4.9 performance
Elder User
Joined: Oct 2007
Posts: 566
Likes: 1
Why change to 4.10 gears? I have a 1 ton truck, and most of my driving is around town or on the freeway. I changed from 3.74's to 3.31's, and can now cruise at 65--70 mph at a relatively good rpm. I frequently tow/haul, and don't really tell the difference. The only place I noticed it was towing a trailor over the mountains into Oregon, but would rather have to downshift on those rare occasions than to tach out constantly. Unless you are hauling everyday, I can't see the use of 4.10's.
Lead Driver
Joined: Mar 2008
Posts: 7,184
Likes: 382
From: Near Los Angeles
4.10s are horrible without o/d or very tall tires. My E250 is getting buzzy by 60mph. I have a set of 3.55s (used) I might install when it cools off (damn it's humid and hot here !!!) but, I'm kicking around buying something in the 3.25-3.30 neighborhood. My main concern is will my FI 300 be able to handle a heavy 3/4 ton van and a 4500 lb camper trailer adequately
Now, with my hp 300, I have only hauled in town. So far I am happy with the change. Why suffer 100% of the time for the hauling capability you will use 2% of the time? When I get my Gear Vendor in, that should head tremendously with mpg and towing.
Elder User
Joined: Oct 2007
Posts: 566
Likes: 1
I changed my rears from the 3.74's to the 3.31's about 5 years ago. They are in my F-350. With my 390 in it I towed a trailor over the passes into Oregon. With my C6 I did have to hit second gear on the highest grades, but for the other 17 hours of driving, they were fine, a bit more top end.
Now, with my hp 300, I have only hauled in town. So far I am happy with the change. Why suffer 100% of the time for the hauling capability you will use 2% of the time? When I get my Gear Vendor in, that should head tremendously with mpg and towing.
Now, with my hp 300, I have only hauled in town. So far I am happy with the change. Why suffer 100% of the time for the hauling capability you will use 2% of the time? When I get my Gear Vendor in, that should head tremendously with mpg and towing.
Elder User
Joined: Jun 2005
Posts: 651
Likes: 0
From: northeast, KY
Another little tip I forgot to mention. When I had my last 300 I had an 88 Bronco that was sitting in the back yard. I noticed that the 351 had alot bigger throttle body. I took the throttle body, the tubes and air cleaner off my bronco and fit it on the 300. It was a world of difference, like a completly different animal. Given it was just getting more air, but in my opinion, there was a Huge seat of the pants difference. It's just a suggestion, but if I got another 300 this would be one of the first things that I would do to it.
matt
matt
Elder User
Joined: Oct 2007
Posts: 566
Likes: 1
Another little tip I forgot to mention. When I had my last 300 I had an 88 Bronco that was sitting in the back yard. I noticed that the 351 had alot bigger throttle body. I took the throttle body, the tubes and air cleaner off my bronco and fit it on the 300. It was a world of difference, like a completly different animal. Given it was just getting more air, but in my opinion, there was a Huge seat of the pants difference. It's just a suggestion, but if I got another 300 this would be one of the first things that I would do to it.
matt
matt
Moderator
Joined: Dec 2007
Posts: 7,987
Likes: 104
From: Boise, Idaho
After just taking it out of the box it shipped in, I could tell it was very high quality.
Sealed it up incredibly well (have 20psi vacuum at idle). I'd recommend it over any others.
Elder User
Joined: Jun 2005
Posts: 651
Likes: 0
From: northeast, KY
Matt
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Elder User
Joined: Jun 2005
Posts: 651
Likes: 0
From: northeast, KY
No, it was a 95, the 96 had a 351 and Mass Air. The 95 was Speed density like the bronco, but I don't think that would make much of a difference as long as you used your Mass Air meter...if yours is...a Mass aired 300 would probably have more gains from this swap. JMO
Matt
Matt
New User
Joined: May 2010
Posts: 2
Likes: 0
about axle identification.
im new to this site. i have worked in quite a few junkyards. wegotit auto salvage in ny,j&v auto in westhampton ny, midway auto salvage in nj, etc. the absolute easiest way is to look at the sticker on the drivers side door jamb/post. look at where it says "axle". what is the code? now look up ford axle codes online @ drivetrain.com go to ford differential axle codes.(i used to know all the codes by heart but its been a couple years.)this should tell you exactly what ratio and wether or not it is conventional,limited,or posi. now of course this only works if you have a "stock" rear..but if not. check the tag. it says it right on there. or if your still not certain it is what it says it is. do the test. hope this helps everybody.
New User
Joined: May 2010
Posts: 2
Likes: 0
i have a 92 f 150 reg cab long bed 4.9l 2wd.(i wish it were 4x4 but have been told the 2wd frame will not handle the torque from the four wheel) i have the m50d tranny with od. it came stock with 2:73 conventional and really light suspension. 275,000 miles young. since i've had it i've put about 6 grand in it. swapped out the rear for 3:55 posi. put heavy duty f250 suspension with load helpers in the back. hd 250 coils/shocks up front. i got rid of that crap 92 exhaust manifold and put the 94 manifold on. and everything but the long block is new. avgs bout 18 mpg highway and 13 city. (front fuel gauge does not work,so i got good at this) the 2:73s gave me about 24 mpg highway. had hard time gettin movin pullin a 17 foot ski boat but once it got movin she hauled nicely. but the 3:55s have pulled alot of vehicles very stuck in mud out. i can put about 3500 lbs in the bed and pull a fully loaded 10 ft. uhaul trailer that wieghs i guess bout 2000 lbs without a problem. the old 300 still lights em up! i have had alot of 300s and this is by far the strongest setup i've had. but i am ready to swap to the 460. make her a prerunner. we'll see.
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
Actually, the frame is no different between 2wd/4wd in the F150, from 1980 to 1996. In fact, it's a bolt-in swap to change from twin I-beam to the TTB front drive axle. I'm getting ready to do this to my 80......
Logistics Pro
Joined: Nov 2009
Posts: 3,885
Likes: 12
From: Lawrence Swamp
jerzyrebel-
Welcome to the form & site! Hope U can stay awhile, lots of good folks here.
Thanks for the info. A 4wd 150 W/a 460 should B something! A friend has (I think it's) an 80's 250 Lareyette with the 460. We mostly use it as a woods truck (in 4 w) and occasionally to haul (anything!) down the road.
easiest way is to look at the sticker on the drivers side door
wish that worked in every case.
check the tag
some don't even have them!
Welcome to the form & site! Hope U can stay awhile, lots of good folks here.
Thanks for the info. A 4wd 150 W/a 460 should B something! A friend has (I think it's) an 80's 250 Lareyette with the 460. We mostly use it as a woods truck (in 4 w) and occasionally to haul (anything!) down the road.
easiest way is to look at the sticker on the drivers side door
wish that worked in every case.
check the tag
some don't even have them!
Moderator
Joined: Dec 2007
Posts: 7,987
Likes: 104
From: Boise, Idaho
This is the first time I've ever heard this (and the exhaust manifolds from EFI are a hot topic due to their performance upgrade for a carb model), but what exactly's the difference between a 92 and 94 exhaust manifold on the 300?