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Stock auto lo range vs. Terra-low #309396
08/31/03 08:50 AM
08/31/03 08:50 AM
A
Anonymous OP
Unregistered

I'm sure this has probably been researched before, but I happened to notice that that Terraflex only offers one transfer-case part number for 1987-1992 Isuzus. Does this include automatics? If so, automatics feature a 2.660:1 low range vs. manual tranny 2.283 low range (according to my owners manual). Just wondering if auto and manual tranny transfer cases have interchangable gears? If auto tranny transfer case gears swap into a manual tranny transfer case then a low budget upgrade might exist.

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Re: Stock auto lo range vs. Terra-low #309397
09/04/03 06:12 PM
09/04/03 06:12 PM
kobyhud  Offline
Mudrunner
Joined: Jun 2003
Posts: 442
Provo, Utah
It says on their website that they have stuff to work in anything. I have seen them in both manual and automatics, so yes they exist.


95 Rodeo LS, Auto, SAS, , 60 front, 14 bolt rear. 5.13 r&p, Hydro-Assist, teras..
http://www.pieceofhud.com/gallery
Re: Stock auto lo range vs. Terra-low #309398
09/04/03 06:24 PM
09/04/03 06:24 PM
strawmyers  Offline
Isuzu Moderator
Joined: Oct 2001
Posts: 4,016
Lafayette, IN
Ok, my logic may be screwy but bare with me. If the stock Isuzu gears are interchangeable, then the Tera Lows for that year should work for both autos and manuals. But if you had a manual (2.28:1) and switched to the stock auto gears (2.66:1 or 16.5% lower), then you would only get 1/2 the amount of reduction you would get if you swapped in the Tera Lows (3.07:1 or 34.5% lower).

So i guess, assuming the gears are interchangeable, the question is "how much more are you willing to pay for double the reduction?" If you could find an auto t-case in a junkyard for cheap, it would be quite a savings over the Teras........ but having owned them for a couple of years, I can say that they are worth every penny! <img src="/forums/images/graemlins/kewl.gif" alt="" />


Sean Strawmyer
Back and ready to rock...... crawl.

From Indiana or surrounding states and interested in wheelin'? Check out www.mwior.com

Re: Stock auto lo range vs. Terra-low #309399
09/04/03 07:33 PM
09/04/03 07:33 PM
RobG  Offline
Roll Me Over
Joined: Sep 2000
Posts: 4,277
Winston-Salem, NC, USA
Quote
If auto tranny transfer case gears swap into a manual tranny transfer case then a low budget upgrade might exist.


True, i follow your train of thought here, and while i haven't tried to interchange the gears exactly, i do have first hand knowledge of the auto and manual tcases in my dual tcase project and i see no reason you couldn't swap the gears from one to another. Isuzu auto tcases run about $200-300 in the boneyard, but that still comes in under the cost of a Tera set.

I bought my Tera's during the introductory offer and still run them in my first tcase. I will also second they are worth every penny for the extra reduction.

-Rob


Robert Gorrell
1995.5 Isuzu Rodeo - SAS'd and SOA'd, sitting on 38x13 TSLs, spooled D60 front, 14bff rear locked by detriot, high steer w/ hydro, dual Isuzu tcases.
Re: Stock auto lo range vs. Terra-low [Re: kobyhud] #309400
09/04/03 07:36 PM
09/04/03 07:36 PM
FSJ1978  Offline
Mudrunner
Joined: Jan 2003
Posts: 279
Chino, CA
Dang, this sounds very interresting to me, especially if I could find a case that has a fixed yoke instead of the slip yoke we have on our rig now. If anybody can confirm this, I think it would be well worth the $100 or so out of a Pick-A-Part... *IF* you can find one.



Chris Enos (Chino, CA)

'91 Isuzu Amigo "Rover" (Camaro 3800 swap in progress / 2.25" exhaust)
....(SOA / Custom rear bumper / CB / HAM)
Re: Stock auto lo range vs. Terra-low [Re: FSJ1978] #309401
09/04/03 08:31 PM
09/04/03 08:31 PM
94rodeo  Offline
Body Damage is Cool
Joined: Jul 2000
Posts: 1,783
Holladay, Utah
i rescently put tera gears into an auto t case and have the stock gears that were in it handy if someone wants to make an offer on them.


94 Rodeo
sas'd front dana 44(coil sprung), dual transfer cases (isuzu), tera lows, custom bumpers, winch, arb lockers[url= [url=http://community.webshots.com/user/94rodeo] [url=http://community.webshots.com/user/94rodeo[/url]http://community.webshots.com/user/94rodeo[/url]
Re: Stock auto lo range vs. Terra-low [Re: strawmyers] #309402
09/04/03 08:38 PM
09/04/03 08:38 PM
A
Anonymous OP
Unregistered

I have no clue if they will work, I wish I did, I just thought I'd share an observation that might help some of you with manuals.The auto gears are definatley not as much of a % drop as the terra's but the terras are 800 bucks.I have an auto so if I swapped in terragears I would only be getting around a 16%-17% reduction which is just not worth the cost to me, but it would for be for $100-200. Now, if they come out with 4:1...... <img src="/forums/images/graemlins/evil.gif" alt="" /> Even better though are sets like those available for the samurai , which reduce the hi range as well, negating the need to re-gear diffs, that would be worth digging in the <img src="/forums/images/graemlins/oink.gif" alt="" /> bank.

Re: Stock auto lo range vs. Terra-low #309403
09/04/03 08:46 PM
09/04/03 08:46 PM
strawmyers  Offline
Isuzu Moderator
Joined: Oct 2001
Posts: 4,016
Lafayette, IN
Quote
Now, if they come out with 4:1......


Yeah, that would be nice...... but I'm pretty sure the reason we got 3.07 is because that is the lowest tera could physically go in our case.

~Sean (wishing Isuzu used divorced cases about now)


Sean Strawmyer
Back and ready to rock...... crawl.

From Indiana or surrounding states and interested in wheelin'? Check out www.mwior.com

Re: Stock auto lo range vs. Terra-low #309404
09/04/03 09:58 PM
09/04/03 09:58 PM
Bansil  Offline
Body Damage is Cool
Joined: Apr 2003
Posts: 1,994
Under my wifes RODEO in EastTN
Ok I have a question sorry about using your post....but
it might be helpful??
98 rodeo has a fixed yoke on T/C right?I haven't looked at ours yet it's to low to the ground to get under it <img src="/forums/images/graemlins/rolleyes.gif" alt="" /> but the shaft matt has for sale looks like it
has a slip yoke(very small though)might be able to attach
another T/C(divorced...)and run a short cv shaft in back??
Doug





98 Rodeo(hers)
00 Rodeo(his)

Lisa's Rodeo
Re: Stock auto lo range vs. Terra-low [Re: strawmyers] #309405
09/04/03 10:13 PM
09/04/03 10:13 PM
RobG  Offline
Roll Me Over
Joined: Sep 2000
Posts: 4,277
Winston-Salem, NC, USA
Quote
I'm pretty sure the reason we got 3.07 is because that is the lowest tera could physically go in our case.


Thats correct. anyone who has installed a set of Tera's can verify how close the tolerances are with the 3.07 gears. It wouldn't be possible to make a lower gear (bigger in size) without reworking the shift rails and case itself. Tera did the best they could with what Isuzu gave us.

-Rob


Robert Gorrell
1995.5 Isuzu Rodeo - SAS'd and SOA'd, sitting on 38x13 TSLs, spooled D60 front, 14bff rear locked by detriot, high steer w/ hydro, dual Isuzu tcases.
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