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  #1  
Old 03-02-2017, 09:58 PM
beatass4wheel beatass4wheel is offline
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Default Ring/Pinions for 33" tires

Planning on running 33" tires under a 1988 with 2.9L and A4LD Auto trans. Stock axles front and rear. I know I'm gonna need to redo my ring and pinions so what range should I be looking at? The lower (numerically higher) I go the better because I want off road capability over fuel milage and highway speed... but I still want to be able to go 55mph.

I am familiar with some jeeps and was thinking 4.27 or 4.56 gears??? Also, I know stock jeep rear axles can barely hold together with 31" tires, will I be alright with the Ford 7.5 rear? I'm new to rangers though so I need your help.

What do you guys think would be a good ring/pinion size? And, should I worry about any issues with the automatic trans, small v6 engine?

Thanks.
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  #2  
Old 03-03-2017, 07:20 AM
Jimmyspy Jimmyspy is offline
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Most guys go with 4.56 gears if they're gonna stay with 33s. Should help that 2.9 out a little. I'm pretty sure they are available for the TTB.


Judging by some of your other threads, and what it sounds like you want out of this truck, I would look at swapping to an 8.8 out of a ranger (28 spline) or an explorer (31 spline). Either one will be pretty easy to swap in, will be a lot stronger, and you might be able to find one with a factory L/S diff.
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  #3  
Old 03-03-2017, 10:27 AM
beatass4wheel beatass4wheel is offline
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Default Re: Ring/Pinions for 33" tires

Yeah, an 8.8 out of an explorer sounds good, I've heard they are stronger than even a D44.

Once I am out of school I am going to, hopefully, build a rock crawler out of it and I already have a full sized D44 front end out of a 79 Fseries pick up. I plan on finding a full sized 44 or 8.8 for the rear end as well. Give me all the axle I need and some width for more stability.

Long story short, I don't want to do an axle swap yet because eventually I am going to build full sized axles for it; the truck I want to build immediately just has to get me buy with some intermediate mountain trails until I have the money and have gained enough experience to get into crawling. But, the more and more I read the more and more I realize that the 7.5 probably won't cut it.
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  #4  
Old 03-03-2017, 12:03 PM
Jimmyspy Jimmyspy is offline
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Quote:
Originally Posted by beatass4wheel View Post
Long story short, I don't want to do an axle swap yet because eventually I am going to build full sized axles for it; the truck I want to build immediately just has to get me buy with some intermediate mountain trails until I have the money and have gained enough experience to get into crawling. But, the more and more I read the more and more I realize that the 7.5 probably won't cut it.
If you have serious plans for a custom drivetrain down the road, then just run the 7.5 for now. Just know that it is a weak point.


Also, I don't know if I would invest the money in regearing the TTB and the 7.5 if you're just gonna rip it all out in a year or two
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1995 Ford Ranger STX 4x4 ext. cab 4.0l v6 SOLD
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  #5  
Old 03-03-2017, 04:03 PM
beatass4wheel beatass4wheel is offline
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Default Re: Ring/Pinions for 33" tires

Yeah, makes sense. Save the money now to build a 44 and 8.8 for the future.

Do you think a 2.9L would be able to push a full sized Dana60 and 37's? Regeared down to like 4.88 or 5.13's (again, this is far down the road, but since we brought it up figured I'd ask now). A possible 4.0 swap is also inevitable if I continue to work the current motor the way I have been hehehe.
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  #6  
Old 03-03-2017, 05:13 PM
Jimmyspy Jimmyspy is offline
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Quote:
Originally Posted by beatass4wheel View Post
Yeah, makes sense. Save the money now to build a 44 and 8.8 for the future. Do you think a 2.9L would be able to push a full sized Dana60 and 37's? Regeared down to like 4.88 or 5.13's (again, this is far down the road, but since we brought it up figured I'd ask now). A possible 4.0 swap is also inevitable if I continue to work the current motor the way I have been hehehe.
It's all about gearing. Guys turn 44s with 4cylinders without issue. If you hear it right, the motor won't know a difference between stock and 37s.
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  #7  
Old 10-30-2017, 10:12 PM
Undrstm8ed Undrstm8ed is offline
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Default Re: Ring/Pinions for 33" tires

Quote:
Originally Posted by beatass4wheel View Post
Yeah, makes sense. Save the money now to build a 44 and 8.8 for the future.

Do you think a 2.9L would be able to push a full sized Dana60 and 37's? Regeared down to like 4.88 or 5.13's (again, this is far down the road, but since we brought it up figured I'd ask now). A possible 4.0 swap is also inevitable if I continue to work the current motor the way I have been hehehe.

Depending on if you're looking going solid axle 44 from an older 70's Bronco and depending on your needs/wants.., you could get quite far with a lot less. The Dana 44 has its own issues as well does the Dana 60 and up.. Each seems to find a new failure point keeping it just about even along with increased weight which is NOT what you want. This is completely under the assumption you're looking for function > form and not looking to necessarily rock crawl with it.

Living in the desert areas of the Pacific West I do run a 3:73 for the moment on a set of 32.8" DynaPro MT's and have no real issues getting where I want yet, even in 2WD; and NO I have no issues going where the big boys go with mild exceptions to soft silty sand. Everywhere else tho, no worries.

The most reliable setup I've been researching and finding the most is using a Dana 35 with Dana 44 knuckles and the U-joint upgrade and then using certain TTB beams and the right steering knuckles upgrade to a better 2-piston caliper upgrade and get rid of that floating caliper style that makes your front steering knuckle a wearable item along with having not only more brake piston surface area but then if you go into a 16"+ wheel or larger you could potentially use the Sport Trac 12" rotors for a big brake kit using all OEM parts with.

There's a bit more to that but in a nutshell, that is the gist of it.

As for your gearing.. Assuming you are going from a 225/75/15 to something like a 265/70/17 using a DynaPro MT' thats a 32.8" tire thats considered a 33" for example.

Your gearing model would look like this:
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Last edited by Undrstm8ed; 10-30-2017 at 10:18 PM.
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