4.6 with 33's
#31
02-05-2008 | 02:30 PM
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From: Rohnert Park, CA
^^ real good advice. If you go with bigger tires... spider gears should be changed out to a more "solid" carrier. Something very often over looked. I will be running a detroit locker rear and possibly an elctric locker up front. Much more solid then a planetary gear set. Or run the Detroit Tru-Trac to be rid of the LS clutch packs.
#32
02-05-2008 | 02:34 PM
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From: Colorado
Originally Posted by etrevino103186
I originally had 33"s with the 4.6 and 3.55's. When I put my lift on I went to 37"s and 4.88's. I haven't had any problems...wait I lie. I did blow out the spider gear... The shop that did the work determined that the big tires just put too much stress on for 8.8 axle. They suggested adding a LSD, I did, no problems to date. If anyone is thinking about doing gears I would definitely suggest adding LS. I can really feel it if I am offroad and I loose traction in one tire, in a matter of seconds the other one kicks and I am off and rolling. I usually cruise at the upper end of the spectrum on the highway and I don't have horrible mileage maybe 14, 15 with a tailwind.
EDIT: To get back to factory specs, I should have gone with 4.56's but I wanted extra grunt.
EDIT: To get back to factory specs, I should have gone with 4.56's but I wanted extra grunt.
Also was the LS put in the front or rear? My local shop was guessing my truck had a 8.8 in the front and 9.75 in the back, I haven't climbed underneath to look yet.
...and shoulda put this upfront, sorry for all the newb questions. Just trying to make sure I put my money in the right basket.
#33
02-05-2008 | 02:47 PM
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From: Lone Star State
Originally Posted by duece212
Great lookin truck! How did you go 37's on the 6" lift, I didn't think that was supposed to clear.
Also was the LS put in the front or rear? My local shop was guessing my truck had a 8.8 in the front and 9.75 in the back, I haven't climbed underneath to look yet.
...and shoulda put this upfront, sorry for all the newb questions. Just trying to make sure I put my money in the right basket.
Also was the LS put in the front or rear? My local shop was guessing my truck had a 8.8 in the front and 9.75 in the back, I haven't climbed underneath to look yet.
...and shoulda put this upfront, sorry for all the newb questions. Just trying to make sure I put my money in the right basket.
Last I heard you couldn't put ls in the front, I could be wrong. I would agree with your local shop assuming you have the 5.4. As far as I know 4.6's have 8.8 back and front and the 5.4's have 8.8 up front and 9.75 in the back.
#34
02-05-2008 | 02:51 PM
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From: Rohnert Park, CA
^^ yup. 5.4 has the 8.8 IFS up front with REVERSE cut gears and the 9.75 out back.
Both the 4.2 v-6 and the 4.6 v-8 have the same front end, but they have the smaller 8.8" rear end.
LS shouldn't be put up front IMO but a selectavle locker would do the trick. that way its an open dif under normal driving, but flip a switch and presto, your all locked up.
Both the 4.2 v-6 and the 4.6 v-8 have the same front end, but they have the smaller 8.8" rear end.
LS shouldn't be put up front IMO but a selectavle locker would do the trick. that way its an open dif under normal driving, but flip a switch and presto, your all locked up.
#35
02-05-2008 | 02:58 PM
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From: Lone Star State
Originally Posted by MercedesTech
^^ yup. 5.4 has the 8.8 IFS up front with REVERSE cut gears and the 9.75 out back.
Both the 4.2 v-6 and the 4.6 v-8 have the same front end, but they have the smaller 8.8" rear end.
LS shouldn't be put up front IMO but a selectavle locker would do the trick. that way its an open dif under normal driving, but flip a switch and presto, your all locked up.
Both the 4.2 v-6 and the 4.6 v-8 have the same front end, but they have the smaller 8.8" rear end.
LS shouldn't be put up front IMO but a selectavle locker would do the trick. that way its an open dif under normal driving, but flip a switch and presto, your all locked up.
#36
02-05-2008 | 03:09 PM
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From: Colorado
Thanks again guys, really appreciate it. I have the 4.6. I guess I will look into upgrading the rear end at the same time as doing the gears to only have to go in once. The front I will leave alone (just gears). I know I'm "that guy" but this is mostly a cosmetic upgrade, the only times I plan on actually using the capabilities of the truck would be when camping/fishing/, most other times will be on road.
Pictures shouldn't be allowed on this site, my initial plans started out small. After lookin at pics and researchin for a few days they sure have changed
Pictures shouldn't be allowed on this site, my initial plans started out small. After lookin at pics and researchin for a few days they sure have changed
Last edited by duece212; 02-05-2008 at 03:12 PM.
#37
02-05-2008 | 03:16 PM
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From: Rohnert Park, CA
Originally Posted by etrevino103186
would you get chatter driving around with a locker if it wasn't locked in?
