Clutch Slave Differences (1 Viewer)

[rgentry]

Slave cylinder went out on my '68. I have a rebuild kit and
a pile of old cores -- can't afford to wait around for a new
one to be delivered. SOR shows 3 versions of the clutch
slave:

1. 58 - 7/70 (that's me)
2. 7/70 - 74
3. 74 on ...

I bet my cores are from #2. Will they bolt up and use
the same hose?

 

[rgentry]

One of my old cast-iron clutch slave cores has the number 52
and three little mountains embossed on it. The other has the
number 63 and the same three little mountains -- looks like this ^^^.

Tried search, no help. I do have the OEM rebuild kit
04313-35011 which appears to be the proper one. I'll dig into it
tomorrow.

 

[Poser]

Hone it and give it a shot...



Good luck!



-Steve

 

[rgentry]

Will hone and go. When your DD'er is 40 years old, you need to have some
spares on hand. I really wanted a Land Rover SWB once a long while
ago; got the old manual out and the Brits were really funny -- the owners
manual had a list of suggested spares including an alternator, starter,
tyres ...

The reason they put the spare tyre on the hood is so you could have room
in the back for all that other stuff.


And just to reinforce the old proverb -- I DID replace my clutch master
one month ago without replacing the slave. Doh.

 

[KArmstrong]

Hilarious!!

Exactly why I have a LWB Series Rover

 

[Poser]

Will hone and go. When your DD'er is 40 years old, you need to have some
spares on hand. I really wanted a Land Rover SWB once a long while
ago; got the old manual out and the Brits were really funny -- the owners
manual had a list of suggested spares including an alternator, starter,
tyres ...

The reason they put the spare tyre on the hood is so you could have room
in the back for all that other stuff.

don't forget the spare rear axle shafts....the hweakest full-float set up known to the truck world...makes the old military 44 full floats junkers found in jeeps look bullet-proof.

And just to reinforce the old proverb -- I DID replace my clutch master one month ago without replacing the slave.

Been there, done that back in '88....one of the first things learned....they always get replaced in pairs now.

 

[65swb45]

Russell, one kit covers 66 thru 74 BUT the hose connection is different. 7/70 up is like the brake lines, 10mm. 7/70 down uses a COMPLETELY different hose fitting.

I suppose you've discovered that already.

 

[rgentry]

I'll try to list it the way I see it for the record and Mark can correct me:

1. early - 1966. clutch slave was 7/8" in diameter and used the older hose.
(I have the OEM rebuild kit for that slave but it does not work on my '68).
It appears that this cylinder is no longer available, but the repair kits are.
The part number may have merged with number 2, below.

2. 1966-7/70 cluch slave was 3/4" in diameter and used the same older
hose as number 1, above.

3. 7/70 - 8/74 - same diameter as the last one but a different hose. The
change happened the same time as the dual brake master cylinder.

4. 8/74 - 85 - diameter increased to 13/16".

Mark, you don't have a clutch tube (new or used) from a '66 to '71 in your
stash do you? This seems to the part that Toyota just discontinued.

 

[65swb45]

Russell, I am at home now, and it's 10:52 pm, but for some reason I seem to remember that the internal diameter on the slave changed in 1/75, tho the pushrod would have changed in 8/74, so to be complete, you would have to list that one transition slave [earlier kit, later pushrod] in your listing.

Then Poser can move it to the FAQ!

For some strange reason, I did actually start a collection of those early clutch tubes some years ago. I'm not really sure how many are in the box. I think there are even some NOS banjo fittings up there. I don't look up on that shelf very often.

 

[FJ40Jim]

There is no change in clutch slave cylinder @ 01/75. Last change was 08/74 when the clutch PP changed to diaphragm. That is when the pushrod was changed, to accomodate the cast iron release fork.

