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View Full Version : Rear end replacement-help please!!



rayoung55
07-21-2008, 12:56 AM
Our '60 Lark has a 259 with a 3 speed OD trans and 3.07 gears. We live near the mountains and it has a hard time because of the gearing. I want to change it to 3.54's. I think I have found a complete rear end out of a '58 (don't know what model). I don't have a parts book for a '58 but the 59-64 that I do have shows that most 59's ran a Dana 23 so I think that's what the '58 may have. Would this be a good rear end to use or should I try to find a Dana 27 (like the car currently has) or a Dana 44?

I don't want to install a rear end that can't handle the V8.

Thanks for your thoughts!!

Rob

Mark57
07-21-2008, 01:21 AM
Everything I have read would suggest using the Model 27 differential as the minimum and if you've got a Model 44 at your disposal, that's even stronger. IMHO, I would not put a Model 23 behind a 259.

<h5>Mark
'57 Transtar Deluxe
Vancouver Island

Are you planning to attend the NW Overdrive Tour in Parksville, BC
May 23-25, 2009?</h5>
http://i186.photobucket.com/albums/x153/MarkH57/DSC00200C.jpg

52-fan
07-21-2008, 10:00 AM
All the 23s I've seen were in six cylinder cars 27s are in most 259 Larks. I find it strange that an overdrive car would have a 3.07 gear. Overdrive cars usually have very low gears in the rear end. A 3.73 would be my minimum choice for an overdrive, but if you are in mountains you might have to use the 3.54 and not plan on climbing in overdrive.

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1952 Champion Starlight, 1962 Daytona.Searcy,Arkansas
"I may be lazy, but I'm not shiftless."

Kdancy
07-21-2008, 10:08 AM
Goodness, that is high ratio for an overdrive car! That might work well on flat land. I just worked on a 58 wagon with od that had 3:31 ratio and it drove great, but not loaded with anything.
I agree that a 3:73 might be the right choice in your case.

rayoung55
07-21-2008, 09:41 PM
When I got there today the car we were looking at did have a 23 but did have the 3.54 gears. I ended up getting a Dana 44 with 3.73 gears which should work well. Thanks for everyone's input.

A special to Lotsalarks (Will) for getting me set up with the rear end and other parts!! THANKS!!