over drive

While I'm finding out so much thought I'd ask...

What does the overdrive unit look like and where is it situated on the gearbox. Anyone got a pic.

thanks,

Tom
 
The overdrive is the bit bolted onto the back of the gearbox, takes the place of the tail casting on a normal box.

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Nope, the prop needs shortening.
Correction - the overdrive takes the place of the tailshaft casing, and a bit of the prop:)

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Are these transmissions the same as on the Hillman Hunters? or what other vehicles use the same box?.


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www.commervanoztour.blogspot.com
 
Same box but different bell housing and input shaft. That picture was taken a long time before Harvey was on the road, hence the cleanliness :I, and before I swapped the bell housing and input shaft from a Commer box. Trouble is the gear wheel on the input shafts are different - I found that out later after it shed it's teeth:( So best going for an earlier, non-Arrows series one, as it goes straight on as used on Rapiers, Sceptres and Alpines:)

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But you still need to shorten the prop. Also be aware that some boxes had coarse splines on the input and output shaft and some had fine splines - some had a combination of both. Just make sure you have the right prop to fit the splines on the output shaft, it's just a matter of using a different clutch plate if the input end is different to what you already have.

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