3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Get answers to Bronco-related technical issues.
Post Reply
Flatheadpopup
Official CCB Member
Official CCB Member
Posts: 95
Joined: Sat Oct 23, 2010 3:31 am

3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by Flatheadpopup »

I'm sure that this combo will work o.k. around town and on flat highway but does anyone have experience with 3.50 gears 33" tires and a 3 speed manual going up and down Ute pass (I have a stock 289)? I want to be able to take my Bronco up the pass to go fishing and don't want to be rowing the transmission the whole time. Its an uncut/luber build with no plans to ever wheel it hard. Regearing and or transmission swaps are out of the equation at the moment but I would be willing to go with a 31 tire if the 33's gonna suck for my combo. So, what do you guys think?
67 Bronco in progress 2.5 lift, 351w, toploader, 4.11s and 33's
65 Mustang...also in progress.
User avatar
Gunnibronco
Official CCB Member
Official CCB Member
Posts: 4077
Joined: Mon Jan 03, 2011 5:07 pm

Re: 3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by Gunnibronco »

I don't know Ute pass, or your 289, but I'm running a 302, 33s 3.50s w/a NP435 (similar 2nd/3rd/4th gears to the 3 spd 1st/2nd/3rd). I'm guessing your only hope for anything off road is in 4 low. 3.50s are considered under geared for a 302/33" combo, most choose 4.11s. I'd consider a smaller tire. I use my 6.69:1 1st gear and 4 low a lot, I wouldn't consider my combo with a 3 spd.

Most of my suggestion is based on my guess at how a 289 runs, if you had a 302 I'd say you'd be ok w/33's & 3.50s, for what you want/need.
"America is at that awkward stage. It's too late to work within the system, but too early to shoot the bastards." ΓÇô Claire Wolfe
74-AWB 98", ZF5, Atlas4, HP609s, ARBs, 37's, 3.5" lift-5.5" front coil springs, Tahoe rear springs, EFI 302, h-boost, 4x4x2 hyrdo assist, custom dash & gauges
72 U15- Explorer Sport-Candyapple Red (1 of 141)
User avatar
sbolt19
Official CCB Member
Official CCB Member
Posts: 740
Joined: Wed Oct 06, 2010 9:04 am

Re: 3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by sbolt19 »

I made that trip an awful lot with that setup but substitute the 289 with a 302. It was a little tough to keep the RPMs up high enough & I was always shifting. Mine ran up Ute really well with 31s, a whole helluva lot better than it did with 33s. If you want to go with 33s you really need to look at a gear swap with the original 3 speed. Not saying that it can't be done, because I did to it, but it just isn't real fun shifting all the time.
Flatheadpopup
Official CCB Member
Official CCB Member
Posts: 95
Joined: Sat Oct 23, 2010 3:31 am

Re: 3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by Flatheadpopup »

Exactly what I needed to hear. If you were shifting all the time I would be too. 31's are an easier fit with my uncut fenders too but I do like the way 33's fill out the front fenders a little better. I'm just going to go with the 31's and be done with it...not many 33x10.5 selections available anyways. Thanks for the input guys.
67 Bronco in progress 2.5 lift, 351w, toploader, 4.11s and 33's
65 Mustang...also in progress.
User avatar
Rox Crusher
Official CCB Member
Official CCB Member
Posts: 3980
Joined: Sun Oct 10, 2010 4:36 pm

Re: 3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by Rox Crusher »

31 wouldn't be bad..............

does anybody make a 32" anymore ?
1977 Sport, 351w OBDII EFI motor, 4R70W auto, 4:88 gears, ARB lockers, 3.5" suspension, 33" tires.
Flatheadpopup
Official CCB Member
Official CCB Member
Posts: 95
Joined: Sat Oct 23, 2010 3:31 am

Re: 3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by Flatheadpopup »

Yeah, 32's aren't too hard to find-but with the 11.5 sidewall I wonder if they would create an issue with my uncut rear fenders? Everything else I have been looking at had a 10.5 or lower width...I may have to look into this further. Thanks
67 Bronco in progress 2.5 lift, 351w, toploader, 4.11s and 33's
65 Mustang...also in progress.
User avatar
Kinder
Official CCB Member
Official CCB Member
Posts: 4372
Joined: Wed Sep 29, 2010 9:03 pm

Re: 3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by Kinder »

Flatheadpopup wrote:Yeah, 32's aren't too hard to find-but with the 11.5 sidewall I wonder if they would create an issue with my uncut rear fenders? Everything else I have been looking at had a 10.5 or lower width...I may have to look into this further. Thanks


I'm no LUBR driver, but from those who do drive them the 10.5 width seems to work really well, especially at 33" tall they have very minimal rub. I guess it depends on your rims, original? I'd go with what I know works, i.e. 10.5 width.
Best to Date MPG: 26.6
Flatheadpopup
Official CCB Member
Official CCB Member
Posts: 95
Joined: Sat Oct 23, 2010 3:31 am

Re: 3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by Flatheadpopup »

kinder wrote:
Flatheadpopup wrote:Yeah, 32's aren't too hard to find-but with the 11.5 sidewall I wonder if they would create an issue with my uncut rear fenders? Everything else I have been looking at had a 10.5 or lower width...I may have to look into this further. Thanks


I'm no LUBR driver, but from those who do drive them the 10.5 width seems to work really well, especially at 33" tall they have very minimal rub. I guess it depends on your rims, original? I'd go with what I know works, i.e. 10.5 width.



