Author Topic: C4 shift shaft seal replacement  (Read 172 times)

Offline Hipo giddyup

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C4 shift shaft seal replacement
« on: November 20, 2017, 11:11:16 AM »
 With my latest project, (1966 289 with C4), the shaft seal for the shifter looks to be leaking. I have purchased the new seal and o-ring but wanted to know how difficult this would be in replacing the seal. Looks like I'll be dropping the pan and removing the valve body to get the shaft out? Any tips or pointers would be gladly appreciated. Thanks!
1967 Springtime Yellow Coupe, 289 2v 3spd, Metuchen built, Nov. 17th 66'
1966 Sahara Beige Coupe, 289 2v 3spd, Dearborn built, July 21st 66'
1964 1/2 Pagoda Green Coupe, 260 2v 3spd, Dearborn built, June 30th 64'
1966 GT350 Fastback clone, 289 HiPo, 725cfm Holley, 4spd, SanJose built, Nov 25th 65'

Offline carlite65

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Re: C4 shift shaft seal replacement
« Reply #1 on: November 20, 2017, 11:59:17 AM »
yes. drop pan & remove valve body. be careful upon reassembly in getting the shaft reinserted to the v/b. i've done a few of these & it is not difficult, just take your time.
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Offline Hipo giddyup

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Re: C4 shift shaft seal replacement
« Reply #2 on: November 20, 2017, 12:40:58 PM »
Thanks for the response Carlite. I was just worried about an oddball spring or gear popping out at me!! Always good to do some research before jumping right in!  ;D
1967 Springtime Yellow Coupe, 289 2v 3spd, Metuchen built, Nov. 17th 66'
1966 Sahara Beige Coupe, 289 2v 3spd, Dearborn built, July 21st 66'
1964 1/2 Pagoda Green Coupe, 260 2v 3spd, Dearborn built, June 30th 64'
1966 GT350 Fastback clone, 289 HiPo, 725cfm Holley, 4spd, SanJose built, Nov 25th 65'

Offline carlite65

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Re: C4 shift shaft seal replacement
« Reply #3 on: November 20, 2017, 12:47:13 PM »
kind of a messy job dropping the v/b. careful of the screw lengths they are different. don't be afraid to use plenty of brake cleaner & lint free towels. and dont forget the outer 'o' ring.
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Offline 67gtasanjose

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Re: C4 shift shaft seal replacement
« Reply #4 on: November 20, 2017, 12:56:52 PM »
No springs or check balls fall out...rather straight forward job as others have said. Watch the linkages when re-installing the valve body, the passing linkage should have a "return spring" tension back, when it is in right. It has a "feels right" feel about it. Test the "feel" before taking the valve body down and familiarize yourself with it. I think you will see how to index the main select valve, but a few people have gotten these all the way together with the passing gear linkage out of place before (speaking from experience ;) )
Richard Urch

1967 (11/2/66, S.J.) Luxury Coupe, 289-4V w/Thermactor Emissions, C-4, Well Optioned
2005 (04/05) GT Premium Convertible, Windveil Blue, Parchment Top w/Med. Parchment interior,  Roush Body Appointments

Offline Hipo giddyup

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Re: C4 shift shaft seal replacement
« Reply #5 on: November 20, 2017, 08:25:59 PM »
 Yikes, I think I can handle it since Iíve done most everything else on these cars. Then again I am trying to get a quote from a very reliable automatic transmission shop locally. If theyíre quite reasonable Iíll let the pros do it.  I forgot to mention I donít have a lift so all of this will be done on my back which Iím not looking forward to.  I can always reassure my skills in the spring when I go to repaint the car myself.  ;)
1967 Springtime Yellow Coupe, 289 2v 3spd, Metuchen built, Nov. 17th 66'
1966 Sahara Beige Coupe, 289 2v 3spd, Dearborn built, July 21st 66'
1964 1/2 Pagoda Green Coupe, 260 2v 3spd, Dearborn built, June 30th 64'
1966 GT350 Fastback clone, 289 HiPo, 725cfm Holley, 4spd, SanJose built, Nov 25th 65'

Offline 6S280

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Re: C4 shift shaft seal replacement
« Reply #6 on: November 20, 2017, 10:04:18 PM »
I did this exact repair myself for the first time last year. I concur with the advice from the others. I did mine with the car on jack stands. Did need a crows foot to get the nut on and off of the shifter shaft. While at it, I also replaced the O-ring on the dip stick tube. Good luck!

