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Old 09-05-2012, 07:45 PM   #1
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hello i have a 1998 gmc jimmy 4.2 4x4 can anyone tell me if all of the 7.5 differential covers with the ten bolt hole'* are the 3.73 gear ratio ???
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Old 09-06-2012, 07:46 AM   #2
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you have to look at the rpo code sticker and look it up online. this is for a full size but you look in the glovebox:
GQ1 -- AXLE REAR, STD RATIO
GT4 -- AXLE REAR, 3.73 RATIO
GT5 -- AXLE REAR, 4.10 RATIO
GU4 -- AXLE REAR, 3.08 RATIO
GU5 -- AXLE REAR, 3.23 RATIO
GU6 -- AXLE REAR, 3.42 RATIO
G80 -- AXLE REAR, LIMITED SLIP (POSITRACTION)
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Old 09-06-2012, 02:53 PM   #3
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thanks it helps alot
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Old 09-06-2012, 08:22 PM   #4
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GQ1-STD Ratio. What is a standard ratio?
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Old 09-06-2012, 08:28 PM   #5
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ive been told that just mean the standard level like not heavy duty
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Old 09-06-2012, 08:31 PM   #6
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Ahhh. Gotcha. My *-10 has the GU6 and G80.
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Old 09-07-2012, 09:10 PM   #7
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Usually the */T platforms have a 3:42, most of them have the G80 also.
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