gear swap

89cummins · 01-17-2009, 09:23 PM

hey guys just wondering if anyone with a 3 spd 727 has swaped the 3.07's gears for 3.54's and if so how do you like them, and is it possible to stay at highway speeds? Thanks

__________________
-89 w250 4x4, auto, 250,000 miles, ASA intake, 2 turns of fuel screw, 3 turns smoke screw, fuel pin deepest setting, 3200 spring, 5" tip, rattle can paint, glowshift boost and pyro, timing bump, 60mm gds upgrade

89cummins · 01-18-2009, 12:51 PM

bump......

__________________
-89 w250 4x4, auto, 250,000 miles, ASA intake, 2 turns of fuel screw, 3 turns smoke screw, fuel pin deepest setting, 3200 spring, 5" tip, rattle can paint, glowshift boost and pyro, timing bump, 60mm gds upgrade

Philip · 01-18-2009, 12:55 PM

The 3:07 axles are a problem on gear changes. The housings were made differently to accept that gear ratio. The 3:54 ratios do not work in those housings.

There are people that do want the 3:07's. It wouldn't be hard to find someone to trade axles with to get the 3:54 gearing your thinking of.

__________________
93 W350 w/duals, fuel pin turned, 6X.018" injectors, 4" exhaust, 3" air intake horn, Super HX40/16, auto(G56 soon), 3:07's axles, 2" skyjacker lift, B&W flatbed

89cummins · 01-18-2009, 01:54 PM

So if I wanted to switch gears I'd need "new" axles. But do you know how 3.54's would fair with a 3 spd? Thanks

__________________
-89 w250 4x4, auto, 250,000 miles, ASA intake, 2 turns of fuel screw, 3 turns smoke screw, fuel pin deepest setting, 3200 spring, 5" tip, rattle can paint, glowshift boost and pyro, timing bump, 60mm gds upgrade

Philip · 01-18-2009, 02:04 PM

It would drop you to about a 55 MPH truck. Right now if your throttle linkage is set properly you should top out against the stock governors around 80 to 85 MPH.

__________________
93 W350 w/duals, fuel pin turned, 6X.018" injectors, 4" exhaust, 3" air intake horn, Super HX40/16, auto(G56 soon), 3:07's axles, 2" skyjacker lift, B&W flatbed

89cummins · 01-18-2009, 08:20 PM

ok wasn't sure because i've read a lot of posts about different gears in a 3 spd and every post says something different.

__________________
-89 w250 4x4, auto, 250,000 miles, ASA intake, 2 turns of fuel screw, 3 turns smoke screw, fuel pin deepest setting, 3200 spring, 5" tip, rattle can paint, glowshift boost and pyro, timing bump, 60mm gds upgrade

01-17-2009, 09:23 PM	#1 (permalink)
89cummins Cummins Nut Join Date: Nov 2007 Location: CT Posts: 337 Thanks: 1 Thanked 1 Time in 1 Post 89cummins's Truck Pics	gear swap hey guys just wondering if anyone with a 3 spd 727 has swaped the 3.07's gears for 3.54's and if so how do you like them, and is it possible to stay at highway speeds? Thanks __________________ -89 w250 4x4, auto, 250,000 miles, ASA intake, 2 turns of fuel screw, 3 turns smoke screw, fuel pin deepest setting, 3200 spring, 5" tip, rattle can paint, glowshift boost and pyro, timing bump, 60mm gds upgrade

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01-18-2009, 12:51 PM	#2 (permalink)
89cummins Cummins Nut Join Date: Nov 2007 Location: CT Posts: 337 Thanks: 1 Thanked 1 Time in 1 Post 89cummins's Truck Pics	bump...... __________________ -89 w250 4x4, auto, 250,000 miles, ASA intake, 2 turns of fuel screw, 3 turns smoke screw, fuel pin deepest setting, 3200 spring, 5" tip, rattle can paint, glowshift boost and pyro, timing bump, 60mm gds upgrade

01-18-2009, 12:55 PM	#3 (permalink)
Philip 1ST GEN MODERATOR Join Date: Nov 2007 Location: Indiana Posts: 6,221 Thanks: 5 Thanked 244 Times in 223 Posts Philip's Truck Pics	The 3:07 axles are a problem on gear changes. The housings were made differently to accept that gear ratio. The 3:54 ratios do not work in those housings. There are people that do want the 3:07's. It wouldn't be hard to find someone to trade axles with to get the 3:54 gearing your thinking of. __________________ 93 W350 w/duals, fuel pin turned, 6X.018" injectors, 4" exhaust, 3" air intake horn, Super HX40/16, auto(G56 soon), 3:07's axles, 2" skyjacker lift, B&W flatbed

01-18-2009, 01:54 PM	#4 (permalink)
89cummins Cummins Nut Join Date: Nov 2007 Location: CT Posts: 337 Thanks: 1 Thanked 1 Time in 1 Post 89cummins's Truck Pics	So if I wanted to switch gears I'd need "new" axles. But do you know how 3.54's would fair with a 3 spd? Thanks __________________ -89 w250 4x4, auto, 250,000 miles, ASA intake, 2 turns of fuel screw, 3 turns smoke screw, fuel pin deepest setting, 3200 spring, 5" tip, rattle can paint, glowshift boost and pyro, timing bump, 60mm gds upgrade

01-18-2009, 02:04 PM	#5 (permalink)
Philip 1ST GEN MODERATOR Join Date: Nov 2007 Location: Indiana Posts: 6,221 Thanks: 5 Thanked 244 Times in 223 Posts Philip's Truck Pics	It would drop you to about a 55 MPH truck. Right now if your throttle linkage is set properly you should top out against the stock governors around 80 to 85 MPH. __________________ 93 W350 w/duals, fuel pin turned, 6X.018" injectors, 4" exhaust, 3" air intake horn, Super HX40/16, auto(G56 soon), 3:07's axles, 2" skyjacker lift, B&W flatbed

01-18-2009, 08:20 PM	#6 (permalink)
89cummins Cummins Nut Join Date: Nov 2007 Location: CT Posts: 337 Thanks: 1 Thanked 1 Time in 1 Post 89cummins's Truck Pics	ok wasn't sure because i've read a lot of posts about different gears in a 3 spd and every post says something different. __________________ -89 w250 4x4, auto, 250,000 miles, ASA intake, 2 turns of fuel screw, 3 turns smoke screw, fuel pin deepest setting, 3200 spring, 5" tip, rattle can paint, glowshift boost and pyro, timing bump, 60mm gds upgrade