Author Topic: M-21 lube leaking out of the speedo cable  (Read 7404 times)

JohnZ

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Re: M-21 lube leaking out of the speedo cable
« Reply #15 on: August 25, 2009, 03:53:34 PM »
John do you have another part number for the seal? What I got today at NAPA was for an automatic transmission and they did not have the part number for the bullet.

Thanks!

The GM part numbers for the fitting w/seal and for the seal by itself are as I posted above. Paragon has the fitting w/seal (their #7188K) and the seal by itself (their #10481). Pre-1966 fittings (bullets) aren't machined to accept the seal.
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sixt9x33rs

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Re: M-21 lube leaking out of the speedo cable
« Reply #16 on: August 26, 2009, 10:34:24 AM »
John,

I was able to buy a new bullet for $5 from a local transmission shop. I put it in last night. I will take the car for a nice long drive and see what happens.

Thanks!
'69 RS Z/28 Olympic Gold, 711
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69 X77 Z/28 69 711 Original Paint Unrestored
'69 X66 Convertible Cortez Silver 712 black top Endura, auto, bumper guards, am/fm rear speaker 44k miles

sixt9x33rs

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Re: M-21 lube leaking out of the speedo cable
« Reply #17 on: December 22, 2009, 11:57:31 PM »
This is a follow up to the earlier post:

As I mentioned I have replaced the speedometer cable bullet and things seem to be fixed, but now I am getting the same issue as before. Oil walking up the cable dripping out on my foot at the point the cable connects to the speedometer.

Any ideas of what may be happening?

Thanks,
'69 RS Z/28 Olympic Gold, 711
Flat hood no spoiler, black top, endura, 4:10
POP 39,000
69 X77 Z/28 69 711 Original Paint Unrestored
'69 X66 Convertible Cortez Silver 712 black top Endura, auto, bumper guards, am/fm rear speaker 44k miles

JohnZ

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Re: M-21 lube leaking out of the speedo cable
« Reply #18 on: December 23, 2009, 03:05:11 PM »
This is a follow up to the earlier post:

As I mentioned I have replaced the speedometer cable bullet and things seem to be fixed, but now I am getting the same issue as before. Oil walking up the cable dripping out on my foot at the point the cable connects to the speedometer.

Any ideas of what may be happening?

Thanks,

Does the new "bullet" you got at the transmission shop have the black rubber seal in it around the end of the plastic gear, or is it the old style without the internal seal? If it has the seal, you shouldn't see any leakage up the cable.
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sixt9x33rs

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Re: M-21 lube leaking out of the speedo cable
« Reply #19 on: December 23, 2009, 03:32:36 PM »
John it has the seal, and it worked for awhile. I bought a second bullet as a backup so I guess I will put that one in and see what happens. I guess there is not another culprit?

Thanks,

Lawrence

This is a follow up to the earlier post:

As I mentioned I have replaced the speedometer cable bullet and things seem to be fixed, but now I am getting the same issue as before. Oil walking up the cable dripping out on my foot at the point the cable connects to the speedometer.

Any ideas of what may be happening?

Thanks,

Does the new "bullet" you got at the transmission shop have the black rubber seal in it around the end of the plastic gear, or is it the old style without the internal seal? If it has the seal, you shouldn't see any leakage up the cable.
'69 RS Z/28 Olympic Gold, 711
Flat hood no spoiler, black top, endura, 4:10
POP 39,000
69 X77 Z/28 69 711 Original Paint Unrestored
'69 X66 Convertible Cortez Silver 712 black top Endura, auto, bumper guards, am/fm rear speaker 44k miles

JohnZ

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Re: M-21 lube leaking out of the speedo cable
« Reply #20 on: December 24, 2009, 04:36:30 PM »
John it has the seal, and it worked for awhile. I bought a second bullet as a backup so I guess I will put that one in and see what happens. I guess there is not another culprit?

A bad seal (or no seal) is the only reason I can think of for trans lube to climb the flex shaft.
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mark x22

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Re: M-21 lube leaking out of the speedo cable
« Reply #21 on: December 24, 2009, 05:18:55 PM »
Could the cable be damaged cutting the new seal ?

sixt9x33rs

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Re: M-21 lube leaking out of the speedo cable
« Reply #22 on: December 25, 2009, 01:43:28 AM »
John it has the seal, and it worked for awhile. I bought a second bullet as a backup so I guess I will put that one in and see what happens. I guess there is not another culprit?

A bad seal (or no seal) is the only reason I can think of for trans lube to climb the flex shaft.

ok I am going to put the spare bullet in there and see what happens.
'69 RS Z/28 Olympic Gold, 711
Flat hood no spoiler, black top, endura, 4:10
POP 39,000
69 X77 Z/28 69 711 Original Paint Unrestored
'69 X66 Convertible Cortez Silver 712 black top Endura, auto, bumper guards, am/fm rear speaker 44k miles

L78 steve

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Re: M-21 lube leaking out of the speedo cable
« Reply #23 on: February 10, 2010, 05:17:23 PM »
Check the plastic gear also where the seal contacts for damage.
69 Z/28 Dover White X33,ZL2,PS,M20,Std.int.04C
67 SS/RS Mt. Green 1W,2LGSR,3SL,4K,5BY,07C
70 Nova L78 Blk. Cherry,Sandalwood,M21,02B