Shifter Mechanisme

Philippe db

Philippe db

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Hi guys,

Would appreciate some advice.

Before selling the Csi I noticed that there was quite a difference in the way the shifter mechanisme worked in both cars. Very smooth, short almost automatically slipping in to the next gear on the Csi and rather sticky with long shift that need precise guidance on the Cs.

Now that the Csi is gone I kind of start to miss that shift feeling and was wondering what could cause te difference and what I would need to do to get the Cs shift mechanisme up to speed again.

Both cars were equiped with the standard 4 speed Gertrag gearbox that as far as I can tell works perfect.

Many thanks in advance
 
replace the 4 shift tower bushings 25111202842
replace and grease the 2 sockets 23411466110
relpace and grease the 2 bushings 23411466120

another point of wear could be in the rod joint 23411466130 and the rod/pin iteslf but the above will improve it greatly.
 
Hi Steve,

Thanks for the input , this is what I was hoping for that the problem could be solved by simply replacing some 45 year old parts.

Just one more question are all these part numbers still available from BMW?

Like I wrote it shifts fine without making any noises but I feel that their is some resistance pulling it out of one gear and engaging the next even more when the engine is still cold.
 
Not sure if it will help the resistance in and out of gear, but the new tower bushings may help if there is some looseness there now. All parts available from BMW, the tower bushings are available much cheaper in the aftermarket.
 
Stevehose said:
another point of wear could be in the rod joint 23411466130
Click to expand...

Interesting, I thought this part was NLA due to realoem recommending the newer style rod joint with an E21 connecting rod. It probably was NLA at one point. I wanted to use a short shifter anyway, so I went with all the newer stuff. Unfortunately UUC doesn't make their "DSSR" in the E21 fitment or I'd use that. But if you think about it, their "dual shear" design is exactly what the E9 had going on already, so maybe it's best to keep that setup if you're satisfied with the factory length of throw.

The pins wear a good bit and are only $1-something each. Would definitely replace them anytime you're in there.
 
Stevehose said:
Not sure how to do a short throw with the 4 speed, the 5 speed is easy with a UUC 140mm dog bone
Click to expand...

Same deal, just need a 151mm connecting rod (fits 80-82 320i). UUC doesn't make that length (yet?).
 
Steve, Where do the 4 tower bushings go? The parts diagram isn't helpful in that regard and I don't recall them from when I dropped the gearbox and engine.
 
On a 4 speed there are four, they mount between the transmission case and the front of the metal shift tower. On a 5 speed there are 2, the rear part of the tower is supported by another type of bushing on the driveshaft tunnel. If they have failed there will be play when shifting.


Luis A. said:
Steve, Where do the 4 tower bushings go? The parts diagram isn't helpful in that regard and I don't recall them from when I dropped the gearbox and engine.
Click to expand...
 
Ok, that rings a bell now, thanks. I didn't replace them on my 4-speed but my shifting is OK although not as buttery as Philippe describes his CSi shifting ton have been.
 
Disregard what I said about the 151mm E21 linkage rod. It's not even close. You can see here it's the recommended part for using in conjunction with the newer style rod joint: http://www.realoem.com/bmw/enUS/showparts?id=3435-USA-10-1972-E9-BMW-30CS&diagId=23_0813 But that is not correct. It needs to be around 233mm according to my tape measure. E30 M3 is 215mm, but that's probably not close enough. I'll keep looking, or maybe just have to make one.
 
It seems that a 4 speed E12 has the exact same shifter setup except with the newer style shifter and rod joint. So it seems that the connecting rod for that would be a perfect fit, but they don't tell the length on that one so who knows for sure. I'll probably order one and see. Part #25 11 1 204 364
 
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