4.10 Gears in C6 Tranny
#1
4.10 Gears in C6 Tranny
Hey, ive got an 88 f350 4x4 IDI banks turbo non wastegated. C6 3 Speed auto. 33'' all terrains. I THINK 4.10 gears.?
I do about 68mph flat out hitting governor at 3300rpm.
Im trying to figure out what my options are as far as changing my gear ratio. I was told over the phone by a local rear end shop that the highest gear ratio i could go with the size of my front and rear end (which i am not sure either, or how to identify the difference between) is 3.55. he said i would be doing about 70mph at 2500 rpm. Does anyone have a truck with this gear ratio, or any information to point me in the right direction? I dont pull a heavy load very often, the main concern is going to be cruising at freeway speed.
I do about 68mph flat out hitting governor at 3300rpm.
Im trying to figure out what my options are as far as changing my gear ratio. I was told over the phone by a local rear end shop that the highest gear ratio i could go with the size of my front and rear end (which i am not sure either, or how to identify the difference between) is 3.55. he said i would be doing about 70mph at 2500 rpm. Does anyone have a truck with this gear ratio, or any information to point me in the right direction? I dont pull a heavy load very often, the main concern is going to be cruising at freeway speed.
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#7
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holy crap 85! how do you hear yourself think? i see those rpms from time to time loaded up going uphill in 2nd.i couldn't imagine full time.
what kind of fuel economy can you get with the truck 50-55 mph? maybe im worrying way too much about trying to keep her primarily under 1500 rpms when possible.
what kind of fuel economy can you get with the truck 50-55 mph? maybe im worrying way too much about trying to keep her primarily under 1500 rpms when possible.
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#8
well fordf250hdxlt Im still working on getting the interior and the paint job done! I love your paint job you did to your truck it looks amazing!!!! ! anyways its really not very load in the cab I put sound deadner and near carpet pad and carpet in so its really quiet! Anyway Im thinking on putting 3.73s in and a gear vender to get it where i want it! we have been driving it back and forth to work for about a month now! about 30 miles round trip on 3/4 of a tank on the back tank so dont seem like to bad of fuel milage! Im gonna have to check my mileage!I havent really drove it for awhile this is my busy season !!!
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well,if you can find a friend to help,you could hit up a local salvage yard for a front and rear axle from a truck w/ 3.55's.grab some new hardware,and likely for $500 or less,have 3.55 front and rear axles swapped in a weekend.that would be a very good start.
the old C6 though.man.if you could find a whole donor truck with a t19 (of course a zf5 preferably,but just a manual direct drive trans would help) you could swap that out too.
a 4 speed manual/3.55 srw pickup should be able to hit 15 mpg all easy.that's quite a bump from your current 10.swapping axles is very easy and basic.you just follow your nose,and you can't go wrong.simple unbolt (preferably torch out u-bolts) unbolt shafts etc..........ah crap.i just noticed F350,and i was thinking f250.them front D60's don't come cheap like the $100-200 D50 TTB's.nuts.that changes things unless you can find someone willing to swap and help each other do the work.might be worth posting a Craigslist add.you never know.have to be careful there though,cus he could have worn out king pins/joints etc,where yours might be good.that's a tough one.paying someone to install a gear set up front isn't cheap either.....then again neither is fuel.
of course you've always got to consider when its more practical (if funds allow) to just throw in the towel and start considering buying a newer truck w/ correct gearing for your needs and OD trans already too.you've got some thinking to do.
all depends on how much you drive too of course.if your not driving much,then 10 mpg isn't that bad.
the old C6 though.man.if you could find a whole donor truck with a t19 (of course a zf5 preferably,but just a manual direct drive trans would help) you could swap that out too.
a 4 speed manual/3.55 srw pickup should be able to hit 15 mpg all easy.that's quite a bump from your current 10.swapping axles is very easy and basic.you just follow your nose,and you can't go wrong.simple unbolt (preferably torch out u-bolts) unbolt shafts etc..........ah crap.i just noticed F350,and i was thinking f250.them front D60's don't come cheap like the $100-200 D50 TTB's.nuts.that changes things unless you can find someone willing to swap and help each other do the work.might be worth posting a Craigslist add.you never know.have to be careful there though,cus he could have worn out king pins/joints etc,where yours might be good.that's a tough one.paying someone to install a gear set up front isn't cheap either.....then again neither is fuel.
of course you've always got to consider when its more practical (if funds allow) to just throw in the towel and start considering buying a newer truck w/ correct gearing for your needs and OD trans already too.you've got some thinking to do.
all depends on how much you drive too of course.if your not driving much,then 10 mpg isn't that bad.
#11
To the OP: Sounds about rightish to me, had 31's and 4.10s in my 77 she was done around 75 and that was a gasser. My dad has an 88 with 3.55s and 235/75s with a C6 and he cruises 75 at 3000, just told me he got 15.2 on his last trip.
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because a jetta tdi or something couldn't carry much for wood or chips.
im sorry man.i don't mean to sound like a broken record.im just tossing some idea's out there to help him.the cheapest thing to do of course would be to slow down.i have no clue if he or anyone else reading can drive their trucks as slow as 35-40.around here for the most part you could.just not on the larger roads.might need to pull over once in a while to let some people bye,but shoot if it's ones only option to save on fuel cus they lack funds to swap axles/trans,then you betcha im gunna make sure to post all free and cheapest things i can think of to help first.these prices are hurting us all.
im sorry man.i don't mean to sound like a broken record.im just tossing some idea's out there to help him.the cheapest thing to do of course would be to slow down.i have no clue if he or anyone else reading can drive their trucks as slow as 35-40.around here for the most part you could.just not on the larger roads.might need to pull over once in a while to let some people bye,but shoot if it's ones only option to save on fuel cus they lack funds to swap axles/trans,then you betcha im gunna make sure to post all free and cheapest things i can think of to help first.these prices are hurting us all.
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oh boy.85% hwy,screams huge benefits of a nice custom low front air dam.if you can live with the look of the things (?) you could see larger gains than i did cus i drive rural roads mostly and it was a nice jump just for that driving style.hwy speeds of 55 or more,you could really see some nice gains.im sure you could find something free on hand like i did.
if they're black (like what i should do to mine with a cover of some sort) they wont stick out so much.i know its goofy looking,but they work.
if they're black (like what i should do to mine with a cover of some sort) they wont stick out so much.i know its goofy looking,but they work.
#15