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Transfer Case
Gear Reduction System 2 (G.R.S.) Gears and Rebuilt Transfer Cases |
 The G.R.S. II Transfer Case Gears for the Samurai has a low-range gear ratio of 4.89:1. This makes it 115% lower than stock in low-range and 18% lower than stock in high-range. With stock ring & pinion gears (3.72:1), the G.R.S. II gives you a final drive ratio of 66:1. With 5.62:1 ring & pinion gears, you can have a final drive ratio of 100:1! We also offer completely rebuilt G.R.S. II transfer cases built with a "split H" shift-pattern, allowing for both 2WD and 4WD low-range. Advise us of the year of your vehicle and we will put the proper size flanges on your rebuilt transfer case! Petroworks is the original designer of these gears. This is how we got started, building gears for everyone else. We only sell the 4.89 gears because after extensive computer modeling and real world testing we found that gears larger than 4.89 would not last as many miles, and that larger gears created excess torque on an already weak case. Accept no Substitutes!
Brand New, ONE PIECE GEARS. No longer welded, even quieter than before! Made in Japan
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Type: |
Price: |
Shipping Weight: |
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| GRS-8300 G.R.S. II - Deluxe Kit |
Includes gears, and complete rebuild kit (bearings, counter shaft, thrust washers, seals, and gaskets). |
Sale Price $625.00 |
16 lbs |
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Online Store |
| GRS-8200 G.R.S. II - Standard Kit |
Includes gears, countershaft & “O” ring, thrust washers, and gaskets. |
Sale Price $500.00 |
12 lbs |
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Online Store |
| GRS-8100 G.R.S. II - Basic Kit |
Gears Only. |
Sale Price $445.00 |
10 lbs |
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Online Store |
| GRS-9200 G.R.S. II - Completely Rebuilt Case |
Completely rebuilt T-Case with our 4.89 gears (bearings, counter shaft, thrust washers, seals, and gaskets). We can build the case with a SPLIT "H" shift pattern. Please call to order. |
Sale Price $875.00 |
35 lbs |
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Transfer Case Rebuild Kit |
 We can supply a complete kit which includes new bearings, new gaskets, roller bearings, flange nuts, a complete set of all necessary shims to rebuild your t-case (stock or GRS). It also includes an exploded diagram to illustrate how to put it together!
| SKU: |
GRS-8500 |
| Price: |
$180.00 |
| Shipping Weight: |
7 lbs. |
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Online Store |
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Split "H" Pattern Shift Fork Mod |
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The Petroworks Split "H" Pattern Shift fork is a absolute must for a low gear transfer case. This "H" pattern gives you a the ability to drive in 2WD Low, but easily allows for switching to 4LO or 4HI.
| SKU: |
GRS-5320 |
| Price: |
$45.00 plus a $75.00 Core |
| Shipping Weight: |
1 lbs. |
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Built to order. Please call. |
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Speedometer Cable |
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Replacement OEM Suzuki Speedometer Cable.
| SKU: |
GRS-5311 |
| Price: |
$55.62 |
| Shipping Weight: |
2 lbs. |
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Online Store |
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Polyurethane Shift Sheet |
 Just like the stock part (our part no. GRS-2250) except that this part is made from polyurethane.
| SKU: |
GRS-2251 |
| Price: |
$12.95 |
| Shipping Weight: |
1 lbs. |
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Online Store |
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Polyurethane Shift Bushing Kit |
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Do a complete tune-up on your shift levers so that you will not be stuck when you need them most. Includes “sloppy shifter fix”, polyurethane transmission bushing and Polyurethane T-Case sheet.
| SKU: |
PWP6000 |
| Price: |
$27.95 |
| Shipping Weight: |
1 lbs. |
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Online Store |
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"Strengthened" Transfercase Arms |
 Our "Strengthened" Transfer Case Arms will help resist the tendency of the stock transfer case arms from bending, a common problem. The "Strengthened" Transfer case Arms come in both the long and short arms. Specify product when ordering.
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Type: |
Price: |
Shipping Weight: |
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| GRS-3008 |
Long arm w/exchange |
$34.95 |
5 lbs. |
Built to Order. Call to Order. |
| GRS-3009 |
Short arm w/exchange |
$29.95 |
5 lbs. |
Built to Order. Call to Order. |
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The G.R.S. II Transfer Case Gears for the Samurai has a low-range gear ratio of 4.89:1. This makes it 115% lower than stock in low-range and 18% lower than stock in high-range. With stock ring & pinion gears (3.72:1), the G.R.S. II gives you a final drive ratio of 66:1. With 5.62:1 ring & pinion gears, you can have a final drive ratio of 100:1! We also offer completely rebuilt G.R.S. II transfer cases built with a "split H" shift-pattern, allowing for both 2WD and 4WD low-range. Advise us of the year of your vehicle and we will put the proper size flanges on your rebuilt transfer case! Petroworks is the original designer of these gears. This is how we got started, building gears for everyone else. We only sell the 4.89 gears because after extensive computer modeling and real world testing we found that gears larger than 4.89 would not last as many miles, and that larger gears created excess torque on an already weak case. Accept no Substitutes! 
We can supply a complete kit which includes new bearings, new gaskets, roller bearings, flange nuts, a complete set of all necessary shims to rebuild your t-case (stock or GRS). It also includes an exploded diagram to illustrate how to put it together!
Just like the stock part (our part no. GRS-2250) except that this part is made from polyurethane. 