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#1 |
Registered User
Join Date: Dec 2010
Location: Apison Tn
Posts: 490
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69 Custom/10 1/2 Ton rearends???
What was available off the assembly line, I know there was nothing but drums on the rear so there is no question of brakes but gears, 10 bolt, 12 bolt, dana? Posi?? Unload the knowledge guys
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http://67-72chevytrucks.com/vboard/s...d.php?t=438550 ![]() ![]() 1994 Buick Roadmaster 1994 GMC Sonoma |
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#2 |
Registered User
Join Date: Aug 2010
Location: North Dakota
Posts: 279
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Re: 69 Custom/10 1/2 Ton rearends???
Dont know about anyone elses but my 69 custom/10 1/2 ton has a 12 bolt with 3.73 gears with a factory posi in it.
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1969 C-10 LWB 388 SBC Vortec Heads 10:1 Lunati 60103 cam Weiand intake Quadrajet Carb 12 Bolt 3:73 posi 700r4 Hedman Headers 1998 Dodge Ram 1500 Reg. Cab Long Box 4X4 5.9L 183k miles 1956 Ford F-100 Longbed with Original 272 and 3OTT 1995 C1500 ECSB 6.5 Diesel 4l80e (Camper puller) 1997 Dodge 3/4 ECLB V10 (MPG machine) ![]() |
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#3 |
1969 Custom 30 wrecker
Join Date: Sep 2001
Location: Pottsville, Pa
Posts: 2,611
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Re: 69 Custom/10 1/2 Ton rearends???
My 69 C/10 short step has it's original 12 bolt 3.73 non posi still in it.
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Bob 63 Impala 283/PG/3.36 (under restoration) 66 Impala 327/PG/3.36 66 Chevelle SS 409/M22/3.55 69 Chevelle 307/PG/3.08 (future restoration) 69 C10 short stepside 454/TH350/3.73 69 Custom 30 tow truck 350/4 spd/4.10 (resto done, CRUISIN TIME!) 71 Cheyenne 20 fleetside 350/4 spd/4.10 71 Chevelle 6/PG/3.08 72 Chevelle 454/M21/4.10 |
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#4 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: 69 Custom/10 1/2 Ton rearends???
just about every C/10 ended up with a 12 bolt in it. A handfull ended up with a Dana, more GMCs than Chevy trucks did though... but still a rare find (and I hate useing that word)
As far as gearing, they came with 4.10, 3.73, and 3.07. They were all standard with certian engine/tanny options. General rule of thumb without breaking out my books... 3 speed on the column got 3.73. 4 speeds generally got 3.07 (possibly not the case on inlines, can't quite remember) Anything with a factory overdrive (rare and weak unit, only on 250 and 283/307 motors) got the 4.10 (possibly 4.11) small block with auto got a 3.07 I *think* big block with a 3 speed got 3.73... they only built a few. I know 3,07 came with the automatic with big block. This is off my memory... but I think it is pretty close. A few years worked things a little odd, but these are the generic later year guidlines. Also, there was then optional gearing. The same nubers as above, but for example if you wanted a small block with a 3.73 and an automatic... There was talk a few years ago of some GMC trucks with 3.54 gearsets in a dana rear. I have never seen documentation of these in factory lit... but it seems they made a few. Consider this the exception, not the rule. If memory serves, they were in inline powered trucks. |
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