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 Post subject: rear diff sizes
PostPosted: Sat Oct 05, 2013 7:25 am 
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i just bought a 1975 chevy mikado LUV manual. i have been trying to find out the rear diff size. iv looked up the vin at gm lol there records dont go back that far ig lol. im at a loss. my project will to make it into a drag pickup lq408, 80mm turbo, 4l80 ect.


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 Post subject: Re: rear diff sizes
PostPosted: Sat Oct 05, 2013 2:43 pm 
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Location: North Mississippi
Do you mean the rear gear ratio? 1975 was 4.56:1


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 Post subject: Re: rear diff sizes
PostPosted: Sat Oct 05, 2013 4:11 pm 
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Does not matter what it has now, it won't hold up to what you have planed.

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 Post subject: Re: rear diff sizes
PostPosted: Mon Oct 07, 2013 8:12 pm 
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well if it has a 8.5 rear dif it should hold pretty well! they r a front style load rear end like a ford 9in! every person iv talked to has no clue lol so im finding it interesting


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 Post subject: Re: rear diff sizes
PostPosted: Mon Oct 07, 2013 8:18 pm 
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Off the top of my head I can't tell you the size but I can tell you it will not hold up at all with what you are planning.

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 Post subject: Re: rear diff sizes
PostPosted: Mon Oct 07, 2013 8:35 pm 
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I have grenaded many with less motor than that. Just saying...
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 Post subject: Re: rear diff sizes
PostPosted: Mon Oct 07, 2013 8:46 pm 
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lol well hopefully it kinda will till i get half way setup! maybe with a electric diff and mega squirt i can control the launchtill i can get or find a 12 bolt or ford nine. have lots of parts to get and tear down and build! wat do u have done to yours


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 Post subject: Re: rear diff sizes
PostPosted: Mon Oct 07, 2013 8:49 pm 
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Nine inch. Please film the first launch for us, we really want to see a stock rear end oil down the track lol.

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 Post subject: Re: rear diff sizes
PostPosted: Mon Oct 07, 2013 8:54 pm 
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lol might have to just do that for fun


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 Post subject: Re: rear diff sizes
PostPosted: Mon Oct 07, 2013 9:01 pm 
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ill just do it on the street dont want to take time away from ppl on the track lol


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 Post subject: Re: rear diff sizes
PostPosted: Mon Oct 07, 2013 9:04 pm 
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ill leave the track for the zl1 till the luv is done. what do u have all done to your luv luvr8


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 Post subject: Re: rear diff sizes
PostPosted: Mon Oct 07, 2013 11:21 pm 
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Location: Camarillo, CA
406, 9 inch, tubbed with 31X18.5X15, just a street truck. Mytmouz would make my truck look like it's going backwards if we ran.

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 Post subject: Re: rear diff sizes
PostPosted: Tue Oct 08, 2013 9:04 am 
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Stock '75 LUV rear axle assembly was an Isuzu Corporate 10-bolt (the number of ring gear bolts) with a 7.64" ring gear & 17-spline axles. It is a "banjo" or Hotchkiss type with a removable 3rd member. It is about the same strength, possibly a bit more than a GM 7.5"-7.625" 10-bolt or a Dana 30. They won't hold up to serious horsepower, plus there are no aftermarket goodies like gears, lockers & LSDs available. Stock ratio in '75 was 4.56, of the other factory gears 4.10s are the most readily available alternate, 3.42s & 3.73s are rare, 3.90s are extremely rare, so dialing in the correct gear ratio is also a problem. If you break it only factory parts fit & the only source is a salvage yard.
So now you know what your truck has for a rear end and why everyone has been telling you that you need something stronger.

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'78 Chevy LUV,1.9,4sp,headers,31's,SAS Dana 30,Dana 20,SOA rear w/Aussie Locker, rough body, bought new 12/4/78.
'87 Trooper,2.3,5sp,headers,31's,ball joint flip & spacer,Aussie Locker rear,Superwinch hubs,brush guard w/5.5K winch,more to come.


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 Post subject: Re: rear diff sizes
PostPosted: Tue Oct 08, 2013 6:41 pm 
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wow thanks that finaly explains allot and ya def a 9in is a must thank u luv masta. your truck still has to get and move pretty well man and looks very nice luvr8. thanks for all the input guys ill tag pics as thw build progresses!


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 Post subject: Re: rear diff sizes
PostPosted: Tue Oct 08, 2013 7:18 pm 
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See, all us V-8 guys just only it won't work, the guys who keep the 4 cylinders alive know much more then us when it comes to the stock stuff, what works in its place etc. Truth is in my opinion it's harder to keep the 4 cylinders alive, figuring out what other parts will work then cutting up the truck and adding a small block.

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 Post subject: Re: rear diff sizes
PostPosted: Wed Oct 09, 2013 5:34 am 
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Luvrv8 wrote:
See, all us V-8 guys just only it won't work, the guys who keep the 4 cylinders alive know much more then us when it comes to the stock stuff, what works in its place etc. Truth is in my opinion it's harder to keep the 4 cylinders alive, figuring out what other parts will work then cutting up the truck and adding a small block.


All truth right there . As for rear axles , build a 9 inch or chase the ever elusive S-10 8.5 10 bolt .


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 Post subject: Re: rear diff sizes
PostPosted: Wed Oct 09, 2013 11:43 am 
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Location: Pelahatchie, MS
Or an exploder 8.8 with 2 short axles...

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 Post subject: Re: rear diff sizes
PostPosted: Fri Oct 11, 2013 9:00 pm 
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im guna have a 9in nodular made with a 4 link. what do u guys think is the best way to setup turbos. front or rear. iv got so many? s for u guys that have done v8 swaps! chasis, engine bay, coil over, lol


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 Post subject: Re: rear diff sizes
PostPosted: Fri Oct 11, 2013 9:02 pm 
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Front turboes will be a pain due to lack of room...

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 Post subject: Re: rear diff sizes
PostPosted: Sat Oct 12, 2013 10:15 am 
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I would have to agree with turbos in the back unless you plan on setting the cab back some.

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