GTC Manual Gearbox removal

Moderators: scimjim, Roger Pennington, philhoward, Lukeyboy46, erikscimitardemon

Alan_GTC
Posts: 44
Joined: Tue Jun 05, 2012 7:20 pm

GTC Manual Gearbox removal

Post by Alan_GTC » Sun Sep 23, 2018 11:28 am

Am looking at getting the gearbox overhauled during the winter on my GTC (manual).

Have got the Autobooks manual which gives some basic instructions on removing the gearbox - so my question here is what have others experienced and what guidance would you offer to anyone looking to remove the gearbox - what are the 'gotchas' to expect, what are the surprises which the Autobooks manual doesn't tell you? All those kind of things really.

Thanks in advance.



User avatar
TrevorG
RSSOC Member
Posts: 785
Joined: Fri Aug 24, 2012 9:09 am
Location: Thomas chapel in Pembrokeshire

GTC Manual Gearbox removal

Post by TrevorG » Sun Sep 23, 2018 4:48 pm

Hi Alan, I'm sure wiser people here will come back to you re removing the gearbox without engine, I'm just about to with engine on my gte albeit an essex engine, but chassis basically the same. Unless you have seeping oil into the cross members and prop shaft, wd40 them asap as the bolts can corrode with road dirt/salt etc. I've just spent all day on getting mine out! Feeling bruised and sore.



User avatar
AJL Electronics
RSSOC Member
Posts: 8324
Joined: Fri Oct 17, 2008 8:49 pm
Location: Gloucester
Contact:

GTC Manual Gearbox removal

Post by AJL Electronics » Sun Sep 23, 2018 7:00 pm

TrevorG wrote:
Sun Sep 23, 2018 4:48 pm
wd40 them asap
What will a Water Dispersant achieve? I would recommend a penetrating / releasing oil. Commercial options include PlusGas and GT-85. Better and cheaper is a mix of acetone and ATF mixed 50:50. Diesel will also be of some assistance if handy.


Yes, we can mend your Scimitar!
Order your Scimitar parts any hour of the day at http://www.classicmicrocars.com (member's discounts).

Fancy a holiday in Gael, France? http://www.ianrhu.com

There is no point trying to teach a pig to sing. It doesn't work and it annoys the pig.

User avatar
philipmasonfrance
RSSOC Member
Posts: 550
Joined: Tue Dec 19, 2006 2:42 pm
Location: Var, Provence, France

GTC Manual Gearbox removal

Post by philipmasonfrance » Tue Sep 17, 2019 3:54 pm

How did you get on, Alan? I was searching the forum, found your question and thought "Brilliant - that's just what I need to know" Sorry, lads, but the replies weren't really that helpful - apart from confirming the bit about removing the cross-member. So, first question - is the gearbox easy to separate from the Cologne engine if you just want to drop the box? If not, second question - is the combined engine and gearbox as "easy" to remove as the Essex from the GTE? We recently took the Essex engine and gearbox out of son James' Coupé, which wasn't TOO bad!



User avatar
scimjim
RSSOC Member
Posts: 40567
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester

GTC Manual Gearbox removal

Post by scimjim » Tue Sep 17, 2019 4:36 pm

Cologne is much easier to remove with box compared to the Essex - simply because of the extra room around the exhaust manifolds.


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

User avatar
philipmasonfrance
RSSOC Member
Posts: 550
Joined: Tue Dec 19, 2006 2:42 pm
Location: Var, Provence, France

GTC Manual Gearbox removal

Post by philipmasonfrance » Sat Feb 01, 2020 8:21 am

For Christmas I was given a gearbox jack! So I'm going to try dropping the gearbox out. Obviously remove bearer, disconnect prop-shaft, overdrive/reversing light connectors, speedo cable, then bolts from the bell-housing (I assume). Unless there is a better way? How many bolts to split from the engine end? Is there an idiot's guide anywhere? I didn't find one in the "How to" section - so does this mean even an idiot will find it easy?



User avatar
Geraint SabreGTCse5
RSSOC Member
Posts: 1229
Joined: Wed Dec 20, 2006 7:27 pm
Location: North Wales

GTC Manual Gearbox removal

Post by Geraint SabreGTCse5 » Sat Feb 01, 2020 8:56 am

I have attached a picture of my GTC bell housing which shows the bolts, sorry its not a great pic I still can't lift anything. I assume you have removed the starter and the clutch slave, the engine itself will need supporting at the gearbox end before the two are split. They can take some effort to separate.
Attachments
P1030131.JPG
P1030131.JPG (362.55 KiB) Viewed 1207 times


Geraint

Sabre ti ti, SST,se5, GTC, 6b.......

Better to be late in this life than early in the next!