I have a set of the Jeep Renegade slots waiting to go on it...I think they are 15x7 or something along those lines. All I know is that they are popular with the luber crowd and I scored mine off craigslist for cheap fire fire
67 Bronco in progress 2.5 lift, 351w, toploader, 4.11s and 33's
65 Mustang...also in progress.
User avatar
Brianut
Official CCB Member
Official CCB Member
Posts: 350
Joined: Thu Oct 14, 2010 6:06 am

Re: 3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by Brianut »

As a luber guy I can tell you with 3.5" lift and the BFG 33x10.5 and 4.11's and 3 spd it does pretty good.
you will rub when you start getting flexy off road.
I have late model F150/Bronco stock alum wheels and they are 7.5"s wide.

Do you have your33" tires already? from the pic it looks like you might.
I have considered cutting and going 35" or at least 12.5" wide 33's, in that case I would need 4.56 gears and would have a set of 4.11's available.....
Flatheadpopup
Official CCB Member
Official CCB Member
Posts: 95
Joined: Sat Oct 23, 2010 3:31 am

Re: 3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by Flatheadpopup »

Brianut wrote:As a luber guy I can tell you with 3.5" lift and the BFG 33x10.5 and 4.11's and 3 spd it does pretty good.
you will rub when you start getting flexy off road.
I have late model F150/Bronco stock alum wheels and they are 7.5"s wide.

Do you have your33" tires already? from the pic it looks like you might.
I have considered cutting and going 35" or at least 12.5" wide 33's, in that case I would need 4.56 gears and would have a set of 4.11's available.....



That is the way it looks now at stock height with 30x9.5's. I have a 3.5" lift that I am getting ready to install. Right now I'm just trying to decide which way I want to go with it as far as tire size but I'll probably just go with 31's to keep costs down--gotta keep some money in the Mustang fund too.
67 Bronco in progress 2.5 lift, 351w, toploader, 4.11s and 33's
65 Mustang...also in progress.
User avatar
sbolt19
Official CCB Member
Official CCB Member
Posts: 740
Joined: Wed Oct 06, 2010 9:04 am

Re: 3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by sbolt19 »

The other thing you can do to get clearance in the wheel wells so the tire doesn't bite the rear fenders is to cut & bend the inner fender lip flat against the inside of the fender. Most of the time, when you get hung up and eat metal, it's that inner lip that gets snagged. That lip is what, 1/2" wide?? It also gives you clearance to go with a slightly wider tire (i.e. 10.5) than having to search and find the 9.5 width.
Flatheadpopup
Official CCB Member
Official CCB Member
Posts: 95
Joined: Sat Oct 23, 2010 3:31 am

Re: 3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by Flatheadpopup »

sbolt19 I couldn't agree more about the fender lips...I had already given mine the hammer/dolly treatment for added clearance on my small tires.
67 Bronco in progress 2.5 lift, 351w, toploader, 4.11s and 33's
65 Mustang...also in progress.
User avatar
airbur
Official CCB Member
Official CCB Member
Posts: 1721
Joined: Wed Sep 29, 2010 7:39 am

Re: 3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by airbur »

Flatheadpopup wrote:....I have a set of the Jeep Renegade slots waiting to go on it...I think they are 15x7 or something along those lines. All I know is that they are popular with the luber crowd and I scored mine off craigslist for cheap fire fire


What bolt pattern? Bronco is 5x5.5.
Sold: 1970 w/427W Injected Stroker
User avatar
cracker
Official CCB Member
Official CCB Member
Posts: 113
Joined: Mon Oct 04, 2010 8:19 am

Re: 3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by cracker »

FYI.. BFG A/T come in a 33/9.50/15 size, as I have a set sitting in my garage. That would help alot with the unsprung weight. There is alot of difference in weight between the 9.50 and the 10.50 width.
1-1966 Bronco
1-1967 Bronco
1-1969 Bronco
2-1973 Broncos
And a couple even run.....
Flatheadpopup
Official CCB Member
Official CCB Member
Posts: 95
Joined: Sat Oct 23, 2010 3:31 am

Re: 3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by Flatheadpopup »

airbur wrote:
Flatheadpopup wrote:....I have a set of the Jeep Renegade slots waiting to go on it...I think they are 15x7 or something along those lines. All I know is that they are popular with the luber crowd and I scored mine off craigslist for cheap fire fire


What bolt pattern? Bronco is 5x5.5.



Yep, they are off an old cj5 which has the same 5x5.5 pattern and a good offset for the luber Broncos. A big plus is that they are forged instead of being cast like most slots are.
67 Bronco in progress 2.5 lift, 351w, toploader, 4.11s and 33's
65 Mustang...also in progress.
Flatheadpopup
Official CCB Member
Official CCB Member
Posts: 95
Joined: Sat Oct 23, 2010 3:31 am

Re: 3.50 gears, 33's and 3 speed manual...bad idea or o.k.?

Post by Flatheadpopup »

cracker wrote:FYI.. BFG A/T come in a 33/9.50/15 size, as I have a set sitting in my garage. That would help alot with the unsprung weight. There is alot of difference in weight between the 9.50 and the 10.50 width.



I love those tires but they are on national backorder from BFG. My original plan was to run the 33x9.5s but they are next to impossible to find new. I wouldn't mind a used set if they were in good shape...wanna get rid of yours? icon biggin
67 Bronco in progress 2.5 lift, 351w, toploader, 4.11s and 33's
65 Mustang...also in progress.
Post Reply