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Commer Box

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15 years 10 months ago #2052 by GM Diesel
Commer Box was created by GM Diesel
Hello All, Who made the 6 speed synchro O/D gearbox from the Dodge D3F's or "Commer box" they are sometimes reffered to ?
Out of a dodge they have an SAE 3 pattern (Perkins 354) and out of the Commer (Knocker) they are SAE 2.
Barry
GM Diesels - Converting diesel into noise since 1938.

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15 years 10 months ago #2053 by kennymopar
Replied by kennymopar on topic Re: Commer Box
apart from the comers i think the 6 speed were only fitted to the D3F "650" series..ive a D3F 600 series in my driveway but its not a 6 speed ..are they a pommy built "CUK" box ? im guessing comer UK?

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15 years 10 months ago #2054 by GM Diesel
Replied by GM Diesel on topic Re: Commer Box
Hello, I have no idea who made them. Ive been told Turner made them and have also been told Clark made them.
Barry
GM Diesels - Converting diesel into noise since 1938.

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15 years 10 months ago #2055 by kennymopar
Replied by kennymopar on topic Re: Commer Box
im no expert on gearboxes they could be a turner O/D box ..but i know the larger dodge/comer boxes were UK sourced..they arnt so easy to find nowadays the wreckers usually ask $1200+

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15 years 10 months ago #2056 by GM Diesel
Replied by GM Diesel on topic Re: Commer Box
I have used the six speed behind all sorts of engines over the years but have never had to get parts for them hence never finding out what they really are.
GM Diesels - Converting diesel into noise since 1938.

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15 years 10 months ago #2057 by kennymopar
Replied by kennymopar on topic Re: Commer Box
are you after a 6 speed?
i wish my AT4 had a 6 speed(90km/h top speed with a 361 V8)..but im going the joey box route

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15 years 10 months ago #2058 by GM Diesel
Replied by GM Diesel on topic Re: Commer Box
I have a couple Ive picked up and one needs some synchro parts. They are a great box being synchro and a tall 76% overdrive for the C and D series inters. They are physically a big heavy box though and need a rear mount if they are used with an Inter clutch housing.
Do you know what model joey you have ? Barry
GM Diesels - Converting diesel into noise since 1938.

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15 years 10 months ago #2059 by Andy Wright
Replied by Andy Wright on topic Re: Commer Box
Baz, Howard Pettigrew in NZ might be able to help. He has a lot of documentation on Commer gear and anything mildly related.
Andy&&&&Whatever rubs your buddah.&&&&Got Bedfords? http://bedfordtr

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15 years 9 months ago #2060 by kennymopar
Replied by kennymopar on topic Re: Commer Box
my joey is a spicer 5831B ..as fitted to the dodge AT4 tandems when fitted with the 361 V8(0.85 overdrive)..havnt fitted it ..but when i do it will be used as a constant overdrive as the truck already has a 5 speed box 2 speed diff ..just the diff ratios wernt made for 110km/h way back then

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15 years 9 months ago #2061 by GM Diesel
Replied by GM Diesel on topic Re: Commer Box
The dodge should get along nice with the OD. It'll make a difference with your fuel to which these days is a big deal. Barry
GM Diesels - Converting diesel into noise since 1938.

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