap one valve body for the other and button it all back up? Sounds too easy...
J.G. 
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#2
02-21-2017, 04:19 PM
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Second gear starts are not economical.
The VB controls the shifting, I would venture to guess a later W124 E320 VB would work. Give it a try and let us know.
__________________
I'm not a doctor, but I'll have a look.  '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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#3
02-21-2017, 09:43 PM
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The 124.034 cars (400E, E420) have first gear start valve bodies. They do drop and swap. When I swapped one into my wagon there were a few quirks but 1st gear start far outweighs them. I eventually built another trans and made my own first gear start valve body. Its a nightmare. Don't even try, just swap an .034 V/B and live with any quirks.
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 90 300TE 4-M Turbo 103, T3/T04E 50 trim T04B cover .60 AR Stage 3 turbine .63 AR A2W I/C, 40 LB/HR MS2E, 60-2 Direct Coil Control 3" Exh, AEM W/B O2 Underdrive Alt. and P/S Pulleys, Vented Rear Discs, .034 Booster. 3.07 diffs 1st Gear Start 90 300CE 104.980 Milled & ported head, 10.3:1 compression 197° intake cam w/20° advancer Tuned CIS ECU 4° ignition advance PCS TCM2000, built 722.6 600W networked suction fan Sportline sway bars V8 rear subframe, Quaife ATB 3.06 diff
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#4
02-23-2017, 11:27 PM
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What about the W124 24V cars? I read they late ones start in first (E320s)... but are they still 722.3 or .4 then?
__________________
I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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#6
02-24-2017, 08:10 AM
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You can also do it electronically. The '84 and '85 500SEL and SEC's had a first gear start module. I have collected all the parts to put in my 260E but I'm waiting until I need to do interior work to combine jobs. A switch could be installed in the shifter escutcheon to give you the option of switching between 1st or 2nd gear start. First gear start is terrible if you have snow in the winter.
Do a search for the control module 002 545 41 32 to get more info.
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#7
02-24-2017, 10:17 AM
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Jay, at a stop shift momentarily into "2" then back to "D". When you accelerate the transmission should start in 1st gear, at least that's the way our 1991 300CE transmission reacts. Granted it's a pain to constantly shift to achieve 1st gear starts, but you will likely find that 2nd gear start is tolerable in most instances.
__________________
Fred Hoelzle
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#8
03-04-2017, 11:55 PM
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Use to be a company which sold a kit which would get these to start in first, and you could program the 2 - 1 speed. Sampled the pulses from the brake sensor, and you could program the chip with your computer. Worked by completing the downshift circuit at the accelerator pedal. Company called FSS switch. They are gone. Thought it would be a cool idea for my S500. The best idea for the S500 is to buy the v-8 (5 liter boys and girls ) in the first place. If you race someone and they win, simply point the S500 in a TBone manuever and they will cry Mama and slink home.
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