Quote:
Originally Posted by Gromit
Sure you need an overdrive? What is your rear differential gear ratio?
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I want to be able to comfortably go on longer hauls at 70-80mph. The small amount of time I spent on the highway feeling like the engine was pretty wrapped up and barely doing 65 reinforced my notion that I want overdrive.
Can I tell what ratio the diff is from the exterior, or do I need to open it up to find out?
Quote:
Originally Posted by leftybass209
Here is the low down on overdrive automatics-
The 200r4, and the 700r4 family (4l60e and 4l80e) are great transmissions, but all of them have benefits and drawbacks to an installation.
The 2004r has a higher 1st gear ratio that makes it more manageable with a wider selection of gear ratio's. The 700r4 has a 3.06 1st gear. It makes it great with 3.42's and 3.73's, but 4.11's and lower really test your ability to control the traction and may be too low for daily use.
You can't expect a transmission shop to know the particulars about a specific installation in your vehicle. You know because you studied it, but if I asked you about the specifics of dropping a Chevy inline 6 mated to a 700r4 into a Studebaker, you may need to look some stuff up to make sure as well, especially when you charge and warranty your work to a stranger.
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Yeah, I realize now I sounded like a prick up there.. I was underestimating the complexity of even a "common" swap.
I guess what I was getting at is: if you were me and you were going to do an overdrive transmission, would you rather buy the kit online or have a shop do the rebuild? The shop in question isn't a race shop, has always been upfront and doesn't feel scammy. And preference of 700r4 or 2004r?
I'm also going to figure out how to check out my rear diff ratio and post it here too.