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08-04-2017, 08:43 PM
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#1
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Senior Member
Join Date: Jun 2017
Location: Worcester Pennsylvania
Posts: 1,063
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Any experience changing the gear set in the rear? making up for toad.
Running a C V-10 @ 15 K, @ Ford 8.8/456, has anyone gone to a Ford 8.8/488? to pick up some bottom end. it would also lower the RPM in shifts, grabbing onto torque.
__________________
2006 Fleetwood Bounder 35E Trek pure Trike, electric, 50 mile range, 7000 ,miles the get everything runner. To be toad list Done, Ford E450 toad. Stay & Play active brakes.
Full-time since 2018. LG 4.5 cu ft washer/dryer.
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08-04-2017, 09:35 PM
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#2
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Senior Member
Fleetwood Owners Club Freightliner Owners Club Spartan Chassis
Join Date: Nov 2009
Location: FORT WORTH, TEXAS
Posts: 2,751
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Quote:
Originally Posted by trx430ex
Running a C V-10 @ 15 K, @ Ford 8.8/456, has anyone gone to a Ford 8.8/488? to pick up some bottom end. it would also lower the RPM in shifts, grabbing onto torque.
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I seriously doubt you would get any real benefit. For the money you can't beat 5Star tune if you need more power. 
Bill
__________________
2008 Newmar Mountain Aire
450 HP Cummins ISM 4000MH Allison Trans.
Towing a 2014 Honda CRV with a Blue Ox tow bar.
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08-04-2017, 10:18 PM
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#3
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Senior Member
Tiffin Owners Club
Join Date: Aug 2016
Location: Bastrop Texas
Posts: 1,343
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Some of you question was Greek to me, but if you have a ford V-10 and need power invest in a banks Power Pac with a transmission shift chip. Most likely not much price difference is what you are saying is changing the gears out in the differential.
__________________
2000 Allegro Bus 35R 3126 Cat 300 Allison 3060MD 6 speed
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08-05-2017, 12:06 AM
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#4
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Senior Member
Ford Super Duty Owner
Join Date: Jan 2011
Location: Kitts Hill, OH
Posts: 2,252
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I have to agree with the other 2 posts in this thread. If you have 456 gears now going to 488s just isn't enough of a change to make it worth it.
It might be enough to upset the program in the computer responsible for shifting the transmission. There is nothing like the feeling you get when you find out your new mod is dislike by the electronics.
And just so you know Ford has never used the 8.8 rear axle in any vehicle behind the V-10 or in ANY vehicle above 6600 GVW.
A 8.8 has no plug on the rear cover.
In a E350 chassis It is most likely a Sterling 10.5 with either a 9.75 gear set or a 10.5 gear set.
If a E450 most likely a Dana 80 which is about 11 inch gear set.
__________________
(RVM#26) THE U-RV 94 F-700/24 foot U-haul box home built RV
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08-05-2017, 09:38 AM
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#5
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Senior Member
Join Date: Jun 2017
Location: Worcester Pennsylvania
Posts: 1,063
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Thanks all, that is why I posted a pic of the axle tag, do I need to get a better image of the tag to truly ID it? It would be just terrible if a gear swap went against programing. It is an 04 E450.
Vin IFDXE45534HA36I38
__________________
2006 Fleetwood Bounder 35E Trek pure Trike, electric, 50 mile range, 7000 ,miles the get everything runner. To be toad list Done, Ford E450 toad. Stay & Play active brakes.
Full-time since 2018. LG 4.5 cu ft washer/dryer.
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08-05-2017, 07:57 PM
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#6
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Senior Member
Fleetwood Owners Club Freightliner Owners Club Spartan Chassis
Join Date: Nov 2009
Location: FORT WORTH, TEXAS
Posts: 2,751
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What are you towing? I can't tell my CR-V is back there. I would look at the 5 Star web site.
Bill
__________________
2008 Newmar Mountain Aire
450 HP Cummins ISM 4000MH Allison Trans.
Towing a 2014 Honda CRV with a Blue Ox tow bar.
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08-05-2017, 10:24 PM
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#7
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Senior Member
Join Date: Jun 2017
Location: Worcester Pennsylvania
Posts: 1,063
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It is an E350, sprung to an E450 work van filled with tools, (will still be working), about 7200 now, will try to trim it under 6000, hence SMI real time brakes.
__________________
2006 Fleetwood Bounder 35E Trek pure Trike, electric, 50 mile range, 7000 ,miles the get everything runner. To be toad list Done, Ford E450 toad. Stay & Play active brakes.
Full-time since 2018. LG 4.5 cu ft washer/dryer.
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08-06-2017, 08:26 AM
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#8
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Senior Member
Fleetwood Owners Club Freightliner Owners Club Spartan Chassis
Join Date: Nov 2009
Location: FORT WORTH, TEXAS
Posts: 2,751
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Quote:
Originally Posted by trx430ex
It is an E350, sprung to an E450 work van filled with tools, (will still be working), about 7200 now, will try to trim it under 6000, hence SMI real time brakes.
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I would be careful about how much you try to tow. I bet you are only rated to about 5000 lbs regardless of the hitch (I see the 10,000 hitch) what is your combined weight rating? The problem is the frame may not be strong enough to handle the extra stress.
Bill
__________________
2008 Newmar Mountain Aire
450 HP Cummins ISM 4000MH Allison Trans.
Towing a 2014 Honda CRV with a Blue Ox tow bar.
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