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Clutch time + ??

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smtguy
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Clutch time + ??

Post by smtguy » Thu Mar 05, 2020 12:49 am

I am thinking about the parts I need to gather for a clutch replacement on my '83 633, (and other things while I am in):

Sachs clutch kit (clutch plate, pressure plate, t/o bearing)
Pilot bearing
rear main seal
gearbox front seal
slave cylinder
What have I missed?

With the gearbox out, I would like to replace whatever bushings, etc I need to to tighten up the slop in the shifter and make it not so difficult to get into gear when cold, but I don't know what parts are needed. Gearbox is Getrag 260. Looking for advice and suggestions.

Thanks!
1983 Bronzit 633CSi 5 speed
2001 Jaguar XJR
2004 Audi TT

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bakemono
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Re: Clutch time + ??

Post by bakemono » Sat Mar 07, 2020 4:35 am

Might be a good time to do the guibo/giubo/flexdisc and the transmission mounts if the rubber is showing any signs of coming apart.

There are several parts in the shift linkage, and the more of them that you replace the better it gets. See this page:
https://www.realoem.com/bmw/enUS/showpa ... Id=25_0150

Unforunately the parts database is rather confusing these days. For instance, I don"t know why there are 6 part numbers for #1
'82 528e - M50B25 + GS6-37BZ
'83 633CSi - Megasquirt and a 3.46LSD

baders
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Re: Clutch time + ??

Post by baders » Sat Mar 07, 2020 8:20 am

bakemono wrote:
Sat Mar 07, 2020 4:35 am

Unforunately the parts database is rather confusing these days. For instance, I don"t know why there are 6 part numbers for #1
Parts that are superseded by others and parts that supersede others.
1986 635csi LOCUTUS / Arktis Blau Metallic / Pearl Beige / S38B36/ Close ratio dogleg 5sp
2002 E46 M3 / Topaz Blau Metallic / Black Nappa / 6 speed SMG software tuned / Bilstein PSS10 Coilovers / CMP RACP reinforcement

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86_6series
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Re: Clutch time + ??

Post by 86_6series » Sat Mar 07, 2020 12:30 pm

Use ATF in your trans not gear oil.
The heavier gear oil will be too thick even when hot to
slow down the synchros when downshifting.

It's labeled on the parts page.
https://www.realoem.com/bmw/enUS/showpa ... Id=23_0725

emac
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Re: Clutch time + ??

Post by emac » Sat Mar 07, 2020 1:55 pm

Should be a seal where the shifter comes out of the tranny. I would put one on the list. When doing the shifter make sure you order the right number of parts. For example it will list a washer, but you need 4 of them, not just one.

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Ralph in Socal
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Re: Clutch time + ??

Post by Ralph in Socal » Tue Mar 10, 2020 9:35 pm

The front (input) seal is in a case that bolts to the trans. Replace the gasket for that case.

There is a plastic pin (clutch fork pivot pin) that easily wears out so it should be replaced. Located on the other end of the clutch fork from the slave cylinder. Someone made a metal one for more $$. Good luck

Ralph
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85 635csi Zinno Auto
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bimmern00b
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Re: Clutch time + ??

Post by bimmern00b » Wed Apr 08, 2020 9:27 am

bakemono wrote:
Sat Mar 07, 2020 4:35 am
Might be a good time to do the guibo/giubo/flexdisc and the transmission mounts if the rubber is showing any signs of coming apart.

There are several parts in the shift linkage, and the more of them that you replace the better it gets. See this page:
https://www.realoem.com/bmw/enUS/showpa ... Id=25_0150

Unforunately the parts database is rather confusing these days. For instance, I don"t know why there are 6 part numbers for #1
would this be all that needs to be changed for better shifting?

Rondel Fan
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Re: Clutch time + ??

Post by Rondel Fan » Thu Apr 09, 2020 9:48 pm

The biggest difference will come from all new shifter bushings and one of these to replace the pressed metal factory unit.
There a few manufacturers I think. A number of purveyors make the "bushing kits" to replace all the contact points for the shifter, selector rod carriage and pivots etc.

Image
http://www.uucmotorwerks.com/dssr/

I have on in my e30 and the PO of my 635 had installed one. It has the tightest shifter feel since my 944T which I personally rebuilt with custom bits the get a nice snug and direct shift feel.

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