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12-28-2010, 01:36 AM
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#1 |
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Registered User
Join Date: Mar 2002
Location: Forney TX
Posts: 4,512
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one ton rear?
Any idea what rear end would be in a 86 one ton with a BBC/4 speed? Im debating on swapping rear gears to go down the road alittle better. A gear swap Is cheaper then the transmission option. I was looking at going 5 speed until I priced the nv4500 with pto...OUCH! Here the truck is on the trailer after being stuck 45 miles from home from a stupid $5 switch.
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Troy 1965 Chevy Bagged,361 sbc,voodoo cam,1.5 full roller rockers,patriot 185cc vortec heads 2.02-1.60,vortec weiand polished intake,demon carb my truckhttp://67-72chevytrucks.com/vboard/s...d.php?t=332884 Big Red Dog build http://67-72chevytrucks.com/vboard/s...d.php?t=572274 |
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12-28-2010, 05:58 AM
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#2 |
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Watch out for your cornhole !
 
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: one ton rear?
That truck is a cab and chassis truck. It will have a 14 bolt rearend. Randy's Ring and Pinion carries 3.54 gear sets for them. Also good news is that the 14 bolts are far and away the easiest ones to setup gear sets in.
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12-28-2010, 07:29 AM
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#3 |
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Senior Member
Join Date: May 2004
Location: Binghamton, NY
Posts: 3,469
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Re: one ton rear?
They do not make a 3.54 for a 14ff, closest made is 3.42s.
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2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 4” SAS 1999 GMC Yukon 350/4L60 6" SAS |
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12-28-2010, 07:49 AM
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#4 |
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Watch out for your cornhole !
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: one ton rear?
He's right. I remembered that wrong. Randy's has a good choice of gearsets though.
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I'm on the Instagram- @Gearhead_Kevin |
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12-28-2010, 10:34 AM
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#5 |
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Registered User
Join Date: Jul 2010
Location: Georgetown, KY
Posts: 183
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Re: one ton rear?
Are you going to be working the truck, or mostly just driving it around?
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Andrew 1987 V20 Scottsdale 383 TBI, SM465, NP208, 14FF, 4.10 1988 C1500 Scottsdale 305, 700R4, 3.08 1986 K30 Custom Deluxe 6.2, SM465, NP205, 14FF, 4.10 |
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12-28-2010, 11:28 AM
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#6 |
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Registered User
Join Date: Mar 2002
Location: Forney TX
Posts: 4,512
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Re: one ton rear?
It will get used but I don't think it needs that much gear so I can at least drive 65 down the highway without the motor howling at me. I can lug around in 4 gear and cruise 30 mph with no problems. I just want a little more drivability with it. The most it will haul running the highway is my 4k skid steer and maybe 1000 lbs of dirt or rock. Most of the time it will be empty running back and forth from the job.
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Troy 1965 Chevy Bagged,361 sbc,voodoo cam,1.5 full roller rockers,patriot 185cc vortec heads 2.02-1.60,vortec weiand polished intake,demon carb my truckhttp://67-72chevytrucks.com/vboard/s...d.php?t=332884 Big Red Dog build http://67-72chevytrucks.com/vboard/s...d.php?t=572274 |
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12-28-2010, 12:40 PM
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#7 |
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Registered User
Join Date: Dec 2010
Location: Visalia, Ca
Posts: 707
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Re: one ton rear?
assuming it has 4.10 gears the only choice in between would be 3.73 I believe
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<Brandon> 1974 Chevrolet K5 Blazer 350sbc/SM465/NP205, dana44 front, corp 14bolt rear with 4.10s and a powertrax locker, custom rear bumper 400sbc in the works.  1981 GMC C1500 stepside 250i6, 3spd, 12bolt with 3.08s 2.5/4drop on 15x10 with 275/50r15 81 GMC C3500 cab-chassis dually with utility bed 350sbc, Sm465, 14bolt with 4.10s nv4500 getting ready to go in 1979 Chevrolet K5 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434096 1976 Chevrolet C10 R.I.P. http://67-72chevytrucks.com/vboard/s...d.php?t=434195 |
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12-28-2010, 02:07 PM
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#8 |
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Registered User
Join Date: Mar 2002
Location: Forney TX
Posts: 4,512
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Re: one ton rear?
Yea they go from 373 to 410. I think the 373 would be fine. I will try to look and see if my rear has a tag or something that says.
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Troy 1965 Chevy Bagged,361 sbc,voodoo cam,1.5 full roller rockers,patriot 185cc vortec heads 2.02-1.60,vortec weiand polished intake,demon carb my truckhttp://67-72chevytrucks.com/vboard/s...d.php?t=332884 Big Red Dog build http://67-72chevytrucks.com/vboard/s...d.php?t=572274 |
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12-28-2010, 06:25 PM
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#9 |
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Registered User
Join Date: Jul 2010
Location: Georgetown, KY
Posts: 183
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Re: one ton rear?
With 4.10's you'll be turning around 3k RPM at 65. If you were running 55 mph loaded with 4.10's you'd be around 2600 RPM, with 3.73 gears and the same speed would turn about 2400 RPM. If you're going to be working at all with it I wouldn't go any lower than 3.73.
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Andrew 1987 V20 Scottsdale 383 TBI, SM465, NP208, 14FF, 4.10 1988 C1500 Scottsdale 305, 700R4, 3.08 1986 K30 Custom Deluxe 6.2, SM465, NP205, 14FF, 4.10 |
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12-28-2010, 08:00 PM
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#10 |
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Registered User
Join Date: Jul 2010
Location: Central IN
Posts: 87
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Re: one ton rear?