 

[rgentry]

There does appear to be a change in 1980. Edited with Part Numbers:

1. early - 1966. clutch slave was 7/8" in diameter and used the older hose.
It appears that this cylinder is no longer available, but the repair kits are.
The part number may have merged with number 2, below.
Clutch Slave: (no longer available, use #2 below ???)
Clutch Slave Kit: 04313-35011

2. 1966-7/70 cluch slave was 3/4" in diameter and used the same older
hose as number 1, above. Tiny bleeder screw (8 mm wrench). Round it
off in no time flat.
Clutch Slave: 31470-60021
Clutch Slave Kit: 04313-60011

3. 7/70 - 8/74 - same diameter as the last one (3/4") but a different hose. The
change happened the same time as the dual brake master cylinder.
Clutch Slave: 31470-60022
Clutch Slave Kit: 04313-60011

4. 8/74 - 7/80 - diameter increased to 13/16". New clutch rod due to change
in pressure plate -- thanks Jim.
Clutch Slave: 31470-60071
Clutch Slave Kit: 04313-60020

5. 8/80 - 4/85 - diameter still 13/16", why did the PN change?
Clutch Slave: 31470-60081
Clutch Slave Kit: 04313-60020

 

[Jon in NC]

I'm getting ready to dive into changing the clutch master/slave cyl. myself and never having done this before, is there anything I need to know before I begin?

 

[Pin_Head]

Rebuilding clutch slaves can be dicey because the piston tends to wobble in the cylinder and it wears a groove in the casting so that it won't seal. Inspect the inside of the csting carefully.

 

[Jon in NC]

I'm thinking of just replacing the old cyl. with new. Never done it before. Suggestions? Warnings?

 

[rgentry]

An aftermarket japanese slave cylinder is only around $25. The OEM ones are only $70 or so. Probably best just to get new slave cylinder. Interesting what PH says but it make sense -- the slave rod on my '68 is not exacly parallel with the cylilnder, so it does put a side thrust on the piston. The key lesson here is to replace both the slave and the master at the same time. If you don't care about staying with your year vintage, SOR, CCOT and I'm sure Mark, will sell you a kit with the the lines, hoses and everything. I am going to have a new master, hose, and slave when I'm done. The older lines are no longer available (but they are steel and don't wear out of course).

 

[Owyhee Jackass]

So, is there a difference between 40/45 and 55 slaves? My '73 FJ55 slave just blew it's load this morning and I can't for the life of me find a replacement. Toyota shows it no longer available as does $OR and every other parts shop in town. I can get one for a 40, but not a 55. Would one from a 60 work possibly?

The hose fitting is smaller on the 55. My plan is to use a 'new' 40 slave and get a custom hose made with the 40 slave end and the 55's hard line end. Anyone have a better suggestion? I know I could attempt a rebuild, but this thing seriously blew it's load, I have no internals left and the rod sheared in two also. I'd rather have a completely new assembly.

I was going to replace my master and booster with one out of a '78 FJ55, along with the '78s disc front end. I'm wondering now, if the '78's Master has the same hard-line fittings as my '73?

 

[cruiseroutfit]

Russell, one kit covers 66 thru 74 BUT the hose connection is different. 7/70 up is like the brake lines, 10mm. 7/70 down uses a COMPLETELY different hose fitting.

I suppose you've discovered that already.

Mark, do you know what the 7/70 & older slave cylinder fitting size is? 11mm by chance? Is it 11 x 1.0mm?

There does appear to be a change in 1980. Edited with Part Numbers:

1. early - 1966. clutch slave was 7/8" in diameter and used the older hose.
It appears that this cylinder is no longer available, but the repair kits are.
The part number may have merged with number 2, below.
Clutch Slave: (no longer available, use #2 below ???)
Clutch Slave Kit: 04313-35011
(11mm correct?)

2. 1966-7/70 cluch slave was 3/4" in diameter and used the same older
hose as number 1, above. Tiny bleeder screw (8 mm wrench). Round it
off in no time flat.
Clutch Slave: 31470-60021
Clutch Slave Kit: 04313-60011
(11mm correct?)

3. 7/70 - 8/74 - same diameter as the last one (3/4") but a different hose. The
change happened the same time as the dual brake master cylinder.
Clutch Slave: 31470-60022
Clutch Slave Kit: 04313-60011
(10mm correct?)

Do my edits above look right? @treerootCO this jive to you?

EDIT: Answered my question by looking at Racer65's new hose offerings
Shutterfly