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Old 01-23-2003, 01:47 PM   #1 (permalink)
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Prorock 60 or Tera60r ?

I'm having Sunray build me one of their 1550 front-ends, I need a HP center section.What are the pros & cons of Dynatracs Prorock60 and Teras 60r(The CRD is out because it is a shovel up front)
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Old 01-23-2003, 01:58 PM   #2 (permalink)
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I would say Pro Rock for the front due to the more ground clearence and the Bad Ass diff cover. I think the Pro Rock is also a bit lighter and stronger but I could be wrong on that one.

Thats My .02

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Old 01-23-2003, 02:03 PM   #3 (permalink)
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which cover the cast or 3/16 steel?
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Old 01-23-2003, 02:08 PM   #4 (permalink)
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3/16, Cast or aluminum. All Bad Ass IMO
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Old 01-23-2003, 08:40 PM   #5 (permalink)
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there has to be more opinions than just a cool cover
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Old 01-23-2003, 08:51 PM   #6 (permalink)
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Re: Prorock 60 or Tera60r ?

Quote:
Originally posted by briejer
I'm having Sunray build me one of their 1550 front-ends, I need a HP center section.What are the pros & cons of Dynatracs Prorock60 and Teras 60r(The CRD is out because it is a shovel up front)
Haven't I seen this thread before?

I don't think the CRD will be a shovel up front. Since it will not be rotated up, it should slide over the rocks better since the leading edge is higher, it would be more like a ramp, not a shovel.

However, I think I agree with Xtreme and would say the ProRock would have higher clearance in the front. Maybe do the CRD in the back for triangulation. It will depend some on what type of suspension you are running.
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Old 01-23-2003, 09:09 PM   #7 (permalink)
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Why aren't you using a 9" center section? Even more ground clearance then the two aforementioned center sections, pinion bearings are stronger, pinion gear is stronger, more gear ratio selections, and they can build you a trick chro-mo center section that is very strong.
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Old 01-23-2003, 09:11 PM   #8 (permalink)
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Quote:
Originally posted by blk87K5
Why aren't you using a 9" center section? Even more ground clearance then the two aforementioned center sections, pinion bearings are stronger, pinion gear is stronger, more gear ratio selections, and they can build you a trick chro-mo center section that is very strong.
since you brought it up.....i vote for mog9's .
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Old 01-23-2003, 09:47 PM   #9 (permalink)
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I don't know about the tera unit, but the pro rock has a seperate custom oiler for the pinion, which I like, and I think Dynatrac makes top notch stuff. If I had the cash, Id buy PRO ROCK. Ive helped with the install of a pro rock, and it is one NICE axle.
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Old 01-23-2003, 09:56 PM   #10 (permalink)
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Talk to Beast40, he has a ProRock 60 rear. Heres a shot if the pig and cover.

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Old 01-24-2003, 12:18 AM   #11 (permalink)
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Quote:
Originally posted by blk87K5
Why aren't you using a 9" center section? Even more ground clearance then the two aforementioned center sections, pinion bearings are stronger, pinion gear is stronger, more gear ratio selections, and they can build you a trick chro-mo center section that is very strong.
I'm not using a 9" center because I prefer a high pinion. I drive like shit and can't keep a low hanging driveline off of the rocks. Th anks for the input.
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Old 01-24-2003, 07:38 AM   #12 (permalink)
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The ProRock has two oil sumps, which is a huge advantage for jeeps driven on the road alot. It also has more clearance and is a much stronger housing.

The ProRocks also have an optional bridge for mounting links over the pumpkin, the bridge bolts in so you could make one yourself, or when you switch suspensions buy a new one from Dynatrac to start with a clean plate.

