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Discussion Starter #1
I'm sure this has been talked about at length before.... But..
What do you guys run "normally"....

Last Thursday I ran my truck in it's first bogg..

Engine is .060 w/ flat tops voo doo cam 1ooo to 55oo, dove heads, weiland 8012, 770 carb, MSD.

Mud was deeper than I exptected it was also a clay like mud.. Deep, dry, and real sticky. I changed out the 38.5's and put my 32's on. Ran 4 high first pass and it just didnt spool up high enough. I've got a c6 w/ 4.10 gears.

I expected that motor to spin the 32's like crazy? No such luck....


I figured the bogg would get faster as we dug deeper to solid ground. So I ran high range for pass 2 and 3. I never got 5,000rpm in first...

I know nothing about C6 transmissions. do they Shift by themselfs even if you hold it in low?

So newbe to you salty dogs.. What do I do next time? 4-Low and 38.5's? Is my motor missing something? Should it have more power? BTW.. new to this Ford stuff.. you all have converted a Chevy guy with your ground thumping torque of a 460!!!!
 

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glad to hear you've hopped the fence and joined us ford folk!
i would have thought 1st gear would be plenty enough to spin 38's in 4 high, then again i dont no what type of 1st gear a c6 has, i dont know if i could ever bog my granny geared 4 speed down in 1st.
but especially with 32's and 4.10's!!!!!
 

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This is one of those things you'll have to experiment with. I know I was surprised at just how heavy thick clay mud can be, it doesn't like to come out of the tire voids. You could also be losing a lot in the tranny if its not healthy. I have seen a lot of well built engines look like turds because of worn out trannies.

Also, I wouldn't even think about the 38s until you can spin the 32s at will, even in high range.

Dave S.

BTW, what transfer case are you using?
 

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Discussion Starter #7
I'm running what ever transfer case comes in a 87 F250? I have no idea the gears in the xfer case or the C6? you guys know?

THANK YOU ALL SOOOO MUCH!!!
 

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I used high range with 38's, shifted the C6 manually, and won a lot of races. I haven't raced it since I swapped to the 5 speed and doubler.
 

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I run high range with 557/C6 3:55s and 38s. Always run SXS though no bogs for me! I have a built C6 and a huge cooler with a 17" electric fan as well.

Derrick
 

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The biggest thing depends on gear ratio.

Critters, I hate to say, but you are wrong on saying high range is a transmissions worst enemy. If you think about it cars don't have transfer cases which is basically like running your truck in high range. There are plenty of big tired slick wearing cars running the drag strip with c6's and having no problems. The key is making sure your motor/tranny/gear combo is all matched for what you are doing. I know of quite a few trucks running high range but have 5.14 and lower gearsets to make up the difference. Me, I am only running a 4.10 gearset so I'll keep my t-case is low range for now until I get time to regear it. I just smoked my tranny in low range, so what's really harder, the high range or low range?
 

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ive always been told high range eats up tranny's just think about it what is the gear reduction in high range compared to low range

Being told something and doing the research are 2 different things. Like I said before, I guess all them drag car guys are smoking transmissions like nobody's business. If you really think about it, 4 low makes your motor rev higher to get the desired wheel speed. While the motor is spinning higher, the converter is spining faster, causing the pump to spin faster creating more heat making parts wear faster. I'll say it again, it all depends on gearing. Higher gears need the low range to create the same wheel speed as lower gears and high range. :rolleyes:
 

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Being told something and doing the research are 2 different things. Like I said before, I guess all them drag car guys are smoking transmissions like nobody's business. If you really think about it, 4 low makes your motor rev higher to get the desired wheel speed. While the motor is spinning higher, the converter is spining faster, causing the pump to spin faster creating more heat making parts wear faster. I'll say it again, it all depends on gearing. Higher gears need the low range to create the same wheel speed as lower gears and high range. :rolleyes:
There's a big difference between a drag car and a mud truck. All a drag car has to over come is a little bit of rolling resistance, the weight of the car and air. A mud truck has all that and 3ft of mud. It mostly depends on your horsepower. Low horsepower low gears high horsepower higher gears. Also depends on if you drive on the street. If you set up right to run in high range in the mud it would spin the motor to fast on the road, who would want to cruise down the road @ 60 mph and spinning the motor 4000 rpm. I'd set it up with the right gears for low range in the mud then you still have high range for the drags.
 

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By reading the OP's original post, it sounds like a dedicated mud truck and not a street truck playing in the bogs. While I agree that 3' of red clay and mud is difficult to move in, the drag car with a set of 33" slicks has tons of stress on that driveline. creating a similar rolling resistance as mud. Gearing there, just like gearing in our sport is key. Too low gearing won't help when the guys you are running against are using high range and coming up with 159mph wheel speeds. Different schools of thought is all I'm saying
 

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wouldnt high range better for the t case? isnt high range a straighter shot through the t case then havin to use the low range?? kinda hard to explain what im tryin to say, but in a gear driven t case i mean.??? i coudl be wrong
 
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