User avatar
philipmasonfrance
RSSOC Member
Posts: 550
Joined: Tue Dec 19, 2006 2:42 pm
Location: Var, Provence, France

GTC Manual Gearbox removal

Post by philipmasonfrance » Sat Feb 01, 2020 9:23 am

That's excellent! Many thanks, Geraint. I haven't started yet (too much to do on the house at the moment), but I like to give any project plenty of thought before tackling it. I can now see that the clutch comes off with the gearbox; hence the need to detach the slave cylinder and starter motor. I have a couple of trolley jacks so can use one of those to support the engine.



User avatar
AJL Electronics
RSSOC Member
Posts: 8324
Joined: Fri Oct 17, 2008 8:49 pm
Location: Gloucester
Contact:

GTC Manual Gearbox removal

Post by AJL Electronics » Sat Feb 01, 2020 10:49 am

Whilst in there, change the core plugs under the backplate. Ideally do the lot and my preference would then be engine and gearbox out as a unit. Far, far easier to realign the clutch with engine, than in the car. You can do all the core plugs and check the bottom end bearings then too.


Yes, we can mend your Scimitar!
Order your Scimitar parts any hour of the day at http://www.classicmicrocars.com (member's discounts).

Fancy a holiday in Gael, France? http://www.ianrhu.com

There is no point trying to teach a pig to sing. It doesn't work and it annoys the pig.

gtcse8
RSSOC Member
Posts: 3121
Joined: Fri Apr 24, 2009 10:11 am
Location: Steeton, Yorkshire Dales

GTC Manual Gearbox removal

Post by gtcse8 » Sat Feb 01, 2020 1:38 pm

Phil drain the gearbox first, and then run the car with the rear wheels off the ground and go through the gears with the OD operating.
This will purge the oil inside the OD unit and will prevent it running all over when you remove prop shaft and finally the box.
Then drain whats made its way back into the box overnight at least, it gets everywhere does that oil stuff. :wink:

Been there etc etc etc :roll:


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

User avatar
philipmasonfrance
RSSOC Member
Posts: 550
Joined: Tue Dec 19, 2006 2:42 pm
Location: Var, Provence, France

GTC Manual Gearbox removal

Post by philipmasonfrance » Sat Feb 01, 2020 6:38 pm

AJL Electronics wrote:
Sat Feb 01, 2020 10:49 am
Whilst in there, change the core plugs under the backplate. Ideally do the lot and my preference would then be engine and gearbox out as a unit. Far, far easier to realign the clutch with engine, than in the car. You can do all the core plugs and check the bottom end bearings then too.
But my wife will NEVER forgive me if I don't use her Christmas present to me!! :(



User avatar
philipmasonfrance
RSSOC Member
Posts: 550
Joined: Tue Dec 19, 2006 2:42 pm
Location: Var, Provence, France

GTC Manual Gearbox removal

Post by philipmasonfrance » Sun Feb 02, 2020 10:35 am

Does Geraint, or anyone, have the overall height of the bell housing? I'd hate to drop the box - and find I haven't got the car high enough to give clearance!



User avatar
Geraint SabreGTCse5
RSSOC Member
Posts: 1229
Joined: Wed Dec 20, 2006 7:27 pm
Location: North Wales

GTC Manual Gearbox removal

Post by Geraint SabreGTCse5 » Sun Feb 02, 2020 11:27 am

photo of height, just take care when removing because as shown in the second photo the drive shaft is longer the the bell housing.
Attachments
P1030132.JPG
P1030132.JPG (187.41 KiB) Viewed 1061 times
P1030134.JPG
P1030134.JPG (240.4 KiB) Viewed 1061 times


Geraint

Sabre ti ti, SST,se5, GTC, 6b.......

Better to be late in this life than early in the next!

User avatar
philipmasonfrance
RSSOC Member
Posts: 550
Joined: Tue Dec 19, 2006 2:42 pm
Location: Var, Provence, France

GTC Manual Gearbox removal

Post by philipmasonfrance » Sun Feb 02, 2020 12:13 pm

Brilliant, Geraint! So 40cms minimum to clear. Shouldn't be a problem with a combination of ramps and axle stands, we can probably get a good 20", maybe more. Using my other Christmas present, a body trolley (can't remember the proper name), son James should have NO problem! I shall stand by to pass him the necessary tools!



User avatar
GavinR
RSSOC Member
Posts: 566
Joined: Wed Dec 01, 2010 11:31 pm
Location: Bristol

GTC Manual Gearbox removal

Post by GavinR » Mon Feb 03, 2020 1:30 pm

I would start with the car at a sensible working height, enough to slide underneath and undo bolts, etc, then slide backwards on the gearbox jack

Once it is free, then raise the car high enough to get the gearbox out - if you can get enough height to keep it on the gearbox jack then it makes everything a lot easier, and the same when going back in


GavinR
RSSOC Member 3513
1971 SE5a
1970 SE5 Project

Post Reply

Return to “Se6/6a/6b/GTC”