Thread: Transaxels 101

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Ok here's the next topic in my Hot Rod Education! I know absolutely nothing about rear ends, other than the curving female variety!
So I've got the 460 with a c6 tranny, running back to the stock 48 f1 ford rear end. I'm not looking to become a drag racer, just a nice daily runner that wouldn't blow apart with some burnouts every once in a while. So let's talk gear ratios, finding the right rear to drop in, and what the ratio numbers mean to the ride. Thanks, Steve.
Also how to hook up a speedo once all conversions are done that is acurate.

Got to know what you have first! car, motor, cam, tranny, tire size.

Pat

Okthe speedo page has a lot of info! Thanks Denny. As for the weight of the finished truck whatever the stock weight of the 48 ford was, minus the original weight of the stock 6 cylinder was, plus the weight of a 71 lincoln 429/460-still don't know, a c-6 tranny, minus whatever stock tranny was in there should be close to the finished weight of the truck!
The tires are lt235/75 R15, on 15 inch aluminium slot mags from the Dukes of Hazzard years!
If I chose to go with an electronic speedo, is it easier to figure the speedo thing out?

Hmmmm.... Sounds like a good place for a Ford 9" with about a 3.70:1 gear ratio... Plenty of off the line go power when ya wanna play, and should still cruize down the highway at an acceptable RPM... There are charts and formulas to tell you what ratio to run for a steady cruise at XXX miles per hour to achieve XXX rpm..... As for the speedo gear, they're easy to change out. As a general rule, if you're going to slow people honk and when you're going to fast the police will usually let ya know!!!!!!!

I was hoping to avoid the notice of the local PD! Thanks for the info on the gear ratio. I have heard the 1970-71 Ford F150 is a direct change out! I'm not sure what the gear ratio is? But Looking forward to hearing more stuff from all of you! Steve.

Originally Posted by stovens

I was hoping to avoid the notice of the local PD! Thanks for the info on the gear ratio. I have heard the 1970-71 Ford F150 is a direct change out! I'm not sure what the gear ratio is? But Looking forward to hearing more stuff from all of you! Steve.

Could possibly be a number of different ratios.... If it has never been opened up, there will be a tag on one of the studs fastening the center section to the housing indicating the gear ratio and whether or not it's a posi.

57 olds with 4:56's oops am i hinting for next years christmas already!

Ok....Ratio's a brief explaination. Target ranges and what the higher and lower ratios give you?

the higher the gear ratio numerically, the more power you will have off the line. the lower the number numerically, the higher top end you will have..... Anyway, that's the basics. I've always liked somewhere between 3.20:1 and 3.70:1 as an acceptable dual purpose ratio.

Thanks Dave! Daily driver with some umphhh! Whats a good ratio, and where to find it?