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PostPosted: Thu Nov 19, 2015 11:34 am 
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Location: Vancouver, Washington
hey guys I was doing some number crunching trying to plan another luv build so I figured I would share my homework with you guys in case anyone was interested


________________________1st Gear___T-case LO____DIFF________C/R_______Change VS Stock

Stock LUV 4x4__________3.785:1_____1.870:1______4.10:1______29.019:1____+0
MSG4E-T trans

obtainable using the trooper 3rd members/gearset
Trooper 2.3/g200_______3.785:1____1.870:1_____4.30:1_____30.435____+1.476
Trooper w/2.3/g200____3.785:1____1.870:1_____4.56:1*____32.275____+3.256
MSG5E-T trans

87+ transmission
with stock LUV axles______3.767:1____2.283:1_____4.10:1______35.260____+6.241
Stock Trooper with 2.6____3.767:1____2.283:1_____4.30:1______36.980____+7.961
Stock Trooper with 2.6____3.767:1____2.283:1_____ 4.56:1*____39.216____+10.197
Stock Trooper with 2.6____3.767:1____2.283:1_____4.77:1**____41.022____+12.003
MUA5C-T trans

87+ w/aftermarket tcase gears
W/stock axles***________3.767:1_____3.070:1____4.10:1_____47.415____18.396*** biggest change with fewest parts
Trooper MUA W/3.07_____3.767:1_____3.070:1_____4.30:1_____49.728____+20.709
Trooper MUA W/3.07_____3.767:1_____3.070:1_____4.56:1*____52.734____+23.715
Trooper MUA W/3.07_____3.767:1_____3.070:1_____4.77:1**___55.163____+26.144 (nearly double the stock low, 58.03 is double)
Aftermarket tcase gears from independent4x ($650)

*Most common
**Available with 31" tire oem package
*** using stock axles and gears with a 87+ transmission with the independent4x case gears adds 18.396 or 1.577x the stock low crawl ratio.

_________________
1980 Mikado, Chevy 4.3 V6. Compcams 270HR, edelbrock intake and carb, vortec heads, s10 NV3500, stock 4.10 rear. The toy
1999 Isuzu Rodeo 4x4, 31" kumho mt's, the wife's daily driver
1993 Lexus SC400 my DD


Last edited by love4theluv on Thu Nov 19, 2015 2:52 pm, edited 1 time in total.

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PostPosted: Thu Nov 19, 2015 2:47 pm 
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Joined: Thu Jan 21, 2010 11:47 pm
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Location: Vancouver, Washington
some more homework, on tire size
this assumes stock gearing of 4.10
Tire size___Effective ratio____To maintain stock ratio
25.5_______4.10___________4.10
27________ 3.87___________4.34
28_________3.73__________ 4.50*
29_________3.61__________4.66 *
30_________3.48__________4.82**
31_________3.37__________4.98
32_________3.27__________5.15
33_________3.17__________5.31***

* between a 28 and 29" tire would net the same final drive if you were to use the trooper 4.56 third members/gears,
** there was a 4.77 as mentioned that came with the 31" oem tire package which would put you close to the 30" mark for a ratio match.
*** there are aftermarket 5.38 gears available somewhere for trooper/rodeo diffs, haven't looked into it much but that would net you additional tq over stock using 33's.
there is also an ARB air locker for at least the rodeo rears (mostly 4.30 from what I have read)... just sayin...

_________________
1980 Mikado, Chevy 4.3 V6. Compcams 270HR, edelbrock intake and carb, vortec heads, s10 NV3500, stock 4.10 rear. The toy
1999 Isuzu Rodeo 4x4, 31" kumho mt's, the wife's daily driver
1993 Lexus SC400 my DD


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PostPosted: Tue Oct 04, 2016 1:45 pm 
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da LUV masta
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Joined: Fri May 09, 2008 12:50 pm
Posts: 518
Location: Sonora, CA
Ind4x lists an air locker for the "front" Isuzu 10 bolt.
Front didn't change the gear cut, so it's just the rear put in the front.
Air locker that fits in a stock LUV rear third? If it wasn't $1k+ I'd do it.

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1980 4X4 LUV daily driver, as stock as can be.


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PostPosted: Tue Oct 04, 2016 10:25 pm 
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Joined: Tue Oct 07, 2008 8:07 pm
Posts: 826
Location: N W Arkansas
ret1614 wrote:
Ind4x lists an air locker for the "front" Isuzu 10 bolt.
Front didn't change the gear cut, so it's just the rear put in the front.
Air locker that fits in a stock LUV rear third? If it wasn't $1k+ I'd do it.

Won't work in the rear third, fronts don't use a thrust block, rears must have a thrust block to set axle bearing preload, there's no room for the thrust block in the ARB.
You can fit a Aussie/Lokka lunch-box style locker or an Impulse LSD into a rear third as long as you add the proper thrust block.

_________________
'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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PostPosted: Wed Oct 05, 2016 3:22 pm 
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da LUV masta
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Joined: Fri May 09, 2008 12:50 pm
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Location: Sonora, CA
Oops, my bad. Fogot about needing to hold the axles apart...

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1980 4X4 LUV daily driver, as stock as can be.


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