18 replies to this topic

[claysummers]

Question came up on the FBEK forum about the European origins of the Aussie marketed Opel 4spd, and whether it was based on the 4 or 6 cylinder version of the European box. Apparently there were two different versions in Europe.


Sent from my iPad using Tapatalk

[yel327]

It’s a Phillipines made box if I remember right, might be Opel in origin like the 6cyl engines in South Africa were Chevrolet design but made in South Africa.

[claysummers]

They would have been in HB? In HR they had the tin cover, then upgraded in LC to the cast cover version I am told.


Sent from my iPad using Tapatalk

[Indy Orange]

Different box in the HB Clay.Early 6 Cylinder Monaro had them in 186s and HR .Not real strong.

Edited by Indy Orange, 06 September 2025 - 10:58 AM.

[meanmachine72]

Blown a few up..
They dont like clutch
Dumps in 1st

[Indy Orange]

Rebuilt mine out of three,Input shaft seals are expensive,if you can find one.

Attached Files

•  IMG_1484.jpeg   213.72K   3 downloads

Edited by Indy Orange, 06 September 2025 - 12:29 PM.

[S pack]

Question came up on the FBEK forum about the European origins of the Aussie marketed Opel 4spd, and whether it was based on the 4 or 6 cylinder version of the European box. Apparently there were two different versions in Europe.


Sent from my iPad using Tapatalk

Exact same OPEL 4spd as used in the 1967 OPEL Kadett - B Coupe F Rallye 1.9L 4cyl, 1967 OPEL Commodore  2.5L 6cyl and 1968 OPEL GT A-L 1.9L 4cyl
 

 

[claysummers]

Thanks Dave. I’ll feed that back to Harv.


Sent from my iPhone using Tapatalk

[S pack]

Question came up on the FBEK forum about the European origins of the Aussie marketed Opel 4spd, and whether it was based on the 4 or 6 cylinder version of the European box. Apparently there were two different versions in Europe.


Sent from my iPad using Tapatalk

If they are referring to gear ratio sets as different versions then there were 3 differing ratio variants of the same gearbox in the OPEL GT 1900

 

 

The original ratio set the same as used in the LC GTR and GTR XU1.

 OPEL GT 1900 gear ratios.jpg   94.86K   3 downloads

 

Two alternative ratios sets homologated in November 1969.

 OPEL GT 1900 alternative ratios.jpg   106.67K   3 downloads

 

I may be incorrect however, I believe the above 2.87:1 ratio 1st gear transmission was the alternative LC 3100X XU1 Transmission listed in the LC XU1 Parts Catalogue (prior to the GMH XU1 specific M20 4 spd released in the CK XU1)
 

Edited by S pack, 06 September 2025 - 08:11 PM.

[claysummers]

Brilliant Dave!


Sent from my iPad using Tapatalk

[Indy Orange]

Yeah but gaskets are different.Slightly.

Edited by Indy Orange, 06 September 2025 - 09:32 PM.

[Indy Orange]

Bought a GT opel gearbox gasket set from UK ,from memory bell housing to gearbox gasket different .

[S pack]

Bought a GT opel gearbox gasket set from UK ,from memory bell housing to gearbox gasket different .

That's interesting Paul, looking at many pics of the transmissions they look to be the same. However, I did notice the OPEL GT transmission has a switch (reverse?) mounted into the drivers side rear of the case.

The Aussie version has an expansion plug in that spot.
 

[claysummers]

My mate on the FB EK forum is thinking of importing 20 gasket kits from Europe if there is any interest. He will sell them at cost to make the freight viable. Same kit as available locally at an exorbitant price.


Sent from my iPad using Tapatalk

[claysummers]

Local

https://www.ebay.com...tm/405286828985


Sent from my iPad using Tapatalk

German

https://www.ebay.com/itm/156895329399


Sent from my iPad using Tapatalk

[S pack]

Local

https://www.ebay.com...tm/405286828985


Sent from my iPad using Tapatalk

German

https://www.ebay.com/itm/156895329399


Sent from my iPad using Tapatalk

Or this kit for 58 euro from the OPEL GT Factory in the Netherlands.

https://www.opelgtpa...set-gt1900.html

[claysummers]

Yeah but, 404 - Seite nicht gefunden
Leider konnte die angeforderte Seite nicht gefunden werden, eventuell wurde eine nicht korrekte URL eingegeben. Bitte nutzen Sie unsere Suche oder wechseln Sie zu unserer Startseite.


Sent from my iPhone using Tapatalk

[S pack]

Yeah but, 404 - Seite nicht gefunden
Leider konnte die angeforderte Seite nicht gefunden werden, eventuell wurde eine nicht korrekte URL eingegeben. Bitte nutzen Sie unsere Suche oder wechseln Sie zu unserer Startseite.


Sent from my iPhone using Tapatalk

The link works for me in Firefox.

 Screenshot 2025-09-12 215755.jpg   248.83K   2 downloads
 

Edited by S pack, 12 September 2025 - 09:58 PM.

[claysummers]

Thanks Dave


Sent from my iPad using Tapatalk