GTC Gearbox advice

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KJF
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GTC Gearbox advice

Post by KJF » Thu Aug 20, 2020 6:04 pm

Following a recent breakdown I've now got the gearbox out of my GTC as it would not engage gear. The problem seems to be the spigot bearing has broken up and seized onto the gearbox input shaft which was stopping the shaft disengaging from the crank giving the same symptom as trying to engage gear without pressing the clutch. I need to source the part and will replace the input shaft seal and gasket whilst the box is out as there is a slight oil misting. Can someone confirm please whether the 4 speed overdrive box is the Ford box referred to as a 'Type 5' gearbox? Thank in advance



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scimjim
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Post by scimjim » Thu Aug 20, 2020 10:53 pm

The later box is the type F. I think ford spigot bearings have probably been the same size for half a century :D


Jim King

SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), 1400 1600 1800 Zetec ST170 powered SS1 (G97), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre, TI SS1 (snotty), 1600 SS1 (C686CCR).
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

KJF
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GTC Gearbox advice

Post by KJF » Fri Aug 21, 2020 8:07 am

Thanks Jim



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GTC Gearbox advice

Post by gtcse8 » Fri Aug 21, 2020 8:49 am

Had this problem earlier this year and couldn`t source the correct bearing for my friend. :w

In the end I turned up a bush out of Phosphor Bronze.

Every one I contacted, even Burtons told me it was a common bearing used on 99% of Fords.
After buying Two which were both wrong I gave up and made my own.

The Reliant bearing is a combination of Imperial and Metric, be warned.
Not near the Old one, but can give part number later, and sizes for reference.


Mark Wilson. Garage sale everything must go. :cry:1 SE6b, 1 GTC Shell &1 SE6a shell & a Triumph Daytona. Also on YouTube :wink: lookup V8 Chevy https://youtu.be/lbpvDGAMY6g https://youtu.be/7xTrbr0ETSA https://youtu.be/K7HfYVd5Flo

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philipmasonfrance
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GTC Gearbox advice

Post by philipmasonfrance » Fri Aug 21, 2020 4:28 pm

gtcse8 wrote:
Fri Aug 21, 2020 8:49 am
The Reliant bearing is a combination of Imperial and Metric, be warned.
EEEK! How on earth did Reliant manage that? Many years ago (more than I care to remember) I worked for RHP Bearings (ex-Hoffmann, Ransome and Marles etc) in the UK and Italy and there is NO WAY they would have combined imperial and metric to create such a hybrid - unless, of course the client was prepared to pay a fortune per bearing. Hang on, when you say "bearing", is that a bearing (rolling) or bush? If the latter, I'll get my coat ...



KJF
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GTC Gearbox advice

Post by KJF » Fri Aug 21, 2020 5:32 pm

Having been out with the vernier callipers and micrometer I can confirm 19mm outer and 12.7mm inner matches up to my 1st input shaft and crank recess so I’m keeping my fingers crossed.

The other size of 21mm and the similar bronze bush that are available are both too large diameter for the crank.



gtcse8
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Post by gtcse8 » Fri Aug 21, 2020 6:26 pm

KJF wrote:
Fri Aug 21, 2020 5:32 pm
I can confirm 19mm outer and 12.7mm inner
Thanks for confirming MetrInch combination, 15mm wide IIRC
Combination of a German built engine, all metric, and an English Imperial built gearbox. :w


Mark Wilson. Garage sale everything must go. :cry:1 SE6b, 1 GTC Shell &1 SE6a shell & a Triumph Daytona. Also on YouTube :wink: lookup V8 Chevy https://youtu.be/lbpvDGAMY6g https://youtu.be/7xTrbr0ETSA https://youtu.be/K7HfYVd5Flo

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TrevorG
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Post by TrevorG » Fri Aug 21, 2020 6:59 pm

Sorry guys.....loads of metric/imperial bearings used on tractors that were Anglo/American, Anglo/German, Anglo/Italian etc. Engines were imperial, rear ends were metric and even vice versa. I've had plenty in to deal with. Try an agricultural bearing supplier perhaps?



KJF
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Post by KJF » Fri Aug 21, 2020 7:01 pm

Put simply 19mm outer, Half inch inner



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Post by IanC » Fri Aug 21, 2020 7:39 pm

TrevorG wrote:
Fri Aug 21, 2020 6:59 pm
Sorry guys.....loads of metric/imperial bearings used on tractors that were Anglo/American, Anglo/German, Anglo/Italian etc. Engines were imperial, rear ends were metric and even vice versa. I've had plenty in to deal with. Try an agricultural bearing supplier perhaps?
I used this company when I needed a non standard spigot bearing to fit an overdrive gearbox to a Jensen Healey - they were very helpful. Ian


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Post by philhoward » Fri Aug 21, 2020 9:28 pm

KJF wrote:
Fri Aug 21, 2020 7:01 pm
Put simply 19mm outer, Half inch inner
3/4” outer, 1/2” inner surely?

I’ve got a 1994 vintage Japanese gearbox here that has metric bolts and shafts yet it’s mounting bolts are on imperial pitch. Yes folks, 4 M8 bolts on a 4” by 1.5” pattern.


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scimjim
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Post by scimjim » Fri Aug 21, 2020 10:02 pm

What’s wrong with thIs one that burtons list for the Cologne engined Scimitar? Metric outer and imperial inner as fitted to Cologne engined cars from 1962 until 1987.

This is the Essex bearing with imperial inner and outer - 1965 to 1986.


Jim King

SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), 1400 1600 1800 Zetec ST170 powered SS1 (G97), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre, TI SS1 (snotty), 1600 SS1 (C686CCR).
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

KJF
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Joined: Mon May 06, 2019 1:52 pm

GTC Gearbox advice

Post by KJF » Fri Aug 21, 2020 11:18 pm

scimjim wrote:
Fri Aug 21, 2020 10:02 pm
What’s wrong with thIs one that burtons list for the Cologne engined Scimitar? Metric outer and imperial inner as fitted to Cologne engined cars from 1962 until 1987.

This is the Essex bearing with imperial inner and outer - 1965 to 1986.
That’s the one I’ve ordered Jim, along with gearbox seals and gaskets whilst it’s out



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TrevorG
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Post by TrevorG » Sat Aug 22, 2020 7:51 am

I've just added my supplier to the list....... simplybearingsltd



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Dennis Nicholas
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Post by Dennis Nicholas » Tue Sep 15, 2020 4:16 pm

philhoward wrote:
Fri Aug 21, 2020 9:28 pm
KJF wrote:
Fri Aug 21, 2020 7:01 pm
Put simply 19mm outer, Half inch inner
3/4” outer, 1/2” inner surely?

I’ve got a 1994 vintage Japanese gearbox here that has metric bolts and shafts yet it’s mounting bolts are on imperial pitch. Yes folks, 4 M8 bolts on a 4” by 1.5” pattern.
not quite Phil....3/4 as you will know is 0.05mm larger and so would most likely not fit in crank without too much distortion. 0.05mm being 0.0019685inch so not far off 2 thou interference fit. We are after all working with modern high technology vehicles with close tolerances.....not like our 30s machines... :wink:

Dennis


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