It will be hard to ever justify the cost of gear swap, I bet you will never come out on top. Having said that my bb\400\3.73 is perfect with stock tire size, will still pull anything yet cruise down the highway.
Why dont you look in the glove box and see what gears you have, you could have 4.88s or something stupid, in that case I would swap them asap! |
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12-28-2010, 08:41 PM
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#11 |
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Senior Member
Join Date: May 2004
Location: Binghamton, NY
Posts: 3,469
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Re: one ton rear?
If indeed it is a 14ff, you could go low as 3.23s factory. I've never seen them, only one 3.42 in a 2wd.
With a big block, I'd probly go with a 3.73. Still give you some grunt, but still be able to drive and not get passed by gramma....
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2000 GMC CCSB 454/4L80 6” lift SAS 1999 Chevy CCSB 454/NV4500 4” SAS 1999 GMC Yukon 350/4L60 6" SAS |
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12-28-2010, 08:45 PM
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#12 |
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Right turn Clyde
Join Date: Nov 2002
Location: Cincinnati, Ohio
Posts: 2,911
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Re: one ton rear?
That rear is a dana 60 or 70.
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12-28-2010, 08:52 PM
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#13 |
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Watch out for your cornhole !
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: one ton rear?
No way. Cab and Chassis trucks had 14 bolts. I have two in my driveway now.
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12-28-2010, 09:29 PM
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#14 |
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Jonny
Join Date: Apr 2008
Location: Outside the Box, Austin,TX
Posts: 741
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Re: one ton rear?
I've heard of (but never seen) Dana 70's get put in some. Never a dana 60, though.
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1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR |
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12-28-2010, 09:36 PM
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#15 | |
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Watch out for your cornhole !
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: one ton rear?
Quote:
14 bolt = Cab and Chassis
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I'm on the Instagram- @Gearhead_Kevin |
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12-28-2010, 11:07 PM
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#16 |
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Jonny
Join Date: Apr 2008
Location: Outside the Box, Austin,TX
Posts: 741
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Re: one ton rear?
Did all the duallies come with Dana 70's or just a few?
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1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR |
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12-29-2010, 12:36 AM
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#17 |
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Registered User
Join Date: Jan 2009
Location: Canada
Posts: 308
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Re: one ton rear?
I would go with a 3.21 ratio. I had a 77 3/4 ton Camper Special with a 454/TH400 with 3.21 and it got great mileage (for a 454) and I wound still tow almost anything I could hook up to and if you've got a 4 peed then you will actually be able to use that granny low.
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12-29-2010, 01:02 AM
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#18 |
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Professional Beer Tester
Join Date: Aug 2004
Location: Louisiana
Posts: 453
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Re: one ton rear?
Like Tx Firefighter said, cab & chassis one tons had the 14 bolt, duallies had the Dana 70HD until '93 or '94, and after that they had the 14 bolt also. 4.10's were very common in one tons. My '90 R3500 single wheel one ton crew cab has the 3.42's with the 454 & TH400, and it pulls my 5th wheel camper with no problem. I have an '82 dually bed & rear end to make it a dually, but the rear end is the Dana 70HD with 4.10 gears. I really like my 3.42's, so I've been looking around for the later 14 bolt wide axle so I can keep my same gears & limited slip diff. I'll have to move the spring perches and shock brackets because the '93 up frames were wider, but it can be done.
60-66 Nut
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60 Ford F100 Custom Cab 61 Apache Short Fleetside 64 C10 Short Stepside 65 C80 409 V8 5spd(X-Firetruck) 83 GMC 350 Olds Diesel 85 GMC Short Bed 86 GMC Short Bed 90 GMC R3500 Crew Cab 92 GMC 1500 |
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12-29-2010, 01:21 AM
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#19 |
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Jonny
Join Date: Apr 2008
Location: Outside the Box, Austin,TX
Posts: 741
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Re: one ton rear?
Wow, learn something new every day.
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1966 C30, Cummins, stacks, and a flat bed in progress... "Honor.....simply put, A veteran - whether active duty, retired, national guard or reserve is someone who, at one time in his life, wrote a blank check made payable to 'The United States of America', for an amount of 'up to and including his life.' That is Honor, and there are way too many people in this country who no longer understand it." -AEC Hundley USNR |
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12-29-2010, 07:06 PM
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#20 |
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Registered User
Join Date: Jul 2010
Location: Central IN
Posts: 87
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Re: one ton rear?
I have seen several cab and chassis trucks with Dana 70's...
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12-29-2010, 11:40 PM
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#21 |
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Registered User
Join Date: Mar 2002
Location: Forney TX
Posts: 4,512
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Re: one ton rear?
Pretty sure its a 14 FF and the tag in the glove box says 4.10. I might just deal with it for a while. I am going to see what the tach says tomarrow when I drive it with the speedo fixed and see what rpm is what speed.
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Troy 1965 Chevy Bagged,361 sbc,voodoo cam,1.5 full roller rockers,patriot 185cc vortec heads 2.02-1.60,vortec weiand polished intake,demon carb my truckhttp://67-72chevytrucks.com/vboard/s...d.php?t=332884 Big Red Dog build http://67-72chevytrucks.com/vboard/s...d.php?t=572274 |
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12-31-2010, 01:08 AM
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#22 |
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Registered User
Join Date: May 2007
Location: Roanoke, VA
Posts: 78
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Re: one ton rear?
My truck has the 4.10 14 bolt with a TH400, 265/75R16 tires and it turns 3100-3200 at 65mph. Wish I had left the 3.73's in it. (put the 4.10's in before gas prices jumped a few years back). Still got the other rear...thinking about putting the 3.73's back in
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1979 Chevy C20 350/TH400 1974 Chevy C30 350/4speed |
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