1979 Buick Lesabre Rear axle?Hubs Drilled? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 08-10-2006, 01:38 PM
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1979 Buick Lesabre Rear axle?Hubs Drilled?

I am grafting the front clip from a 79 Buick Lesabre on to my 54 F-100 and I might use the rear also so I can use the rally style wheels that came with the car.This is the tag on the rear 2LA-B 2.41 290 1.
Does this mean it is 2.41 rear ratio?
What rear is it and can I upgrade to a posi and lower gears?
I bought a ford 9 for it that is 3.25.It is from a 66 truck which still has the truck 5X5.5 bolt pattern.How much does it cost to get the axles drilled for the gm bolt pattern? Carl

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Old 08-10-2006, 02:37 PM
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I don't know to much about these diffs. But here is a good GM diff. code reference;

http://www.g-body.org/tnt/diffs/diff-codes.php

*found on google using keywords: GM differential tag code list reference

There were other lists available, but this is the one i've been using...


Best regards,
dB
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Old 08-11-2006, 09:57 AM
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Can't decode the tag for you, but odds are it is a standard 7.5" 10 bolt with 2.41 gears in it. Not a very beefy unit - it also is a 4 link suspension and I'm thinking your truck is leaf - mounts will be different, also you would have the overall width to measure. If you really want to do this you can get posi-trac carriers for it and the biggest numerical gear ration you can get in the 7.5" housing is 4.56. The 9" is probably your better option - no idea on what someone would charge you for drilling a new pattern (we do ours ourselves).
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Old 08-11-2006, 10:21 AM
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It does look like a 7.5 10 with 2.41. I am aware of the different mounting.I should be done welding the front clip today.I will probably just keep the nine and call around to see what it cost to get the hubs drilled.Thanks for the replies.
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Old 08-11-2006, 10:50 AM
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Moser Engineering is one of the better known companies that redrills axles and drums ... they are in Portland Indiana

Here is a price sheet for them ...
http://www.moserengineering.com/Page...pservices.html

I have used their services quite a few times ... all with good results and I am satisfied with their company.

Deuce ...
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Old 08-11-2006, 11:05 AM
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Thanks Deuce,I sold a 56 cab to a guy on ebay.They will be here in about an hour to pick it up.He said his buddy has done about half a dozen gm front clips.I am going to get him to inspect my work and I am going to ask them if there is someone local to drill the hubs.
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Old 08-11-2006, 08:52 PM
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GM B-body cars back then were available with either 7.5" or 8.5" rear ends. Bolt patterns were either 5-on-4.75" or 5-on-5". Either bolt pattern was available on either size rear end. Might see if you can find a car with the bigger pattern in a junkyard. I don't know if the rotors are interchangeable, but it might be worth a try.
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Old 08-13-2006, 01:37 AM
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Thanks for all your replies.I decided I am going to go with the Ford 9.
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