Truck Dana
Ok, before going this route, is using one in a stock car a deal breaker, from what I see the only difference is the pinion snubber pad. And if using one that only came in a car, why is the S60 allowed? I don't see the reasoning today other than keeping Ford and Chevy from using it because it came in their trucks too?
Mike |
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Many of the truck version Dana 60's have 3.250 diameter axle tubes rather than the passenger car 3" tubes. -Al
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I know of people that have turned the tubes down to 3", as they are extra thick as well.
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Maybe NHRA meant no dump truck rears. LOL |
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Roland |
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I wonder if even your local tech director would even know....
When I asked Jim Anderson about running a 2 piece driveshaft, he had to call Pomona because he and I both thought it was illegial, but no mention at all in the RB...Pomona said it was legal, so I did it. Just means I have 4 DS loops instead of 2. It allowed me to go to a driveshaft with a higher critical speed given the extreme length of a XC truck. This may be same issue...get clarification on the rule...Maybe no dually/FF rear ends? As raised above, depending on how the RB is written, would that mean that the stock trucks couldn't even use a truck axle, or just not cars? IMO using a 3.25 truck axle would be stronger (equals safer) than a 3"...granted that's pretty big already. Definitely ask your division director, and when in doubt, have them ask Pomona. |
Re: Truck Dana
Maybe the prohibition against the "truck rearends" was based on the fact that a great many of the 3/4-ton (and up) trucks used a "full-floating" axle? I know they were a popular upgrade for the circle-track folks, at least until the Frankland/Winters style became popular. The rule has been on the books forever, and probably easier to enforce than "no full-floating axles". Would be interesting to see what the Tech Department in Indy has to say!
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