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

07-20-2008, 11:56 PM
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!!


07-21-2008, 12:21 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.

'57 Transtar Deluxe
Vancouver Island

Are you planning to attend the NW Overdrive Tour in Parksville, BC
May 23-25, 2009?</h5>

07-21-2008, 09:00 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.

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

07-21-2008, 09:08 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.

07-21-2008, 08:41 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!!