Gearing Up - The 1947 - Present Chevrolet & GMC Truck Message Board Network

weekender · 05-08-2005, 10:01 PM

I've got a 83 dualy that I just finished up and it has a 454 with the old standard three speed with low, I havn't looked to see what the gear ratio is in the rear but it is to low, has anyone know how or what I can do to change the gear ratio in the rear, what would work? I wish I had another gear to go into. You guys with the one tons know what I mean. Got it all together, now I can't aford to drive it. Any ideas.

Jim

edog1 · 05-08-2005, 10:48 PM

Do you plan doing much towing with you truck ?

weekender · 05-09-2005, 11:19 PM

I pull a fifth wheel camper but I have enough motor to do the job. I use to pull it with a 350 motor so this 454 should do ok even with a higher rearend.

u2slow · 05-10-2005, 12:42 AM

Dana 70 gears are easy to come by. Most likely 4.10 or 4.56 in your 1-ton. 3.54 should be considerable improvement.

*1FaastC10* · 05-10-2005, 01:46 AM

most likely they're 4.56s. i wouldnt go any lower than 4.10 if you're using it to pull a trailer of any weight, which a 5er is of considerable weight, or it would be bumper pull. 3.54s are a hideous idea, i wouldnt even consider a gear like that on any truck that if they werent in it from the factory.

TRUCKGUY · 05-10-2005, 02:14 PM

i got 3.20's and they do great!!!...............later

weekender · 05-13-2005, 09:02 PM

Sorry it took so long to get back,in my line of work we are realy busy right now. I like the idea of the 4:10's What truck do you think would have them allready under it, I would rather change the whole rearend then rebuild the whole rearend.

05-08-2005, 10:01 PM	#1
weekender Registered User Join Date: Oct 2003 Location: Jewett Illinois Posts: 32	Gearing Up I've got a 83 dualy that I just finished up and it has a 454 with the old standard three speed with low, I havn't looked to see what the gear ratio is in the rear but it is to low, has anyone know how or what I can do to change the gear ratio in the rear, what would work? I wish I had another gear to go into. You guys with the one tons know what I mean. Got it all together, now I can't aford to drive it. Any ideas. Jim

05-10-2005, 12:42 AM	#4
u2slow Web Wheeler Join Date: Jan 2000 Location: BC, Canada, eh? Posts: 388	Dana 70 gears are easy to come by. Most likely 4.10 or 4.56 in your 1-ton. 3.54 should be considerable improvement. __________________ '66 C10 longstep - Clifford equiped '84 C20 Suburban 6.2L - awaiting 4x4 conversion '91 V3500 Crewcab - awaiting diesel swap

05-10-2005, 02:14 PM	#6
TRUCKGUY Registered User Join Date: Jan 2005 Location: Nortonville, Ky Posts: 407	i got 3.20's and they do great!!!...............later __________________ Dan. 55 F100 panel truck project 64 350/th400/10bolt short fleet 66 F100 302/C6/9" short fleet 67 IH 4x2 304/t984speed D44 373 locker lwb box 67 IH 4x4 304/t98 4speed/d44/d60 4.10'slwb box 67 IH Travelall 4x4 304/t98 4speed/12bolt/10bolt 81 2wd short fleet current build! 83 350/700r4 short fleet 88 k5 12" lift 3/4 ton swap mud toy 96 Dodge 3500 CUMMINS/5speed/4x2 97 Pontiac Trans Am WS6/LT1 383/6speed/T-tops

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05-08-2005, 10:48 PM	#2
edog1 Registered User Join Date: Oct 2003 Location: Santa Maria ,CA Posts: 142	Do you plan doing much towing with you truck ?

05-09-2005, 11:19 PM	#3
weekender Registered User Join Date: Oct 2003 Location: Jewett Illinois Posts: 32	I pull a fifth wheel camper but I have enough motor to do the job. I use to pull it with a 350 motor so this 454 should do ok even with a higher rearend.

05-10-2005, 01:46 AM	#5
1FaastC10 Account Suspended Join Date: Oct 2002 Location: Elkhart, IN Posts: 6,399	most likely they're 4.56s. i wouldnt go any lower than 4.10 if you're using it to pull a trailer of any weight, which a 5er is of considerable weight, or it would be bumper pull. 3.54s are a hideous idea, i wouldnt even consider a gear like that on any truck that if they werent in it from the factory.

05-13-2005, 09:02 PM	#7
weekender Registered User Join Date: Oct 2003 Location: Jewett Illinois Posts: 32	Sorry it took so long to get back,in my line of work we are realy busy right now. I like the idea of the 4:10's What truck do you think would have them allready under it, I would rather change the whole rearend then rebuild the whole rearend.



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