1987GN rear end check

[junkin]

Have plans to buy a 1987 posi from a guy that I don't know this weekend. Need to know what to look for as far the condition with it in a truck bed. What tells me it's a posi, how much moment in the yoke and etc. Any help will be appreciated.

 

[mikestertwo]

On the front of the passanger side axle tube it should be stamped "3TP". That is the code for an 87' 8.5" posi. Pull the cover to make sure it has a posi carrier in it.

 

[junkin]

87 rear end check

Thanks, mikestertwo

 

[turbofish38]

There's more than one code for posi/gear ratios on these rear ends. It could be a 3.73 out of a 442 or a 3.42 posi out of a 84 hot air. Here's a list out of the parts books.Some part of these 3 dogits codes will be stamped on the tube. The stars indicate posi.
3.42
GTE
GTP*
6TJ
8TJ
8TP*
2TJ
2TP*
3TP*
3TJ

3.73
6TF
8TF*
8TH*
8TF
9TR*
9TF
2TG
2TR*
3TG
3TR*

It's best to pull the cover and double check it anyway.

 

[86GNTTYPE]

Nice info to know. Thanks

 

[junkin]

GN rear end check

Thanks, Tuborfish