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will this rear end fit my 51???
#804959 Fri Dec 09 2011 01:45 AM
Joined: Dec 2011
Posts: 53
B
benfur Offline OP
Wrench Fetcher
First off hi everyone this is my first post. Ok now my question is I have a 51 chevy 3100 need to know if a rearend off a 1979 chevy 4x4 six lug with a measurement of 54 inch from backing plate to backing plate. Will this work on my 51. Need to know my inlaw is scraping the truck so I'm pulling off what ever parts I can use. Let me know thanks

Re: will this rear end fit my 51???
benfur #806057 Mon Dec 12 2011 05:10 PM
Joined: Dec 2011
Posts: 53
B
benfur Offline OP
Wrench Fetcher
Anyone???

Re: will this rear end fit my 51???
benfur #806061 Mon Dec 12 2011 05:21 PM
Joined: Nov 2005
Posts: 5,774
3
3B Online
Master Gabster
Hy benfur, I don't know the drum to drum measurement of a stock 51 1/2 ton, but I would grab the rear axle now and worry about fitting it later. If it turns out to be too wide you can always sell it. This subject has come up before, you should do a search for more info on this subject, hope that helps.

Re: will this rear end fit my 51???
benfur #806063 Mon Dec 12 2011 05:27 PM
Joined: Jan 2009
Posts: 107
T
Wrench Fetcher
What is the measurement of the 51 rear end compared to the 79? What are the differences in spring mount pad locations and e brake connections? Can you post a photo. The items above could help someone answer your question. I see you are in California. I suggest you call Tom at Foreign and Chevy Truck Salvage on 5th street in Santa Ana, CA. Tom really knows old and new Chevy truck rear ends and transmissions and could probably answer your question over the phone. Tom also does installation and conversion work, if you are nearby. He has done good work for me on a couple of AD trucks.


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Re: will this rear end fit my 51???
truckcamper43 #806114 Mon Dec 12 2011 09:05 PM
Joined: Nov 2006
Posts: 332
V
Shop Shark
Get a piece of 2x2 wood cut it exactly the inside width back of the drum to drum of you 51 pickup. Take it with you and you & compare it to the donor rear end, you will see right away how close you are to the original. Takes out a lot of guesswork as far as width. This may help. Good luck.

Re: will this rear end fit my 51???
benfur #811245 Thu Dec 29 2011 07:36 AM
Joined: Apr 2005
Posts: 17
K
New Guy
ill buy it from you if is reasonably cheap...oh, you in california , well maybe not but get it and keep it...kev

Re: will this rear end fit my 51???
kevin mac #811343 Thu Dec 29 2011 08:16 PM
Joined: Oct 2004
Posts: 1,864
G
Master Gabster
Check out this chart they measure from the tire mounting surface instead of the backing plate.

Another chart

Re: will this rear end fit my 51???
GMONIZ #811520 Fri Dec 30 2011 06:49 AM
Joined: Feb 2010
Posts: 86
L
Shop Shark
Chances are you will need to scarf off your old spring mounts and weld on a new set. Speedway has them cheap in there catolog. Just get out your tape mesure and go to town. Measure center to center on your springs. Then Wheel mounting surface to WMS. Then WMS to center of spring hanger. if the measure from WMS to center spring is to short on your new RR don't use it. The tires mite rub. In this case a little more is better. I don't know if you can hook a newer drive line to the older type tranny. Ask around if that is what you propose.


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