code question

olds1968 · 01-12-2008, 06:07 PM

i was looking at my rear end (type o) today after changing the gear oil that looked like it hasnt been changed for 40 years. it looked like nobody has messed with the gears and i counted the teeth on the ring(39) and pinion(14). then found these letters and numbers on the axle.

SA
-177-
394139
CFD 8

can anybody tell me what they mean?

88 coupe · 01-12-2008, 10:42 PM

39 ÷ 14 = 2.785 = 2.79:1 rear end gear ratio.

Norm

olds1968 · 01-14-2008, 02:22 PM

does anybody know anything else about the other numbers?

marcar1993 · 01-21-2008, 11:57 AM

Probably just casting numbers that tell you where/when it was cast.

01-12-2008, 06:07 PM	#1 (permalink)
olds1968 member Join Date: Dec 2007 Location: charlotte, nc Posts: 25	code question i was looking at my rear end (type o) today after changing the gear oil that looked like it hasnt been changed for 40 years. it looked like nobody has messed with the gears and i counted the teeth on the ring(39) and pinion(14). then found these letters and numbers on the axle. SA -177- 394139 CFD 8 can anybody tell me what they mean?

01-12-2008, 10:42 PM	#2 (permalink)
88 coupe Junior Member Join Date: Oct 2004 Location: Southern CA Posts: 712	39 ÷ 14 = 2.785 = 2.79:1 rear end gear ratio. Norm __________________ I love the reaction when they find out it's not a Big Block Chev . . . . . . . It gets even better when they find it's all Olds.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
paint code for 68 F-85	72 Supreme	Chassis/Body/Frame	2	07-06-2007 05:46 PM
engine code help	shaks 442 clone	Big Blocks	7	05-01-2007 08:10 PM
scanner code 13	SX455	442	1	04-09-2007 07:15 AM
paint code	SX455	Cutlass	1	02-01-2007 06:57 PM
car code.	Joel n	Eighty-Eight	2	11-25-2006 08:06 PM

01-14-2008, 02:22 PM	#3 (permalink)
olds1968 member Join Date: Dec 2007 Location: charlotte, nc Posts: 25	does anybody know anything else about the other numbers?

01-21-2008, 11:57 AM	#4 (permalink)
marcar1993 Senior Member Join Date: Apr 2007 Posts: 112	Probably just casting numbers that tell you where/when it was cast.