Offline Hipo giddyup

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Re: C4 shift shaft seal replacement
« Reply #7 on: November 21, 2017, 10:57:35 PM »
So the trans shop quoted me $180 to change the seal, which of course includes filter and pan gasket and new fluid. Iím opting to do this myself and will reply back with the outcome. Hopefully adding a few pics as to what is involved.
1967 Springtime Yellow Coupe, 289 2v 3spd, Metuchen built, Nov. 17th 66'
1966 Sahara Beige Coupe, 289 2v 3spd, Dearborn built, July 21st 66'
1964 1/2 Pagoda Green Coupe, 260 2v 3spd, Dearborn built, June 30th 64'
1966 GT350 Fastback clone, 289 HiPo, 725cfm Holley, 4spd, SanJose built, Nov 25th 65'

Offline 67gtasanjose

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Re: C4 shift shaft seal replacement
« Reply #8 on: November 22, 2017, 06:42:56 AM »
So the trans shop quoted me $180 to change the seal, which of course includes filter and pan gasket and new fluid. Iím opting to do this myself and will reply back with the outcome. Hopefully adding a few pics as to what is involved.

Sounds like a quote of about $125 in labor. As a repair shop owner, this sounds like they are estimating approx. 1.5 Hrs., a reasonable quote for the job.
Richard Urch

1967 (11/2/66, S.J.) Luxury Coupe, 289-4V w/Thermactor Emissions, C-4, Well Optioned
2005 (04/05) GT Premium Convertible, Windveil Blue, Parchment Top w/Med. Parchment interior,  Roush Body Appointments

Offline Hipo giddyup

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Re: C4 shift shaft seal replacement
« Reply #9 on: November 22, 2017, 02:30:27 PM »
This shop is very well liked in the area with great reviews. I've been thinking that $180.00 could fund other desirables I need on the car. Plus I'm getting a free educational class out of doing it myself.  ;D
1967 Springtime Yellow Coupe, 289 2v 3spd, Metuchen built, Nov. 17th 66'
1966 Sahara Beige Coupe, 289 2v 3spd, Dearborn built, July 21st 66'
1964 1/2 Pagoda Green Coupe, 260 2v 3spd, Dearborn built, June 30th 64'
1966 GT350 Fastback clone, 289 HiPo, 725cfm Holley, 4spd, SanJose built, Nov 25th 65'

Offline 67gtasanjose

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Re: C4 shift shaft seal replacement
« Reply #10 on: November 22, 2017, 02:39:35 PM »
This shop is very well liked in the area with great reviews. I've been thinking that $180.00 could fund other desirables I need on the car. Plus I'm getting a free educational class out of doing it myself.  ;D

No, you will spend in the neighborhood of $50 in parts, so $130 to spend elsewhere, more or less ;)
Richard Urch

1967 (11/2/66, S.J.) Luxury Coupe, 289-4V w/Thermactor Emissions, C-4, Well Optioned
2005 (04/05) GT Premium Convertible, Windveil Blue, Parchment Top w/Med. Parchment interior,  Roush Body Appointments

Offline Hipo giddyup

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Re: C4 shift shaft seal replacement
« Reply #11 on: November 22, 2017, 08:17:58 PM »
Ah-ha... but I was given 8 quarts of type F from my buddy who had the car before me. Only spent $9 for the gasket/ filter on Amazon. I also hope to have it done in under an hour.  8)

But I see where your going. Of course it could be hundreds  $$$ if I mess it up too!  Point taken
1967 Springtime Yellow Coupe, 289 2v 3spd, Metuchen built, Nov. 17th 66'
1966 Sahara Beige Coupe, 289 2v 3spd, Dearborn built, July 21st 66'
1964 1/2 Pagoda Green Coupe, 260 2v 3spd, Dearborn built, June 30th 64'
1966 GT350 Fastback clone, 289 HiPo, 725cfm Holley, 4spd, SanJose built, Nov 25th 65'

Offline carlite65

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Re: C4 shift shaft seal replacement
« Reply #12 on: November 22, 2017, 08:19:45 PM »
you won't need all 8 qts. unless you also drain the t-converter. i would drain it all but that's just me.
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Offline 67gtasanjose

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Re: C4 shift shaft seal replacement
« Reply #13 on: November 23, 2017, 10:38:09 AM »
you won't need all 8 qts. unless you also drain the t-converter. i would drain it all but that's just me.

+1

One of Ford's "Better Idea"s...the TC drain-plug that is. I usually drain it first, perhaps the night before or an hour before the rest of the job ;)
Richard Urch

1967 (11/2/66, S.J.) Luxury Coupe, 289-4V w/Thermactor Emissions, C-4, Well Optioned
2005 (04/05) GT Premium Convertible, Windveil Blue, Parchment Top w/Med. Parchment interior,  Roush Body Appointments