I made it far enough down the track to evaluate my truck and i need to increase my wheel speed
i am running 4.88 gears with np435 trans 203 t-case so using the calculator my wheel speed is about 21-22 mph 2nd low side and 33 inch tires at about 7500 rpm from searching past post on here something around 28 would be better if i switch to 4.10 gears that would put me at 27-28 depending on what rpm
what are ratios that can be put into a 435 trans such as a pro fab kit i am thinking that instead of changing diff ratio and then later down the road i change things and make to much power for the stock trans and 203 that i will upgrade so maybe it would be better to upgrade it now instead of a diff gear change
thanks for any help Brandon

here is a link to this weekends pull Blue Dodge (my left front hub wasn't locked)
http://www.youtube.com/watch?v=YDKogD9aMgc

They do not make a cut third for the np 435.

What you have with your set up is a 31.9 final which is quite slow, changing to a 4.10 gear will give you a 26.8 final which is pretty good all around on 33-12.50 tires. Walt

Yes, your wheel speed is too slow, but what you will probably find is your motor rpm will drop with faster gears.If this is a dedicated puller, you ought to consider a profab 3 spd. (and yes, I just happen to have one for sale... I know, I know, a shamless plug....lol) You can tailer the gearing to what your motor can handle and have more options that just a ring and pinion.

Alan

Alans right the Profab is the way to go, but I believe this is the same Dodge that was at Saline City and by the video was at Greencastle which is a hot street truck, but if your rules allow by all means run the Profab. Walt

Rules???? I didn't think Hot Street had rules.

What is the difference in running a lower ratio gear out of the trans versus out of the diff to get wheel speed does the stress just get put on input shaft of trans instead of pinion or axles? rules are no concern i believe that the local places should call it open gas class not altered but I know what i am up against Alan what is the chances of the hot street next year? how much of an rpm change would you expect going down to 4.1 from 4.88 it seemed to me that the track was taking alot of power by the time i got to pull and i have m/t tires so the 7400-7500 rpm i seen was with good traction which is not always the way it goes what is your opinions of a 14 bolt with 4.10 how well will it hold up if the 14 bolt will work it would be cheap to find a set of junkyard gears instead of the work and parts that would go into putting the GM trans in the truck i have a set of 4.10 for the front mainly the funds on switching trans as i would want to switch a 205 if i go that route
the video was from Greencastle and yeah i had used the rules for hot street as i rebuilt the truck over the winter/spring/still in progress
Thanks for the input

"What is the difference in running a lower ratio gear out of the trans versus out of the diff to get wheel speed does the stress just get put on input shaft of trans instead of pinion or axles? rules are no concern i believe that the local places should call it open gas class not altered but I know what i am up against Alan what is the chances of the hot street next year? how much of an rpm change would you expect going down to 4.1 from 4.88 it seemed to me that the track was taking alot of power by the time i got to pull and i have m/t tires so the 7400-7500 rpm i seen was with good traction which is not always the way it goes what is your opinions of a 14 bolt with 4.10 how well will it hold up if the 14 bolt will work it would be cheap to find a set of junkyard gears instead of the work and parts that would go into putting the GM trans in the truck i have a set of 4.10 for the front mainly the funds on switching trans as i would want to switch a 205 if i go that route the video was from Greencastle and yeah i had used the rules for hot street as i rebuilt the truck over the winter/spring/still in progress Thanks for the input "

 

There are many trucks out there running 4.10's but the odds of breakage are higher than if your running slower gears in the axles. As for adding Hot street next year, that depends on you guys running in the class. You guys need to have a meeting and agree on a set of rules and bring it to the board along with sponsors for the class. The board thought that was happening for the 2009 season and then was told that the rules couldn't be agreed upon and some didn't want to go into sanctioned pulling.Honestly, I'd go with a 14 bolt and the pro fab 465. Why, because the 14 bolt is a good axle with plenty of parts available, and the profab 465 because you have gear choices. Greencastle was a power track for sure and the sled settings didn't help. The transmission would have helped in that case. Also, Its hard to predict the rpm drop because of the numerous variables, but in general, I wouldn't be surprised to see a significant drop going from a 31 final to a 26.7 final assuming nothing else changes.

Brandon,

Here is what I suggest you try before any gear swapping or work of that sort. Your Current gear is 32.598 with the 203 and 435 and 4.10 you would be 27.388.
I would find a friend with a set of 35 BFG all terrains and try them and see how your truck reacts. It will still be lower wheel speed but will help you see how your truck will respond. Also dont forget to take all the variables into consideration when picking your gears ( common tracks, common sleds, driving style and such).

Travis