dually gear change

richie 2 · 02-02-2014, 06:51 PM

88 chev 1 ton, dana dually rear. gonna take the gear change plunge...3'55? any horror stories? tks.

Kirk Morgan · 02-04-2014, 08:56 AM

Depending what your current gear ratio is you may have to change the carrier. Other wise on drama. Depending on which engine you have and tire size i like 3:73s better.

Kirk

richie 2 · 02-05-2014, 12:12 PM

tks kirk. I believe they are presently 4;56....16'' wheel/tire. 383ci hyd. roller block stroker, drt. torquer heads w/TBI. th.400 trans....not sure if there is a milage/towing converter available?

Alan Roehrich · 02-05-2014, 09:38 PM

ATI has a converter for it.

If you're pulling much, a 383 won't get it done with 3.55 gears. It'll do well to pull a heavy load with 3.73 gears, most small blocks are better off with 4.10 gears, even with a 3.75" stroke.

Fooling with small block engines in bigger heavy trucks, it seems most get better mileage and live longer with 4.10 gears.

There are a lot of 16" tires, some taller, some shorter. It makes a difference.

02-02-2014, 06:51 PM	#1
richie 2 Senior Member Join Date: Feb 2009 Posts: 963 Likes: 406 Liked 199 Times in 90 Posts	dually gear change 88 chev 1 ton, dana dually rear. gonna take the gear change plunge...3'55? any horror stories? tks.

02-04-2014, 08:56 AM	#2
Kirk Morgan Member Join Date: Jan 2009 Posts: 224 Likes: 1 Liked 71 Times in 40 Posts	Re: dually gear change Depending what your current gear ratio is you may have to change the carrier. Other wise on drama. Depending on which engine you have and tire size i like 3:73s better. Kirk

02-05-2014, 12:12 PM	#3
richie 2 Senior Member Join Date: Feb 2009 Posts: 963 Likes: 406 Liked 199 Times in 90 Posts	Re: dually gear change tks kirk. I believe they are presently 4;56....16'' wheel/tire. 383ci hyd. roller block stroker, drt. torquer heads w/TBI. th.400 trans....not sure if there is a milage/towing converter available?

02-05-2014, 09:38 PM	#4
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,065 Likes: 1,486 Liked 1,630 Times in 378 Posts	Re: dually gear change ATI has a converter for it. If you're pulling much, a 383 won't get it done with 3.55 gears. It'll do well to pull a heavy load with 3.73 gears, most small blocks are better off with 4.10 gears, even with a 3.75" stroke. Fooling with small block engines in bigger heavy trucks, it seems most get better mileage and live longer with 4.10 gears. There are a lot of 16" tires, some taller, some shorter. It makes a difference. __________________ Alan Roehrich 212A G/S