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post #1 of (permalink) Old 04-19-2002, 01:29 PM
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1981 j10 laredo axle ?

I am about to buy a 1981 j10 laredo, but I have a few questions. I have heard that from 1979 and up these experienced power losses, and they also recieved aluminum transfer cases and trannys that aren't as strong as the previouse j-trucks because of emission stuff. What axles does this truck have? Any other opinions are apreciated. thanks,
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post #2 of (permalink) Old 04-19-2002, 04:05 PM
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Re: 1981 j10 laredo axle ?

the supposed "power loss" is nothing more than a differnt rating system

there may be a slight differnce because of the smog pump or something similar, but its irrevlevant, any working smog equipment isnt costing you anything power wise.

if its an auto tranny its a TF727 ( chrysler) design and its as good as a th400.

if its a manual its probably a T176 its pretty strong, but not for huge tires, and V8 and abuse.

the rear axle will be a heavy duty AMC20 ( better than the CJ model20)

and teh front will be a driverside diff Dana 44.
the Tcase should be a np208 or 229 or something like that depepdning on what 4wheel drive option it has.

they arent quite as strong as the older Dana 20s, should be as strong as the old Qtracks, and have a better low range than the dana 20, without the special fluid required of teh Qtrack, and the 208 isnt fulltime like the QWtrack.

if its cheap anbd not rusty BUY IT

look for rust between teh driversisde frame rail and the gas tank coffin, thats a bad place for the frame to get rusty.

ozarkjeep is offline  
post #3 of (permalink) Old 04-24-2002, 02:20 AM
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Re: 1981 j10 laredo axle ?

Get underneath and look at the TAG on the t-case. If it says NP229, either look elsewhere, or consider buying another t-case. A NP228 is similar, but considerably stronger. It is a direct swap for the unreliable NP229.
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