20 replies to this topic

[limo]

I think it would be easier and quicker to see a pic of the actual gearbox / bell housing and shifter.

[Bigfella237]

According to the LC parts cattledog, 7211158 is a "CASE - Transmission" for "VEHICLES EQUIPPED WITH 1600 4 CYLINDER ENGINES"

 

[limo]

Vauxhall not Opel

[limo]

that's an Opel for six

[Ice]

do you think it will be good for my 161 s gtr?

Yes

[71xu1]

Does it have a cast pan or pressed tin?

[limo]

that's what I have in my GTR

was standard for GTR and XU1 until 7/71

bottom plate looks thick so probably cast

[bat 53]

my lc gtr is a 6/71 has aussie 4 speed 

[S pack]

I am eplying to this older post. 

 

Am I right, the Opel 4 speed manual gearbox was only used in the LC 6 cylinder Torana?

An Australian built gearbox replaced the Opel gearbox in the LJ 6 cylinder Torana?

The Opel gearbox was a stop gap unit used until the Austalian designed unit came along?

The Opel 4spd was initially offered in the HR Holden, followed by HK, T & G 6cyl passenger vehicles and subsequently the LC Torana 6cyl models.

Around the start of July 1971 the Opel 4spd (option code M20) was replaced by the the Australian built M20 4spd transmission in LC Torana 6cyl right hand drive models. Production of HG passenger vehicles had ceased by this time.

The Opel 4spd continued to be used in Australian assembled LC and LJ left hand drive 6cyl models.
 

Edited by S pack, 14 December 2020 - 05:45 AM.

[yel327]

I don’t think it is even an “Opel” box. Maybe Opel design is a better term. AFAIK they were built in the Phillipines for Asian vehicle use. Probably saved GMH a few $ per box over the US built Saginaw which was what was used standard in 6cyl HK and HT commercials. If the Saginaw had been comparable cost that probably would have been used in LC XU1 and 6yl HK-HG.

[S pack]

GMH refer to it as an OPEL 4 spd transmission in the August 1971 dealer service letter.

I remember another dealer service letter about a production change to the bellhousing for HR Holden fitted with the OPEL 4 spd transmission.

I have a vague memory of reading somewhere that the OPEL 4spd was assembled in the GM Philippines facility where they assembled Chevrolet, Opel and Holden (Torana)

Reading between the lines I'd reckon most of the gearbox components were produced by OPEL and CKD to GM Philippines. 

[yel327]

Or it’s like GM South Africa. They built Chevrolet design engines, transmissions and rear axles to increase the local content, for installation in Holden vehicles they assembled as Holden or Chevrolet vehicles. In reality not that much different to TH180 boxes built here as Trimatic or Buick design engines built here for Holdens. I reckon it’s Opel design, produced in the Phillipines. Might be some imported content.