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Additional overdrive box for my B61

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14 years 10 months ago #8528 by HeyCharger
Ok wise ones. 8-)
I have a B61 fitted with a quad-box. The rear end bogie is off an NR Mack and has diff ratios of 9.02 (yes, 9.02) giving me a top speed of around 70kph. :-[
I just had a brilliant thought :D
What would be involved and are they available, for me to fit a 2-speed overdrive box behind the quad. ie one speed would be direct and the other would be say 0.6? A friend up in Newcastle has a B61 with 3 gearboxes.
Thoughts and suggestions appreciated. Yes, I do want to keep the NR bogie in there.
Rod.

Proud owner of;
1948 Massey Harris 44K.
1946 Ford Semi-Trailer Bus.

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14 years 10 months ago #8529 by monty
Rod,

change the diff ratios to some thing smaller, or you could install the box behind the quad box, there's a bloke on the BMT site that has one in his B model from walgett, might be a bit of a hassle have you spoken to this bloke and have you got some picks?

blokes handle is "Knobby"

i thought you could get a dollar in that thing?

-Monty ;)

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14 years 10 months ago #8530 by kennymopar2
ive a joey box out of dodge bogie drive ..but they are a 0.85 overdrive

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14 years 10 months ago #8531 by atkipete
Not sure that that Dodge joey ( maybe a Spicer) would rated to full grunt from the quad box. If you didnt put them all into low at the same time it should not be a problem.

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