6.0mustang

iTrader: (2)

i was told recently that for the 3rd gens they offered a 8.5" 10 bolt in them, true? i had never heard this, cant find info on it...

96lt1m6

iTrader: (31)

90-92 z28s,TAs,formula 350s came with 7-5/8 rear gears also the previous were all 7.5,also had the Dana44 option from GM/SLP which was an 8.5"
cant forget the Australian 9-bolt which is very strong but parts are $$$$$

demonspeed

iTrader: (7)

The Borg Warner 9 bolt was standard in the Tuned Port cars from 85-89. Parts are difficult to find, and they are a bit pricier. 90-92 (to 02, for that matter) used the smaller 7.65 10 bolt. I am unsure what was used 82-84.

The Dana option was only for the Firehawks I believe. There was no option for this from the factory (not a RPO).

96lt1m6

iTrader: (31)

the dana 8.5" rear was offered through GM parts and SLP i bought 2 from chevy back in 92 $1650.00

Z/YA

iTrader: (36)

The 9 bolt was in the rear disk brake cars. I had a 89 IROC with the 350 TPI

demonspeed

iTrader: (7)

Which means one will not find any cars with this rear from the factory.

Tx91z28

the d44 was also sometimes a warranty replacement also for cars that busted more than one 10/9 bolt

i'm running a d44, they came with a clutch type positrac and 31 spline axles. its considerably stronger than a ten bolt, and has a 8.5" ring gear.

the 9 bolt is only marginally stronger than a ten bolt, and with how hard parts are to find its not really worth getting one.