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Old 05-30-2006, 06:37 PM
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7.5 Rear gear swap effect reliability?

i have a 82 Grand prix with a 350/350 2.73 10bolt 7.5 w/ 295/50R15's in the back. im just starting to collect all the parts to do a transmission and rear end swap this fall. ive picked up a 700r4 and right now im looking for some new gears. trying to decide between a 3.42 and 3.73. my motor is under 300hp. my original rear end came with 2.29 that im going to use again for the new gears. by swapping to a 3.42 or 3.73(found 3.42 complete rear w/gov lock or set of 3.73 gears for my stock carrier for cheap) how will it effect the reliability of the rear end?

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Old 05-31-2006, 11:19 PM
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Installing a Gov-lock will most likely diminish the reliability of your rear end. They have a reputation for grenading with only slight provocation.
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Old 06-01-2006, 07:25 AM
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what about a simple ring and pinion gear swap from 2.29-3.73... am i going to loose reliability? im just trying to think and from what i understand the only thing that would take more beating is the axles? and maybe bearings?
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Old 06-01-2006, 09:58 PM
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I think anything past the pinion gear will be more heavily strained. I also think you have to change the carrier if you go from 2.29 to 3.73.
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