Dana 61 ?

Runnin L8

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Just seeing what's out there.

I've got a Dana 61 with 4.1X gears and would prefer a 3.5X.

Anybody got something they want to trade or sell cheap?
 

PROSTOCKTOM

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You do know that you can get 3:07, 3:31,3:54 and your 4:10 in Dana 61 gears.

I've used several rears with 3:07 gears and really liked them.

The only set of Dana 61 gears I have are a set of 3:31's that I'm using in my Rambler project.

I can put you in touch with a guy in Oakland City, Indiana that usually has used Dana 61 gears in stock.

Tom
 

Runnin L8

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yeah... I debated between 3.5 and 3.3's, but am leaning towards 3.5's.

I'm not against a higher (lower #) gear though. Just seeing what's out there.

I also may just put it in with a 4.10 and see how it acts. I really only use the car to run 1/8 mile and cruises.

We rarely get over 20mph at the cruises, and usually trailer to the event, so a low gear really wouldn't bother me much.

I just think the car may actually slow down with that much gear.

What's the guys number and I'll give him a call. I'd almost rather keep both gear sets just in case anyways.
 

Runnin L8

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Math says a 4.1x would be ideal at 4500 RPM limit, I'm just worried it will blow the tires off in the 60'.

Guess trying it first wouldn't be the dumbest thing I've ever done. lol
 

dave brode

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Runnin L8 said:
Math says a 4.1x would be ideal at 4500 RPM limit, I'm just worried it will blow the tires off in the 60'.

Guess trying it first wouldn't be the dumbest thing I've ever done. lol

Oh, better tires needed. :devil:

I thought that you meant that the gear would slow it down.

Fwiw, for reference, my crate went high 8.4s at 80-81 at the 1/8 [12.97 at 100 in 1/4] with 4800 rpm shift point and trap rpm mild 87 octane engine with 4.10 gears.

Better engine went mid 7.30s at 92 ish at the 1/8 [11.66 at 114.8 in 1/4] with 5400 rpm shift and trap rpm with 4.30s

This calc says that to go through at same rpm in the 1/8, I would need a 5.11-1 cog in the 100 mph engine and a 5.07-1 in the other.

http://www.wallaceracing.com/calcrgr.php

Bottom line, with 4.10s, you are probably way under-geared for the 1/8.

Dave

p.s. - Edit: that is, unless it's stout enough to really mph
 

Runnin L8

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I'll have to go look at the timeslips to be sure, but I think my MPH has been running just under 90. The calculators say I should be doing closer to 94, so I would say 96-97 would be the absolute most I would be turning.

No converter slip figured, but I should be fine with a 4.1x.

Just don't know how it will launch.

I've got some questions about the Dana 61 that are making me slow to jump, but I'll start another thread on that one.
 

PROSTOCKTOM

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Ted in Olympia said:
From my memory I think the highest gears he can fit in there is 3.54.

TED
If he's using a Dana 60 then Yes a 3:54 gears is as tall as it gets, but If ends up using the Dana 61 then he can use a 3:07 or a 3:31

Tom
 

Runnin L8

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Just going to try it with the 4.10 and see what happens. Still pondering on the ends. It is a good width now, so if I can get a wheel that works it may stay 8 lug.
 

Ted in Olympia

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I had a 61 in my 76 Ford Van with 3.07 gears. I found a posi for it with 4.10 gears and when I tried to switch it over the R&P were a 1/4 inch away. But the weird thing is that I was able to use the posi with the 3.07 gears just fine, so this is the way it went together.

TED
 
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