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Discussion Starter · #1 ·
Hello, I am looking around for a good upgrade gearbox for my 99 Dodge Cummins. I’m eye balling on PSC Motorsport Andy Red Top gearboxes. My truck has 35’s on it but looking to put bigger lift on it (7” by DOR) and beef up front end components and plan to run 37” tires so I need opinion on steering gear box. Just something that’s heavy duty and good quality boxes is all I would care. Opinions and why ?
 

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PSC is big name....
Look into
1. Redhead
2. Bluetop (which derived from redhead employees i believe )
3.rebuild yours, and mod it for additional flow and pressure (west teaxs mod)
 

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I cant speak for that... my stocker is still fine 200k.

I just read most reviews on these forums.
 
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I just installed a redhead box on my 2000. Works great and the steering is great. Stop wasting time and get a redhead!👍😎
 

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i have a readhead, im not totally sure on them. they seem to have a bit of play in the gear lash, from day one it hasnt been the type of handling i had expected. now mind you have other components that had play in them too but when i went to get alignments the shop said there was play in the box gearing. ive also had teh front cover (the dish thing on the front of the pump) break in half a couple times. when that happens you loose all your fluid and thus loose steering and breaks.

if i were to do it again i think id save money and just get a factory replacement.
 

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Discussion Starter · #10 ·
Interesting. On the redtop website, I see that they have different ratio for gear box. I would think they all be same but I guess it depends on year. One is 18:1 and the other is 15:1.
 

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so i asked about htat and was told with the weight of my truck and larger than stock tires that the standard ratio was the only one i should use. they do not often sell the different ratio
 

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it was the lower of the ratios, i had asked about less turns of hte wheel to go lock to lock and was told to not change the ratio because damage may occur, the gear box would be under too much stress
 

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im not sure if they have changed anything in the past few years but yes, if its all still the same
 

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OP said that he was "looking for an upgrade". I'm not sure that there is one at least without major work. These boxes are under sized for this job and now all are old and many are worn out. My 1st box was leaking and AGR showed up as the be all. Those boxes all failed 2 of them lost the lock ring and dropped all of the fluid suddenly. The 3rd went in as a core to Redhead. Even Redhead can have issues but at least they are honest.

I talked to one person at Redhead who said that the boxes continue to wear once you start adjusting them. It "seems" like adjust to remove slop and another adjustment is needed soon after the 1st. Redhead bought some remans at one time to use as cores and rebuild. Some of those boxes were so bad out of the box that Redhead wouldn't build them.

My next go round will be either Blue Top because I haven't tried them or a rebuild myself. Some have bought from NAPA, Pep Boys etc and been fine. It seems like a crap shoot. Everything else needs to be good for steering to work. Steering column bearings can be tight as can ball joints or the box itself. You have to disconnect sections to make sure that things aren't locked up. Remove the pitman arm from the steering box and you can make sure that the steering box, intermediate shaft and steering wheel move freely. move the wheels and test the ball joint and everything between the steering knuckles for tightness.

I note that the factory specified rotational force required to turn the steering is nearly the same between my old Mercedes and the Ram. Mercedes says to adjust the box with it installed. Dodge says to adjust the box with it on the bench. Regardless of how you do it, go thru the entire process even on a new box before it is installed.
 

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I just purchased a PSC setup with hydraulic ram steering... alot of money but im tired of going through boxes... i had a redhead on it at first... but to no fault of their own it went out... they repaired at no cost (stand up guys at redhead, my hat is off to them)
. So now i have a expensive spare...
I wanted complete kit from one spot. Pump, box and ram...redhead didnt do ram kit at least not at the time. well see how she drives on wednesday. Goodluck on ur setup, my advice, knock out all worn front end parts at once...
 

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I just purchased a PSC setup with hydraulic ram steering... alot of money but im tired of going through boxes... i had a redhead on it at first... but to no fault of their own it went out... they repaired at no cost (stand up guys at redhead, my hat is off to them)
. So now i have a expensive spare...
I wanted complete kit from one spot. Pump, box and ram...redhead didnt do ram kit at least not at the time. well see how she drives on wednesday. Goodluck on ur setup, my advice, knock out all worn front end parts at once...
Post back how it drives. PSC says it won't correct bad steering and is slower to respond in high speed panic situations. I'm still looking for one of these trucks that steers like a normal vehicle. Apparently I should put the Cummins in a 90s era Ford.
 

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I will post back tommorow when i pick it up... that is my comcern as well slow reaction ... crossing my fingers for sure
 

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Got my truck out of the shop..... i was only able to drive for 5 miles at highway speeds and around parking lot a little (i work early as hell) .... im very impressed so far. The slow reaction was not a problem at all and i expected a big difference. only way i can explain it is, if u need to jerk where u really feel the difference, than you were going to flip your truck and wreck anyways. I tried to jerk it around and get a slow reaction and couldnt really.. in parking lot i thought it would be a little more cadillac style but seems same as stock or maybe a notch stiffer. I opted out of the extra reservoir psc recommended, so maybe that would made a difference. She flies straight, pulls a little left but mechanic says he can make the adjustments when i bring it back . I didnt feel any wondering at all ... almost feels like i have to relearn to drive a normal steering truck again. . hopes this helps some of you i can post back as i drive a little more in next few weeks if you all need some more info. Oh another thing for u offroaders, the ram sits a bit lower than the axle taking away some clearance.... im a wannabe offroader so i will be ok..
 
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