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Old 01-24-2003, 08:39 AM   #13 (permalink)
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Here is a pic of the new cover:



Very badass and made from Heat treated Nodular Iron.
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Old 01-24-2003, 08:48 AM   #14 (permalink)
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Like I said the cover alone should make up your mind if the ground clearence, strength, and oil sytem don't.
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Old 01-24-2003, 11:58 AM   #15 (permalink)
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I went with Tera when I did my axles near the beginning of last year. I did have some lube problems in the rear even though I was running a pretty conservative anlge (i.e. less than 10 degrees). Depsite what I've heard, Tera's customer service was excellent. They responded very quickly to my problems and sent out replacement parts immediately.

That being said, I would choose the ProRocks if I did it all over again
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Old 01-24-2003, 12:48 PM   #16 (permalink)
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Quote:
Originally posted by briejer


I'm not using a 9" center because I prefer a high pinion. I drive like shit and can't keep a low hanging driveline off of the rocks. Th anks for the input.
High pinion 9" is quite common and probably cheaper.

-troy
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Old 01-24-2003, 12:51 PM   #17 (permalink)
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And not 1/4 as strong as a ProRock high pinion
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Old 01-24-2003, 01:19 PM   #18 (permalink)
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Originally posted by XtremeEngineering
And not 1/4 as strong as a ProRock high pinion
I would like to see the math to support your claim. Not trying to be an ass, but I don't see why it would only be ~25% as strong. What aspect of the high pinion 9" carrier makes it that much weaker than a D60?
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Old 01-24-2003, 01:20 PM   #19 (permalink)
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You may want to have Sunray build it with a reagular HP D60 center and shave it themselves in-house. They built my RCD60 and shaved it and did a GREAT job.

If that is not an option, I would do the Tera. The Dynatrac is a HEAVY pig.
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Old 01-24-2003, 01:36 PM   #20 (permalink)
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I'm replacing a hp9" it has 8.8 gears lowest ratio is 4.88 and I've broken it to much. I'm leaning torwards the Prorock
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Old 01-24-2003, 01:58 PM   #21 (permalink)
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Old 01-24-2003, 01:59 PM   #22 (permalink)
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I just stated 1/4. I am not sure of exact but let see for a minute,

A HP9 uses 8.8 gears out of a Explorer. A ProRock 60 uses Reverse cut 60 gears witch are about 30% stronger then a regular 60. That's all I am saying, and if you read the sig you will see that I am a 9" guy. I run them in the back of both rigs and both are 35 spline, spooled and geared. I just don't like the HP9 due to the fact that I have seen to many of them broke. Call Currie and ask them how muck power a HP9 can take and then compare it to what Dynatrac will tell you a ProRock can take.
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Old 01-24-2003, 03:19 PM   #23 (permalink)
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[QUOTE]Originally posted by blk87K5


I would like to see the math to support your claim. Not trying to be an ass, but I don't see why it would only be ~25% as strong. What aspect of the high pinion 9" carrier makes it that much weaker than a D60?
[/QUOT


i have no math to support my claim.......... but i broke ford hp nines.... there is no pinion bearing support on the hp variety nor is it an actual nine r&p it is an 8.8......... currie says not to run bigger than 35 inch tires with them..... mine are now gone and im running PRO ROCKS...... well they are a sweet setup and couldnt suggest any other!
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Old 01-24-2003, 03:23 PM   #24 (permalink)
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Quote:
Originally posted by XtremeEngineering
I just stated 1/4. I am not sure of exact but let see for a minute,

A HP9 uses 8.8 gears out of a Explorer. A ProRock 60 uses Reverse cut 60 gears witch are about 30% stronger then a regular 60. That's all I am saying, and if you read the sig you will see that I am a 9" guy. I run them in the back of both rigs and both are 35 spline, spooled and geared. I just don't like the HP9 due to the fact that I have seen to many of them broke. Call Currie and ask them how muck power a HP9 can take and then compare it to what Dynatrac will tell you a ProRock can take.

You have to remember we are talking front axles here, a HP9" should have no problem surviving up front. In the rear is where all the problems arise.

Also a HP9 uses RC 8.8 gears so for a front application they will be on the drive side.
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Old 01-24-2003, 05:26 PM   #25 (permalink)
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I did not know that they used 8.8 r&p's. That would explain the strength issues.
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