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#1
10-12-2009, 07:47 PM
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1st gear slips bad!!!
After reading a lot of posts i'm still wondering what to do next
1985 300D 2 days ago all of a sudden w/o warning 1st gear started slipping, all other gears inc. reverse work fine. checked level and it was low. next day decided to do a trans service rather than just add fluid. drained TC, new filter, and 7+qts dex lll 1st still slips badly but slightly different, not the shudder and bang just a smooth slip now from start and 2nd gear shift shudders for a short second 3rd is same and 4th doesn't bang removed trans vacuum line but no change. this car shifted like this b4 all this happened 1-2 very firm & fast 2-3 slips a little and slow 3-4 extremely fast almost a bang also this car has under 60K miles i'm prayin its something i can fix. you all havent let me down yet! thanks in advance
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http://i166.photobucket.com/albums/u116/OC03/240d.jpg Current Car: 1985 300DT 55K miles 
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#2
10-12-2009, 07:58 PM
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Quote:
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 1981 300SD 512k OM603
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#4
10-12-2009, 10:00 PM
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First base is fluid and filter change, as low fluid will make it slip with sort of a surging motion (check fluid again just to make sure). Second step is probably the B2 piston - did you look up into the transmission to see anything awry? B2 band is right above the valve body and you can see it from the bottom. In your fluid and filter change, did you see any particles or anything out of the ordinary in the pan?
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TC Current stable: - 2004 Mazda RALLYWANKEL - 2007 Saturn sky redline - 2004 Explorer...under surgery. Past: 135i, GTI, 300E, 300SD, 300SD, Stealth
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#5
10-12-2009, 11:32 PM
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hi thx for the replies
the pan was pristine except for 1 small piece of metal or clutch material, about the size of 2 pin heads as for the b2 i didnt see anything. i wouldnt now what to look for anyway, i wish i had read more b4 i did the trans service. does it sound like i have a textbook case of it?
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http://i166.photobucket.com/albums/u116/OC03/240d.jpg Current Car: 1985 300DT 55K miles Last edited by richclan; 10-13-2009 at 05:22 PM.
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#6
10-13-2009, 05:25 PM
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is it possible if the b2 piston / band is stuck, can one free it up w/o dropping the pan???????
like xtrans additive or shifting back & forth between rev. and drive, i hate to wast all that fluid
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http://i166.photobucket.com/albums/u116/OC03/240d.jpg Current Car: 1985 300DT 55K miles
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#7
10-13-2009, 05:51 PM
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You can always re-use the fluid. I filter through a coffee filter if I think it needs it. As for the B2. Pull the cover and pull the piston. Most likely it is broke as in pieces. If it's not in pieces you can free it up I guess but I would replace it. If it's hung up there must be a reason and it wont fix itself. Good luck. Thanks
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83 300D 227,xxx miles, sold 86 300 SDL 130,000 miles, sold
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#8
10-20-2009, 11:19 AM
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does anyone have a link for a DIY w/photos on this repair?
i looked but didnt find any detailed posts
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http://i166.photobucket.com/albums/u116/OC03/240d.jpg Current Car: 1985 300DT 55K miles
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#9
10-20-2009, 04:35 PM
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Quote:
__________________
TC Current stable: - 2004 Mazda RALLYWANKEL - 2007 Saturn sky redline - 2004 Explorer...under surgery. Past: 135i, GTI, 300E, 300SD, 300SD, Stealth
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#10
10-22-2009, 11:53 PM
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thx tbomachines that was a good link, and to all the other peeps.
tonight i tore it open to find a broken b2 piston. wwwwwwwwwwwwwwwwwwwwwwwwwwweeeeeeeeeeeeeeeeeeeeeeeeee i cant believe how happy i was to find it, so instead of thousands its a little over a hundred bucks. im going to order a k-1 spring kit for my 2-3 flair issue piston $100. k-1 kit $7. IMPORTANT ?  is there anything i should do to address my 3-4 BANG shift now that i have the trans opened up???? i am ordering the parts tomorrow so let me know asap. thanks
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http://i166.photobucket.com/albums/u116/OC03/240d.jpg Current Car: 1985 300DT 55K miles
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#11
10-23-2009, 01:48 AM
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YESSSSSSS Mine acts up occasionally with the 1st gear slip. Funny, I replaced my last tranny becuase first slipped. And then I replaced my uncles because first slipped. Wow.
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1981 300SD 512k OM603
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#12
10-23-2009, 10:21 AM
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sry to hear that turbobenz.
its amazing just how little we know individually and how much we know as a group  this place rocks 
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http://i166.photobucket.com/albums/u116/OC03/240d.jpg Current Car: 1985 300DT 55K miles
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#13
10-23-2009, 12:19 PM
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Or buy a later used B2 (pull it yourself) at a junkyard for $5.
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 Gone to the dark side - Jeff
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#14
10-28-2009, 12:25 AM
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tonight i finally got everything re-assembled and went for a very short road test.
wow it acts like a different trans. altogether 1-2, 2-3 nice and firm 3-4 i have to wait and see. not enough road, late with heavy rain. *******IMPORTANT****** anyone doing this repair should buy the seal that holds the plastic bushing in place. #006 997 73 47 . it wasnt clear to me when i read the posts. it cost me 4 bucks, and held me back a day. i had thought that the seal mentioned was the o-ring seal and if i removed/replaced it, i was in for trouble. the other thing was that on my 123 i didnt have to remove the header pipe from the engine. diesel giant removed his but his was on a 126 chassis. thanks to diesel giant for the great write up on this repair, and for pointing out his mistake on the push rod, so i wouldnt mess it up as well.
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http://i166.photobucket.com/albums/u116/OC03/240d.jpg Current Car: 1985 300DT 55K miles Last edited by richclan; 10-28-2009 at 12:36 AM.
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