No, when your not "locked" up its completely open. Acts just like your stocker open front dif. I only have experience with ARB and OX... haven't tried the electric locker yet. tnsilverfx4 has the Auburn electric locker (the one I think I will be getting up front). Shoot him a PM or post over here : https://www.f150online.com/forums/sh...d.php?t=317741
if you want his personal opinions.
I honestly say you would be pretty happy with it. "Its better to have and not need, then to need and not have" IMO
#38
02-05-2008 | 03:18 PM
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From: Rohnert Park, CA
Originally Posted by duece212
Thanks again guys, really appreciate it. I have the 4.6. I guess I will look into upgrading the rear end at the same time as doing the gears to only have to go in once. The front I will leave alone (just gears). I know I'm "that guy" but this is mostly a cosmetic upgrade, the only times I plan on actually using the capabilities of the truck would be when camping/fishing/, most other times will be on road.
Pictures shouldn't be allowed on this site, my initial plans started out small. After lookin at pics and researchin for a few days they sure have changed
Pictures shouldn't be allowed on this site, my initial plans started out small. After lookin at pics and researchin for a few days they sure have changed
#39
02-05-2008 | 03:48 PM
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From: Houston
Originally Posted by hllon4whls
I wish people would stop to think about this for a minute before posting this type of post. Its a 35 inch tire. 4.88 gears will not put the truck at 3000 rpm at 75mph. It would be approximately 2500. That tire has a lot of rollout and the OD is deep. If are talking about 3rd gear, your RPM's would be very high.
Even a 31 inch tire would not cross the ~2800 rpm barrier with 4.88's. OD is the great equilizer with gear ratios and remember, its different than cars that have a 26 or so high tire. Makes a huge difference.
Even a 31 inch tire would not cross the ~2800 rpm barrier with 4.88's. OD is the great equilizer with gear ratios and remember, its different than cars that have a 26 or so high tire. Makes a huge difference.
#40
02-05-2008 | 03:57 PM
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From: Houston
#41
02-05-2008 | 03:58 PM
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From: Rohnert Park, CA
go to this thread:
https://www.f150online.com/forums/sh...12#post3036412
and read the 6th one down. That is a member on this site with 4.88's and 35" tires on a newer body style Ford F150
https://www.f150online.com/forums/sh...12#post3036412
and read the 6th one down. That is a member on this site with 4.88's and 35" tires on a newer body style Ford F150
#42
02-05-2008 | 04:04 PM
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From: Rohnert Park, CA
Originally Posted by scott1981
Did a search, if you went from a 31" tire to a 35" tire and had 3.55 gears your new gear ratio should be 4.0080. Thats putting you closer to 4.10 gears so 4.56 is already overkill and will easily cover the extra rotating mass of the tires.
It says they 4.56 with 35" tires would put your right about stock... 4.88's are only one step up and not even in the "red" for "more power".
plus... who wants 3.55 rear in a big ole truck ?
#43
02-05-2008 | 04:04 PM
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From: Lone Star State
Originally Posted by MercedesTech
You referring to the selectable locker ?
No, when your not "locked" up its completely open. Acts just like your stocker open front dif. I only have experience with ARB and OX... haven't tried the electric locker yet. tnsilverfx4 has the Auburn electric locker (the one I think I will be getting up front). Shoot him a PM or post over here : https://www.f150online.com/forums/sh...d.php?t=317741
if you want his personal opinions.
I honestly say you would be pretty happy with it. "Its better to have and not need, then to need and not have" IMO
No, when your not "locked" up its completely open. Acts just like your stocker open front dif. I only have experience with ARB and OX... haven't tried the electric locker yet. tnsilverfx4 has the Auburn electric locker (the one I think I will be getting up front). Shoot him a PM or post over here : https://www.f150online.com/forums/sh...d.php?t=317741
if you want his personal opinions.
I honestly say you would be pretty happy with it. "Its better to have and not need, then to need and not have" IMO
Last edited by etrevino103186; 02-05-2008 at 04:06 PM.
#44
02-05-2008 | 04:07 PM
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From: Rohnert Park, CA
Originally Posted by etrevino103186
Yeah you are right about needing. I really don't need it right now I don't off-road enough. To this day I haven't got stuck in my truck, granted I do pick my battles wiseley
I agree... if you are not going to off-road it much. Wont tow too much, and don't abuse your truck then a front locker would really be a "non-wise" investment.
#45
02-05-2008 | 04:13 PM
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From: Lone Star State
Originally Posted by MercedesTech
You got a real nice looking truck there BTW.
I agree... if you are not going to off-road it much. Wont tow too much, and don't abuse your truck then a front locker would really be a "non-wise" investment.
I agree... if you are not going to off-road it much. Wont tow too much, and don't abuse your truck then a front locker would really be a "non-wise" investment.
I think I might be done for the most part for large mods. I'm going to work on that thing, what's it called saving?
