Anyone here pull in first gear 4hi [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: Anyone here pull in first gear 4hi


brett6.6
05-08-2005, 10:36 PM
if so how did you do , pros and cons of 1stgear 4 hi verse 3rd gear 4low

jburns
05-08-2005, 10:54 PM
1st high,you don't do as good. It is better in low 3 cause you can get the converter to lock and hold. the converter will not lock in 1 gear, so if I was you go low.

Cummin_Stroke_this_Dmax
05-09-2005, 02:11 AM
My buddy pulled 1st gear 4hi most of the time last year. Depending on the track, he prefers it. The times he pulled in 4lo the truck did not perform near as well, I'll attest to that. Oh - by the way he had a stock tranny. He never limped the tranny doing so even with HJAT stack w/Dmaximizer. All and all, from your sig I think I'd give it a try.

bigd
05-09-2005, 10:57 AM
heres a quick question for the LLY crowd does programming follow the stock defueling in 1st gear, At the last pull I was at some of the lly guys were pulling 4hi, 1 and I would think this would not be something you would want to do because of the defueling feature on these trucks.

brett6.6
05-09-2005, 05:35 PM
Well Last Year I Pulled Most Of The Time In 4hi, Partly B/c I Had The Stock Tranny But It Seemed To Do Real Well, This Year I Will Try Both Ways And Give You Some Results.

ChrisF
05-09-2005, 06:55 PM
I always did 4 low 3rd... This year I may have to try somthing else I guess... most of the Dodge Guys I have seen try 4 high have done crappy...

moss022
05-09-2005, 07:14 PM
there are a few guys running there duramaxs in high range, i have asked one of them some questions about it at a pull and he wouldnt comment. i didnt know we have to be tight liped, but they are. they seem to run good, then sometimes they run so so. some of the guys i am talking about are members here, they can comment if they want, they dont tell me anything. i always run in low, i have had good luck with it so far, but if you can keep going in 2nd high, theres more speed there, i prefer being able to down shift with a locked converter if i have to.

dozerboy
05-09-2005, 09:45 PM
I don't pull so I could be wronge, but I do spent all day in the dirt moving a lot of weight. Track conditions is what you should look at dry, hard packed, heavy dirt/clay I would think you would want Low you should have more bite. Lose, fairly wet, fine dirt/sandy go with High.
Well that doesn't look as good/helpful as it sounds in my head. Oh well I tried to explain it.

dpfcummins
05-09-2005, 10:59 PM
I'm not sure how some of you are pulling in 1 hi and doing better than 3 low. Got to get that convertor locked up. Some of the people i've seen pull in 1 hi are running way up in the rpms at the end of the track but the tires arent spinning so hard do to the open convertor.

Burnin Mad Max
05-11-2005, 04:05 AM
I have to agree with going to the low range here, but then again I've never pulled this truck...yet!!!:rolleyes:

McRat
05-11-2005, 07:54 AM
If the track is very slippery, I'd recommend it. Otherwise, giving it partial throttle with big tunes will cause the trans to shift erratically, and bog down. Taking the shifting out of the equation eliminates the problem.

Leadfoot
05-11-2005, 10:55 AM
1st high,you don't do as good. It is better in low 3 cause you can get the converter to lock and hold. the converter will not lock in 1 gear, so if I was you go low.

I have mixed feelings on this. With a gasser the ONLY way to go is low range as they do not have the torque (in a "street" class). In a diesel I have seen guys win running both ways and it is usually track (and track condition) dependant. Locking the converter helps get more power to the ground, but it can also bog the motor (depending on traction and effective gearing). There are times where an unlocked converter (again depending on gear), can be an advantage as the RPM's with remain higher and not bog the motor as quick.

The problem with stating which way to go is that every truck, track, driver, and sled are different. Some have better tunes/trannies and that will affect a truck as much as gearing. And running one way on one track does not mean the same results on another. The best thing to do is get some seat time and try different ways. We have a "test day" at the beginning of each year which is nice for testing out different setups (tires, ballast positions, clamps, etc) as well as try running in different gears without having to worry about points. $10 a hook with unlimited hooks (time permitting of course). I usually learn more about my truck on that day, than the rest of the season combined.

Cummin_Stroke_this_Dmax
05-13-2005, 06:37 PM
I have mixed feelings on this. With a gasser the ONLY way to go is low range as they do not have the torque (in a "street" class). In a diesel I have seen guys win running both ways and it is usually track (and track condition) dependant. Locking the converter helps get more power to the ground, but it can also bog the motor (depending on traction and effective gearing). There are times where an unlocked converter (again depending on gear), can be an advantage as the RPM's with remain higher and not bog the motor as quick.

The problem with stating which way to go is that every truck, track, driver, and sled are different. Some have better tunes/trannies and that will affect a truck as much as gearing. And running one way on one track does not mean the same results on another. The best thing to do is get some seat time and try different ways. We have a "test day" at the beginning of each year which is nice for testing out different setups (tires, ballast positions, clamps, etc) as well as try running in different gears without having to worry about points. $10 a hook with unlimited hooks (time permitting of course). I usually learn more about my truck on that day, than the rest of the season combined.

Well said.