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Discussion Starter #1
Tera Low sells 3.15 gears for the Spicer 18, but I already have 2.46 gears. I can get the Tera gears for $500, but is that a waste of money? I will have a T-98 with 6.4:1 first gear, and 5.38's in the axles. I am just having a hard time deciding whether it is worth $500 to go from 84.7 to 1, to 108.4 to 1. I will have 38.5 SX's, and I don't really think either ratio will be low enough.
 

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Did you talk to O'brian's Gear? He's in Sac, and builds gear sets for 18's all the way down to like 4.5 to 1.

I have heard no actual strength reports on these. I still run the 2.46 set behind a 4.3 Vortec and an SM465.

Andy
 

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Discussion Starter #4
If that is the place I am thinking of the gears are like $1500 a set. I can't spend that much.

I have not really heard bad things about the Tera gears, and I will only be running a 4-cylinder. Did the guy breaking them have a V-8?
 

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I would recommend staying away from Tera gears. In the small group of wheeling friends I have, 2 of them have had tera's in their 18's. They got a refund when set #5 went boom. V-6's, 33's and little skinny pedal between them :eek:
 

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I have gone through 2 sets and each set only lasted one season so stay away of them is what I would suggest. Save all your $$$ and go to an atlas and a centered rear 60 and be done with it.
 

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i think o'brien's are about it. I went Atlas at that point because I didn't feel there were enough people running O'briens to know how reliable they were going to be. Also with the cost taken into consideration I just said screw it and threw the extra money at it and got the Atlas. I just didn't want to look back and say, damn I should have got the Atlas.:D
 

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O'brien's gears are very expensive, but if you want to stick with the 18 I think it's the only way to go. If you want to go to a center output, you might as well go Atlas for a few $$ more. I went to an 18 for 2 reasons: 1) rear output is ~4" lower- making for much better d-line angle when SOA on an 83" wheelbase 2) option of useing an overdrive (if he ever gets it into production).

I would'nt buy the Terra's because I do'nt think the difference is significant enough & they seem to have a reputation for breaking.
 

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Discussion Starter #11
66CJdean said:
I have gone through 2 sets and each set only lasted one season so stay away of them is what I would suggest. Save all your $$$ and go to an atlas and a centered rear 60 and be done with it.
Unfortunately, I have an offset rear steer Dana 44. I don't have the Atlas as an option unless I start over on the project I am almost done with.:(

Is it the Tera gears that suck, or just the Spicer 18 design? I mean, will it be weaker with the Tera gears?
 

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I agree totaly. After two sets and many hours on the trail removing broken teeth I went Atlas and centered.
 
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