well i pulled out an old 9'' rearend that i had laying around to put in my truck, but saw that its was a 2.75.... so im now on the hunt for a 3.25, 2.50, 3.89, or 4.11 rear end at the junk yard... anyone know which ford car/truck had those? PLEASE HELP ME!!!

 

I have a 3.25 ratio from a 1968 F100 if you want it. I am in Oklahoma City.

 

James,

I could take the low road on the title of this thread - but I won't.

I know there are folks out there that have this stuff memorized, but they may not see your thread for a couple of days. It can also take some time to type in the info so you have it. One thing that can help you out is a search of the forum (I know there are at least two threads with tons of rear axle data, plus a tech article) and, believe it or not, a general search of the web. I did a quick Google (www.google.com) search and came up with the following web site: Drivetrain.com. There is an awful lot of information there and it's certainly not the only web site.

So, until somebody who knows this stuff can find a minute to give you a hand, you might be able to get the answer with a little browsing. Good luck and I hope this helps a little!

 

sweet, thanks alot, ive met a few guys at the city impound auction that know anything and everything (he was able to see this motor laying out and was able to give the year, make, model of what it went to just by looking at it) but even just a point in the right direction helps me alot... thanks for atleast dropping your 2cents in!

 

Or you could just swap out the ring & pinion in the one you have. New 9" R & P's are pretty inexpensive. Good used ones are even cheaper. Just a thought. There is a GREAT write up on this in the tech articles.

Ron

 

yea ive thought about that... but if i can pick one up from a junkyard for under $100 then id rather go that away, but i just didnt have any idea where you could find some under what cars/trucks

 

What is wrong with a 2.75? You listed 3.25 or 2.50 would work or is that supposed to be 3.50?

I think I am looking for a very low gear ratio like 2.5 or 2.75. If you where in the San Jose, CA area I would buy your 9" if you found what you where looking for.

 

I'm going with a 3.00 under mine. I figure the 390 will get it moving just fine and give me some nice highway driving. My '91 Mustang GT has a 2:73 rear and I like the way it moves out and runs at 70-75. That being said I may have a set of 9" 3.25 R & P in one of my cabinets if anyone needed them. I'll check tomorrow.

Ron

 

yea i ment 3.50.... not 2.50.... i should proof read now, lol

 

I have 3.00 in mine behind a c-4. I traded out the 3.50 R&P because the freeway rpm was too high. I'd rather have the better mileage than the jackrabbit starts. John

 

yea, thats why i was really looking for a 3.00 or 3.25... and maybe keep a 4.11 or lower for the weekend racing.

 

Since I have a diesel I figure I better look for something really low. Where should I look for 2.50 or 2.75, a luxury car like a lincoln?

 

Bots,

Since large displacement engines have more torque the rear end ratios tend to be taller. Look for something with a 400+ cubic inch engine in it and you will be more likely to find the ratio you want. A lincoln would probably be a good choice.

Vern

 

My friend got a 76 Ranchero that had a very low rearend ratio. John

 

I would like to hear more surrounding the diesel in your truck. I looked in your gallery but didn't see and pictures of it there. How much does it weigh, miles per gallon, any problems installing the engine, what kind of trans.