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Old 02-05-2011, 11:06 AM   #1
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1981 Winnie GM chassis Salisbury rear end gears

Many might have seen me inquiring in another thread about a diesel swap for my 1981 20' Winnie Warrior.While that is still in the investigation stages,I wanted to see what I could find out about getting a different rear end ratio for it.Weither it be a diesel or a upgraded 350 with a 4L series GM tranny,that is important info to know.Guys-Gear Vendors O/D is not going to be considered for this M/H.

I did a search for rear end gears for a 1981 Salisbury rear end.It showed me Camero rear end gears which I think is all wrong. Could anyone please post a link for different gear ratios for this rear end??.

What is in the M/H now is 4.10's with 16.5 tires.The upgrade version for a H/M with the same 125" wheel base is 4.56's with a 454 and dual rear wheels and 19.5 tire/rim.I was told when I bought the 16.5's that they where not sure how long that size was going to be available.That the updated tire/rim would be a 16".I think the same holds true for the 19.5 and I am not sure if that would mean the updated tire/rim would be 19" or 20".

The basis for this post is to find a selection of rear gears and a inquiry about the larger tire/rims.Sure would be cool to find a donor rear end from whatever source for a dual tire rear end that fits it with with a gear ratio selection I could buy.

This is not something I am going to start tomorrow,but a serious look at a plan that once it is formulated I will follow when I start it and will have a thread with pic's attached to it.

Once Again Guys,

Please and Thank You Very Much,


Gary
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Old 02-05-2011, 12:40 PM   #2
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You have a truck rear end, you can ID it by the amount of bolts holding the pan on. You can ID the unit by using this site.
GM 10.5 14 Bolt Ring & Pinon Set plus differential parts. You save money! - Drivetrain.com
J
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Old 02-05-2011, 08:53 PM   #3
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tires and gears

i just did the tire swap last month went from 8.75 -16.5 to 235 -85 -16s, my rig fell just barely into the hub piloted age.
the 235/16s lowered my tire revs per mile by 50 revs per mile not a lot but should help with fuel mileage a bit.and also they are rated at 3042 lbs each much better then the 16.5s
16.5s are still around both firestone and goodyear sell them,in my neck of the woods about $200.00 a pop but they have to order them in.
a 225-75-16 is slightly smaller then the 8.75/16.5s if you have the room the taller tire will help in the gear ratio.
look on line there are web sites with pics of all different rearends that will help you identify yours but i would hazard a guess that 4.11 is the highest gear offered as the big rear ends are geared toward work trucks you might be able to find something out of a later diesel dually with gears into the 3s but I'm just guessing on that.
the easiest way would be a gear vendors overdrive unit but they are very pricey new i don't know about out of a rv salvage? i'm thinking about doing some digging into this when i get time it's out of my price range right now.
keep after it though would way cool if you can get it your swap to work.

best wishes frank,cricket and harley the dog
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Old 02-05-2011, 10:32 PM   #4
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I know it has 4.10's.What I am asking about is 3.73's and maybe 19' or 20' tires along with a increase in torque either with a diesel or re-doing the gas 350 SBC.Looking at the 4L series trannies with a heavy duty rebuild and a stand alone program if using the gas engine.
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Old 02-06-2011, 07:05 AM   #5
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Extreme Axle Sales (Extreme Axle Sales) offers a 3.73 for the GM 14 bolt which I'm thinking is the axle under your rig. The price is $272. On the out side chance it's a Dana 80 there's a site that offers gear sets as high as 3.54 for them, but you most likely have the 14 bolt.....
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Old 02-06-2011, 08:21 AM   #6
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Wow guys thanks for the ref's.
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Old 02-06-2011, 11:43 AM   #7
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Quote:
Originally Posted by fleamarketer View Post
I know it has 4.10's.What I am asking about is 3.73's and maybe 19' or 20' tires along with a increase in torque either with a diesel or re-doing the gas 350 SBC.Looking at the 4L series trannies with a heavy duty rebuild and a stand alone program if using the gas engine.
The one thing you could do is purchase a great after market block with the MUCH larger bore and toss in a stroker kit, With the new blocks you might be able to slip in a 3.8750 crank instead of the standard 3.750 crank (400 crank).
The cubic inches are going to be anywhere from 415 to 427 at least and with a decent torquer cam along with some good breathing heads it would be one torque monster.....
A 4L80e should be able to handle that engine but I would still beef it up a dab....

Jim
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