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Old 06-12-2013, 04:46 PM
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trucks pulls 2 weeks

hey guys, how you guys pulling these?

4low, 2nd gear, if i hit the limiter give it 3rd?

traction bars, and second shock up front to kill the wheel hop, also rear suspension will be blocked
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Old 06-12-2013, 05:00 PM
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I use 4LO/3rd (1.54:1) gear because 2nd is actually 1st and overdrive at the same time (2.20:1). I can't tell what year your truck is, but I have seen the coil sprung trucks axle hop the front pretty good in a truck pull. Spool it up and go like mad.
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Old 06-12-2013, 05:03 PM
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Yup 4lo 3rd works the best no need for shifting.
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Old 06-12-2013, 05:11 PM
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Right on thanks guys


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Old 06-12-2013, 05:11 PM
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Truck is an 05 ext cab long box


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Old 06-12-2013, 05:20 PM
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I tried leaving it in D once to try to get more initial momentum, that didn't go so well Yes it rolled out fine, but it bogged when it hit 5th, pulling it back to 3rd did little to salvage that pull. On the up side, I learned what NOT to do.
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Old 06-12-2013, 05:23 PM
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Quote:
Originally Posted by Karls03 View Post
I tried leaving it in D once to try to get more initial momentum, that didn't go so well Yes it rolled out fine, but it bogged when it hit 5th, pulling it back to 3rd did little to salvage that pull. On the up side, I learned what NOT to do.
haha see thats the main reason i asked didnt want to learn the hard way!
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Old 06-12-2013, 08:21 PM
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Quote:
Originally Posted by 617mach 1x View Post
hey guys, how you guys pulling these?

4low, 2nd gear, if i hit the limiter give it 3rd?

traction bars, and second shock up front to kill the wheel hop, also rear suspension will be blocked

just did my first one last month at local fair for auto 6.0 you want 4low 3rd gear or 4 hi 2nd gear. DO NOT RED LINE hold about 3500 rpms unless you have the mods to handle or a ride home.

I talked to bunch of guys on base who did them all the time....

start in 4 hi 2nd gear (you wanna get to 20-25mph) and did a 10psi boosted launch but dont just drop it. let it roll like half a tire turn and floor it so you get momentum. also dont ever slam on breaks or the sled will rip your truck a new one just let off the pedal if problems occur.

try 4 hi 2nd and 4 low 3rd and see what rpm range is best for your tire/ gear etc... your hitch where the sled connects will most likely need to be under 27inches, and a huge hitch is required. also be a good idea to get some heavy tie straps and tighen your front suspension to reduce any wheel hop. if you feel the front end hopping kill it or your gonna break stuff.
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Old 06-12-2013, 09:46 PM
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Quote:
Originally Posted by JustinOOO9 View Post
just did my first one last month at local fair for auto 6.0 you want 4low 3rd gear or 4 hi 2nd gear. DO NOT RED LINE hold about 3500 rpms unless you have the mods to handle or a ride home.

I talked to bunch of guys on base who did them all the time....

start in 4 hi 2nd gear (you wanna get to 20-25mph) and did a 10psi boosted launch but dont just drop it. let it roll like half a tire turn and floor it so you get momentum. also dont ever slam on breaks or the sled will rip your truck a new one just let off the pedal if problems occur.

try 4 hi 2nd and 4 low 3rd and see what rpm range is best for your tire/ gear etc... your hitch where the sled connects will most likely need to be under 27inches, and a huge hitch is required. also be a good idea to get some heavy tie straps and tighen your front suspension to reduce any wheel hop. if you feel the front end hopping kill it or your gonna break stuff.
There is a LOT of difference between 4HI/2nd and 4LO/3rd. The final drive ratios (transmission x transfer case x rear end) are 8.2 and 15.68 respectively. I've pulled on 33s and 35s and there is enough weight on that sled to bog the mechanical advantage of the 4LO/3rd gear combination.

Consider this, 4LO/5th (10.18:1) is lower than 4HI/2nd (8.2:1) gear and I know first hand that 10.18:1 isn't low enough to maintain the momentum required to pull the sled. Since we only get one pull, I'm leaving in 4LO/3rd.

As I stated earlier, the other reason that I wouldn't use 2nd is that 2nd gear uses first and OD to achieve the 2.2:1 ratio (3.10 x 0.71 = 2.20).

Last edited by Karls03; 06-12-2013 at 09:54 PM.
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Old 06-13-2013, 09:27 AM
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4 low 3rd and floorboards til they flag you.
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