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Gear Ratio Question

Discussion in 'The Garage' started by BoDapper, Oct 27, 2005.

  1. BoDapper

    BoDapper Registered Member

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    Hey fellas-

    New to the club, but have learned a pile just reading the threads the short time I've been here- great site for a redneck like me from MT.

    Anyways, I've got an '87 K5 that's got 342's w/"35 and a t400. Hunting for a four speed that will stand up better than the 700R4's I've scattered in the past while trying to decide whether to go with 410 or 456 gears. The rig is going to see some off roading-though nothing like the majority of you boys do- but I want it to be able to cruise as a daily driver as well.

    I keep hearing that 456 is the way to go, but I think it might be a little too low for cruising down the highway. What would the set up be like with say a 4L80E tranny and 456? How about 410?

    Thanks for any suggestions.
     
  2. bablazer73

    bablazer73 1/2 ton status

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    for a daily driver, i'de stay conservitive. My wifes 89 has a 350/700r4(with a very big cooler) 4.10's and 35" tires. A nice combo for her. But the only off roading that see'sd is the 1/4 mile long dirt road to camp. The only time it ever in 4x4 is when I drive it!!
     
  3. 74757685k5

    74757685k5 1/2 ton status

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    4.10s with out overdrive.456 with overdrive.
     
  4. BoDapper

    BoDapper Registered Member

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    What are the rpm's with 456/OD at say 75 mph?
     
  5. gauder

    gauder Banned

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    I come from a drag racing background and see people in the 4X4 forums dogging the 700 R4's all the time. Look into places like Art Carr etc. Their are many cars running in the 9's and 8's in the quarter with 700R4's and 2004R's. They can be built to handle the abuse.

    4.56's with 35's probably around 2400 rpm at 75.

    It would probably be more expensive to run a 4l80e because you would have to buy a stand alone computer to control it plus the price of the tranny.
     
  6. BoDapper

    BoDapper Registered Member

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    Wouldn't dog on them if I hadn't ate so many of them.

    I've heard that they can be built, but the heat is what gets em. I guess if I can't find an affordable 4L80E I might try the 700R4 again with a larger oil cooler.
     
  7. BoDapper

    BoDapper Registered Member

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    Yeah, the computer is definately the $ hangup, I've been hoping to find a deal on one........no such luck yet
     
  8. MattK

    MattK 1/2 ton status

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    isn't there a 4l80...non electronically controlled?
     
  9. gauder

    gauder Banned

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    There is a 4l60 but I don't believe that their is a 4l80.
     
  10. BoDapper

    BoDapper Registered Member

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    Found an outfit that will give 1yr unlimited warranty on a 700R4.

    Claims that he builds the toughest 700 around and will stand behind his work -$1495 includes torque converter and shipping.

    Not too bad....anyone heard of 'Mad Dog Lou' out of Tampa, FL ?

    Am I pissing in the wind?
     
  11. 350k5

    350k5 1/2 ton status

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    Do an eBay search for 700r4 and see what you come up with. I put that in and the first result was this MadDog guy. His stuff seems to be pretty decent, and the 1 year/unlimited miles warranty isn't bad either.

    This one here $975 and Free Shipping + TC

    Look around on there, I've seen others with a little better prices than him that are advertised to be a tough as you will need. I can't be sure though, but if/when my 700r4 does crap out I'll probably start looking on eBay. Good luck :o

    Edit: Here's the other guy that is a littler cheaper and offers free shipping to your closest FedEx Freight dock. Almost forgot either a 1650 or 2000 stall TC. Says that all of their transmissions are Re manufactured not rebuilt and are all tested in an actual vehicle on the street. Seems like you get a lot for the price but worth taking a look at.

    700r4 - $845 + Free TC and Shipping
     
  12. BoDapper

    BoDapper Registered Member

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    Thanks for the help guys, I appreciate it.
     
  13. kyser_soze

    kyser_soze 1/2 ton status

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    Go to this web site. It has an awsome gear calculator, you can jumble around the numbers and figure out the rpms and tourqe changes.

    http://www.accuautoparts.com/
     
  14. muddybuddy

    muddybuddy 3/4 ton status

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    ive got 700r4 and eventually im gonna need a stout one since i elected to go with 5.13s and 39.5. w/o over drive on this daily driver and id be in trouble
     
  15. BoDapper

    BoDapper Registered Member

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    That ratio calculator is exactly what I was looking for, thanks a million.....this forum rocks!

    Think I will go with the 4.56 package, should be what I'm looking for.
     

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