I wanted a lower first gear to go with my high-speed rear end. The stock 300SD has 3.68. I looked through the archives and found out the 300TD has a lower first gear. I found reference to a 3.86 first gear. But I found one reference to a 4.25 in a wagon, which would be perfect. Does any one know how I can identify one of these transmissions? Maybe some confirmation on what the TD first gear ratio really is. RPM vs. MPH in first gear from some of you TD owners might help; I could do the calculations from that.
Thanks In advance.

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Jim
82 300SD saved from scrap yard, 86 front clip,85 500SEL rear end,86 wheels.

Ok, can some one owning a 300td please tell me what rpm they are running in first gear and at what mph so I can calculate the first gear ratio.

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Jim
82 300SD saved from scrap yard, 86 front clip,85 500SEL rear end,86 wheels.

This Polish website has a lot of good data on transmission gearing:

http://macmerc.netium.com.pl/index0.html

Drill down a level or two and I think you will find what you need - look for the spinning gears if you don't read Polish

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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)

I can't find the transmission data on that site. I found the technical data and even some wiring diagrams and the engine and chassis manual. The site has some neat information. Too bad I can't read polish. I even looked for one of those free translators.

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Jim
82 300SD saved from scrap yard, 86 front clip,85 500SEL rear end,86 wheels.

I. 3,98; Ii. 2,39; Iii. 1,46; Iv. 1,0; R. 5,47

Belton - Think I have heard of that place

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BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif
15 VW Passat TDI
00 E420
98 E300 DT
97 E420 Donor Car - NEED PARTS? PM ME!
97 S500
97 E300D
86 Holden Jackaroo Turbo D
86 300SDL
(o\|/o)

So there is no 4.25 first gear on a 722.315. I remember finding it in the archives. I even saved it to a text file.

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Jim
82 300SD saved from scrap yard, 86 front clip,85 500SEL rear end,86 wheels.

my diesel haynes shows no gear ratios. my haynes 77-81 2803 manual shows 3.98 early and 3.68 late models.

if anything had a lower first gear it would be a 240 td which would be a euro model of course... this is a guess. also on my 115 240 it seemed as if the first gear was very low geared. this might be an avenue as i believe some of those trannys would bolt in.... but for me it would not be a chore worth doing unless my tranny was shot and needed replacing.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

I have a 300TD, I'm almost 100% sure the trans is the same. Mine is a 722.315, pretty sure most of them are, expect cali cars.

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-Randy Wakefield

1969 220D 4 speed (parts car)
1976 280C
1976 280S
1981 240D 4 speed (parts car)
1982 300D
1983 300TD (Ivory)
1983 300TD (gold)
1985 300TD (gray)
1987 190D 2.5
1970 280SEL (sold)
1977 240D 4 speed (sold)
1974 280 (rusted to death)
---
1927 Chevy 4 door sedan
1938 Chevy 2 door sedan
1950 Willys Jeepster
1955 Studebaker President 4 door
1977 Ford F250
1979 Glastron 17'
1948 John Deere A
1960 John Deere 2010
1979 Satoh S650G
--
2000 Bichon (Doby)

The way I read the data on the Polish website , for a 300TD after 9/81:

I. 4,25; II. 2,41; III. 1,49; IV. 1,0; R. 5,67

There's your 4.25 ,Frank

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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)

You are right! Wasn't very good at navigating the polish site

__________________
BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif
15 VW Passat TDI
00 E420
98 E300 DT
97 E420 Donor Car - NEED PARTS? PM ME!
97 S500
97 E300D
86 Holden Jackaroo Turbo D
86 300SDL
(o\|/o)

Thanks for the information. I really appreciate it. Is there any way to identify a 300td transmission?

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Jim
82 300SD saved from scrap yard, 86 front clip,85 500SEL rear end,86 wheels.

I checked the EPC and the part number for the 82-85 tranny is the usual 722.315. So I don't know how you would tell them apart without the engine or car attached. That seems odd.

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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)

Is there another series of numbers after the 315 that could designate the different gear ratios like 722.315.xxx. I looked at my transmission, but it looks like mine has been rebuilt. The rebuilder took a grinder and wiped the part number off of mine.

__________________
Jim
82 300SD saved from scrap yard, 86 front clip,85 500SEL rear end,86 wheels.