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Car Forum / Mercedes-Benz Cars / January 200784 300TDT Transmission Hunt
I am going on a auto wrecking yard hunt this weekend for an automatic tranny for my 84 300TDT. Can someone give me a broad guide line of the years/models that will work in this car? Am I right in thinking almost any 80's 300 turbo model wil have a like transmission? Are non-turbo's a possibility? I sure appreciate any of your help. -Gar http://coltonmotorexpress.blogspot.com/index.html The Turbo's transmission differs from the non turbo transmission. The non turbo starts off in 2nd gear by default whereas the turbo transmission idles in 2nd but automatically downshifts to 1st gear upon throttle application and release of the brakes - that's done for improved acceleration. There may also be internal differences in terms of heavier duty parts etc. to carry the turbo's torque. I suggest the thing to watch for - further - is your car's pressure rod or cable from the throttle linkage to the transmission and its vacuum connections to the existing transmission and to find a box to match those. Why try to reinvent something that's already been invented and works! You want like for like. > The Turbo's transmission differs from the non turbo transmission. The > non turbo starts off in 2nd gear by default whereas the turbo [quoted text clipped - 10 lines] > > You want like for like. Thanks, thats helpful info. I didn't realize the shifting difference. I will take a couple pix and take them with me. [hadn't thought of that prior to your post] Another question: Is there a way to make my old 300cd start in first? If it had a turbo trans? Thanks again, -Gar http://coltonmotorexpress.blogspot.com/index.html Take the transmission number off the old box - that's what you'll need. Look for a number similar to: 722.120 W4 B 025 (from '80 300SD box) As to a retrofit of the CD - forget it. Rather, manually shift it into L at a dead stop to gain 1st gear. Start off, then, appropriately, shift to S and immediately BACK to L to hold 2nd, then, appropriately, shift to S for 3rd and D for 4th. There you have it - 1st gear start off, but you do the shifting. If you are within driving distance of Southern Idaho, I have an automatic tranny from an 83 300SD. It's a leftover part from my engine transplant of several years ago. Was working fine when it got yanked. I'd be willing to give it away just to get it gone. Drop me an email if you are interested. Rochelle 300SD is the 126 body. It uses an e;ectronic speedometer. 300TDT is the 123 body. It uses a cable driven speedometer. The tailshafts are different...... > If you are within driving distance of Southern Idaho, I have an > automatic tranny from an 83 300SD. It's a leftover part from my engine [quoted text clipped - 3 lines] > > Rochelle > 300SD is the 126 body. It uses an e;ectronic speedometer. > 300TDT is the 123 body. It uses a cable driven speedometer. > The tailshafts are different...... Didn't know the differences in the speedo. I kept my manual transmission when I did the transplant. The offer stands though, to anyone who would like the tranny and is willing to pick it up or pay shipping. I just want it gone. Rochelle P.S. I also have a 240D engine for a core if someone would like it. Pick up only in Southern Idaho > I am going on a auto wrecking yard hunt this weekend for an > automatic tranny for my 84 300TDT. Can someone give me a [quoted text clipped - 4 lines] > > http://coltonmotorexpress.blogspot.com/index.html I'll sell my '83 Turbo Wagon for $1250. Solid body and shifts well. Located near Buffalo, NY. Gary C |
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