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Discussion Starter #1
Saw this on another board (ORC).

"Tera Mfg. now has a 300 output shaft conversion that is BEEFY. It comes with the housing, shaft, CV yoke, speedo drive gear, bearings,shims, etc. $350"
 

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I'm sure the folks at Tera are nice folks and all, but do you trust anything they mfg.?

Someone on this board has gone through 5 sets of 4 to 1 gear sets. And after talking to that O'Brien guy that also makes gears, all they had to do is change the helix of the gears to relieve some of the pressure. But that's another story.

Let some other guys be the experiment on their money. Wait for the results.
 

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Discussion Starter #3
I have Tera products (including the 4:1)on both of my Jeeps... never a problem with anything.


I agree though...let others be the guinea pigs.
 

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Well, this fellow broke them with an inline 6.

So this is the way I see it. If you spend $700+ for a 4 to 1 kit. Then you spend $500 for the output shaft. Or maybe even $350 as you mentioned. You are still getting up there where it is more practical to go for an Atlas II.
 

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Discussion Starter #5
Originally posted by Bob/CA:
<STRONG>You are still getting up there where it is more practical to go for an Atlas II.</STRONG>

I dont entirely disagree but I dont think its as black & white as you make it sound. We are talking about people who already own a Dana300 so there is no initial cost there.

More realistic pricing:
4:1 kit - $650
Output Shaft - $350
Twin Stick - $120
.......................
- $1,120

Add some labor, perhaps one of those fancy clocking rings and maybe even some bigger yokes. That will net you a pretty beefy case and you are still quite ahead of the game compared to if you went out and dropped large coin on an Atlas.

Unfortunately most people are forced to upgrade incrementally rather than a huge chunk of coin at one time.

An Atlas has the cool factor going but the D300 isnt chopped liver.
 

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The older Tera 4:1 kits with the 3 gears were notorious for failing but they have been replaced with 5 gear set up and they are holding up fairly well.

The heavy duty output shaft is a good idea if you are going to the 4:1
 

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The frist gear set made by tera, didn't have the oil grove cut in them and that lead to their early problems. I've been running their 4:1 kit for a couple of years now with no problems.
As far as the five sets of gears that seems a little odd. Are you sure they were set up right? I know Jack and he's a real nice guy ( really knows his $hit) but you have to remember he is a salesman.
One thing tera could do to improve there gears is to take lighter cuts when doing the gears. This would lead to a much smoother gear face.
 

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If I remember right, it was the third set of 5 gear, 4 to 1's that failed.
 

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Originally posted by Bob/CA:
<STRONG>If I remember right, it was the third set of 5 gear, 4 to 1's that failed.</STRONG>
When Jack was in Farmington last year, he gave me his explaination as to why the early 3 gear Tera Lo sets were so troublesome...
It seems that some of the OEM D300 gear sets where Hecho in Mexico at the time and if your remaining two gears were these, they would be noisy, have a horrible mesh pattern and were prone to failure. Additonally the cut of the early Tera intermediate gear was noisy in itself. So the upgrade kits at that time not only replaced the two remaining OEMs but also a new intermediate gear was included.
Jack said the really noisy installations usually had the Mexican gears and were the ones prone to failure.
He also said a gear pattern check (just like how axel patterns are checked} will reveal which are the poorly ground Mexican gears and a good pattern set (US or CA made gears) would be as strong as their five gear set.
And he was decent enough to give me an upgrade kit for free!
<IMG SRC="smilies/smile.gif" border="0">
Oh, and I believe it was the two slider gears in the early upgrade kits that had no oil grooves cut into them ...
Imaging having to tear down the first installation down to install the upgrade kit, then have to tear it down a third time to cut the grooves!
<IMG SRC="smilies/pissed.gif" border="0">
Tera was taking a lot of cussing in those daze ...

[ 08-22-2001: Message edited by: Jaffer ]
 
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