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Re: what rear axle 2002 250HD
Both were possible depending on the engine option.
Both were made by AAM and both are good axles.
I wouldn't hesitate to use either one.
The LB7 Dirtymax and L18 8.1L equipped pickup trucks got the 11.5 and the Allison transmission.
The LQ4 6.0L pickups and the 2500 Suburbans got the 10.5 and the 4L80E.
In a 2500 they'll both have 8 lug hubs.
Look at the SPID sticker in the glovebox for the axle ratio RPO code.
G80 was limited slip in these years not the Eaton Gov Bomb IIRC.
You can tell right away which AAM 14bolt full floating axle it is by looking at the pinion support housing.
The 10.5" AAM Pinion Support is bolted in just like the GM corporate 14bolt it evolved from.
The 11.5" doesn't have a bolt in pinon housing.
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1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8
RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... Please include at least the year and model in your threads. It'll be easier to answer your questions.
And please let us know if and how your repairs were successful.
Last edited by hatzie; 04-23-2022 at 01:30 PM.
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