How many off you guys, sled pull your daily driver, I want to bad,just kinda sceered I guess.....

 

I do.

 

I do a couple of times a year. Make sure you have traction bars, and blocks, and a good hitch, and you shouldnt hurt anything.

The only thing you should really be worried about is your Dana 70. I killed 2 in mine daily driving it and the pinion shafts are known to snap when pulling, especially if you get to hopping. I have a Dana 80 in mine now.

Eric

 

i do 2

 

Loose the Holley Blue and get an Airdog 150 or Fass.
I had the same set up as you and when the Holley quit the stock LP wouldn't pull through it. Or put a bypass around the Holley, that's what i had to do to get home.

 

I am working on the traction bars, and I changed the fluid acouple weeks ago and noticed some flakes on the magnet is that normal....or should I be worried....

 

Also What do you mean about the blocks, Suspension Blocks.....

 

Yes, suspension blocks. Most of the time they will help to keep you from bouncing/hopping.

Most of the time the magnets on a rear differential will have some sludge on them, but they shouldnt really have any chunks of metal or any big flakes on them.

Eric

 

I would check with Dave before pulling a full sled with your Automatic.

First time I pulled a sled with my DTT, I pulled in 2nd-low and got to 285'.
All went well till the very end. My tranny downshifted! I did not like the sound it made trying to pull a 40,000 lb shed and downshift to first at the same time!
I asked the pros at DTT about this and their answer was, "you can do it OK.... as long as you have deep pockets to refresh it every so often"!

You can probably get away with a couple of pulls. Do it regularly and your tranny will surely let you know it's not happy! JMO

RJ

 

If shiny flakes....not good. I get a fair amount of "mud", or fine black metalic sludge, anytime I go drag racing. That's off the LSD disks, and to be expected.

RJ

 

A built Goerend could care less if it has 40k lbs behind it.

My cousin has been running his built goerend for 3 years now doing nothing but pulling it every weekend in the summer, and it has never had a problem. This is a 600hp truck that places 8th at SDX last year in the 2.6 class.

Heck, Im still running the stock transmission with just some goerend parts and have pulled 10+ times and not a problem out of it yet. It has over 100k miles on it too.

I never downshift mine at the end. I put it in 2nd gear in 4 low. Lock the converter as soon as i hit 2nd gear and dont unlock it until i have stopped moving. It doesent downgear back to 1st until i let out of it and im done pulling.

My point is, a good built auto will have no problem doing lots of pulling and daily driving. I wouldnt be worried at all about the transmission.

Here is a video of one of my pulls:

http://www.youtube.com/watch?v=mWq94...e=channel_page

Eric

 

How can it not downshift as you come to a stop?
You don't unlock the converter till you come to a stop? So your stalling out?

RJ

 

Watch the video I posted. It doesent downgear because I dont lose enough wheel speed for it to need to downgear. Im usually turning about 2k RPM in 2nd gear when the sled stops me.

When I pull, this is how I do it.

Hook to the sled, and spool up just a little with the gear selector in 2nd. Come off the brakes and mash on the throttle. The turbo spools, and it shifts to 2nd gear, and i lock the converter as soon as it shifts. Hold it on the floor until I am at a dead stop(truck still in 2nd gear, converter locked). Then as soon as i am completely stopped, I start rolling out of the throttle quickly, and unlock the converter all at the same time. Then, im sure it downgears once my wheels stop spinning, but im done pulling then.

RJ, did you have your converter locked when you pulled? Sometimes I have seen trucks act a little different with the converter unlocked because its hard to keep wheel speed up, so they will sometimes downgear. Normally, if you have decent power, and dont fall off of the turbo at the end though, a truck will stay in 2nd gear with the converter locked. It can definately be hard on parts if it is downgearing. Better off to hold the gear you are in if its possible.

This video may show it a little better since i stopped right in front of the camera. My pull is at 1:26

http://www.youtube.com/watch?v=waOihYUWpyI

Eric

 

Nice Video!
Admittedly, drag racing, and not pulling, is my thing. But my truck will downshift, even with converter locked. Does it on the Dyno all the time.
Have seen others with same problem.
No, I did not lock my converter. Hard enough to remember to un lock it at the track. Was afraid, being a bit nervous, that I'd forget.

I spent a lot of set up time getting my CTD so it won't spin all four wheels in 4 wheel drive.... for racing. But on a soft track, what you say might work.

If I could keep it from downshifting, I'd be pulling more.

Glad it works for you!

RJ

 

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